Análises quali- e quantitativa de cafés comerciais via ressonância magnética nuclear

Coffee is one of the beverages most widely consumed in the world and the "cafezinho" is normally prepared from a blend of roasted powder of two species, Coffea arabica and Coffea canephora. Each one exhibits differences in their taste and in the chemical composition, especially in the caff...
Ausführliche Beschreibung

Gespeichert in:

Autor*in:	Leila Aley Tavares [verfasserIn] Antonio Gilberto Ferreira [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch ; Spanisch ; Portugiesisch

Erschienen:	2006

Schlagwörter:	caffeine quantitative ¹H NMR coffee composition

Übergeordnetes Werk:	In: Química Nova - Sociedade Brasileira de Química, 2004, 29(2006), 5, Seite 911-915
Übergeordnetes Werk:	volume:29 ; year:2006 ; number:5 ; pages:911-915

Links:	Link aufrufen Link aufrufen Link aufrufen Journal toc

DOI / URN:	10.1590/S0100-40422006000500005

Katalog-ID:	DOAJ059303786

Internformat


LEADER	01000caa a22002652 4500
001	DOAJ059303786
003	DE-627
005	20230308232725.0
007	cr uuu---uuuuu
008	230228s2006 xx \|\|\|\|\|o 00\| \|\|eng c
024	7		\|a 10.1590/S0100-40422006000500005 \|2 doi
035			\|a (DE-627)DOAJ059303786
035			\|a (DE-599)DOAJe3e8fbd1b5ec44a980a88d1550abeff0
040			\|a DE-627 \|b ger \|c DE-627 \|e rakwb
041			\|a eng \|a spa \|a por
050		0	\|a QD1-999
100	0		\|a Leila Aley Tavares \|e verfasserin \|4 aut
245	1	0	\|a Análises quali- e quantitativa de cafés comerciais via ressonância magnética nuclear
264		1	\|c 2006
336			\|a Text \|b txt \|2 rdacontent
337			\|a Computermedien \|b c \|2 rdamedia
338			\|a Online-Ressource \|b cr \|2 rdacarrier
520			\|a Coffee is one of the beverages most widely consumed in the world and the "cafezinho" is normally prepared from a blend of roasted powder of two species, Coffea arabica and Coffea canephora. Each one exhibits differences in their taste and in the chemical composition, especially in the caffeine percentage. There are several procedures proposed in the literature for caffeine determination in different samples like soft drinks, coffee, medicines, etc but most of them need a sample workup which involves at least one step of purification. This work describes the quantitative analysis of caffeine using ¹H NMR and the identification of the major components in commercial coffee samples using 1D and 2D NMR techniques without any sample pre-treatment.
650		4	\|a caffeine
650		4	\|a quantitative ¹H NMR
650		4	\|a coffee composition
653		0	\|a Chemistry
700	0		\|a Antonio Gilberto Ferreira \|e verfasserin \|4 aut
773	0	8	\|i In \|t Química Nova \|d Sociedade Brasileira de Química, 2004 \|g 29(2006), 5, Seite 911-915 \|w (DE-627)331773309 \|w (DE-600)2053241-6 \|x 16787064 \|7 nnns
773	1	8	\|g volume:29 \|g year:2006 \|g number:5 \|g pages:911-915
856	4	0	\|u https://doi.org/10.1590/S0100-40422006000500005 \|z kostenfrei
856	4	0	\|u https://doaj.org/article/e3e8fbd1b5ec44a980a88d1550abeff0 \|z kostenfrei
856	4	0	\|u http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422006000500005&lng=en&tlng=en \|z kostenfrei
856	4	2	\|u https://doaj.org/toc/1678-7064 \|y Journal toc \|z kostenfrei
912			\|a GBV_USEFLAG_A
912			\|a SYSFLAG_A
912			\|a GBV_DOAJ
912			\|a GBV_ILN_20
912			\|a GBV_ILN_22
912			\|a GBV_ILN_23
912			\|a GBV_ILN_24
912			\|a GBV_ILN_39
912			\|a GBV_ILN_40
912			\|a GBV_ILN_60
912			\|a GBV_ILN_62
912			\|a GBV_ILN_63
912			\|a GBV_ILN_65
912			\|a GBV_ILN_69
912			\|a GBV_ILN_70
912			\|a GBV_ILN_73
912			\|a GBV_ILN_95
912			\|a GBV_ILN_105
912			\|a GBV_ILN_110
912			\|a GBV_ILN_151
912			\|a GBV_ILN_161
912			\|a GBV_ILN_170
912			\|a GBV_ILN_213
912			\|a GBV_ILN_230
912			\|a GBV_ILN_285
912			\|a GBV_ILN_293
912			\|a GBV_ILN_602
912			\|a GBV_ILN_2014
912			\|a GBV_ILN_4012
912			\|a GBV_ILN_4037
912			\|a GBV_ILN_4112
912			\|a GBV_ILN_4125
912			\|a GBV_ILN_4126
912			\|a GBV_ILN_4249
912			\|a GBV_ILN_4305
912			\|a GBV_ILN_4306
912			\|a GBV_ILN_4307
912			\|a GBV_ILN_4313
912			\|a GBV_ILN_4322
912			\|a GBV_ILN_4323
912			\|a GBV_ILN_4324
912			\|a GBV_ILN_4325
912			\|a GBV_ILN_4335
912			\|a GBV_ILN_4338
912			\|a GBV_ILN_4367
912			\|a GBV_ILN_4700
951			\|a AR
952			\|d 29 \|j 2006 \|e 5 \|h 911-915

Indexfelder

author_variant	l a t lat a g f agf
matchkey_str	article:16787064:2006----::nieqaiqatttvdcfcmriivaesn
hierarchy_sort_str	2006
callnumber-subject-code	QD
publishDate	2006
allfields	10.1590/S0100-40422006000500005 doi (DE-627)DOAJ059303786 (DE-599)DOAJe3e8fbd1b5ec44a980a88d1550abeff0 DE-627 ger DE-627 rakwb eng spa por QD1-999 Leila Aley Tavares verfasserin aut Análises quali- e quantitativa de cafés comerciais via ressonância magnética nuclear 2006 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Coffee is one of the beverages most widely consumed in the world and the "cafezinho" is normally prepared from a blend of roasted powder of two species, Coffea arabica and Coffea canephora. Each one exhibits differences in their taste and in the chemical composition, especially in the caffeine percentage. There are several procedures proposed in the literature for caffeine determination in different samples like soft drinks, coffee, medicines, etc but most of them need a sample workup which involves at least one step of purification. This work describes the quantitative analysis of caffeine using ¹H NMR and the identification of the major components in commercial coffee samples using 1D and 2D NMR techniques without any sample pre-treatment. caffeine quantitative ¹H NMR coffee composition Chemistry Antonio Gilberto Ferreira verfasserin aut In Química Nova Sociedade Brasileira de Química, 2004 29(2006), 5, Seite 911-915 (DE-627)331773309 (DE-600)2053241-6 16787064 nnns volume:29 year:2006 number:5 pages:911-915 https://doi.org/10.1590/S0100-40422006000500005 kostenfrei https://doaj.org/article/e3e8fbd1b5ec44a980a88d1550abeff0 kostenfrei http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422006000500005&lng=en&tlng=en kostenfrei https://doaj.org/toc/1678-7064 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 29 2006 5 911-915
spelling	10.1590/S0100-40422006000500005 doi (DE-627)DOAJ059303786 (DE-599)DOAJe3e8fbd1b5ec44a980a88d1550abeff0 DE-627 ger DE-627 rakwb eng spa por QD1-999 Leila Aley Tavares verfasserin aut Análises quali- e quantitativa de cafés comerciais via ressonância magnética nuclear 2006 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Coffee is one of the beverages most widely consumed in the world and the "cafezinho" is normally prepared from a blend of roasted powder of two species, Coffea arabica and Coffea canephora. Each one exhibits differences in their taste and in the chemical composition, especially in the caffeine percentage. There are several procedures proposed in the literature for caffeine determination in different samples like soft drinks, coffee, medicines, etc but most of them need a sample workup which involves at least one step of purification. This work describes the quantitative analysis of caffeine using ¹H NMR and the identification of the major components in commercial coffee samples using 1D and 2D NMR techniques without any sample pre-treatment. caffeine quantitative ¹H NMR coffee composition Chemistry Antonio Gilberto Ferreira verfasserin aut In Química Nova Sociedade Brasileira de Química, 2004 29(2006), 5, Seite 911-915 (DE-627)331773309 (DE-600)2053241-6 16787064 nnns volume:29 year:2006 number:5 pages:911-915 https://doi.org/10.1590/S0100-40422006000500005 kostenfrei https://doaj.org/article/e3e8fbd1b5ec44a980a88d1550abeff0 kostenfrei http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422006000500005&lng=en&tlng=en kostenfrei https://doaj.org/toc/1678-7064 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 29 2006 5 911-915
allfields_unstemmed	10.1590/S0100-40422006000500005 doi (DE-627)DOAJ059303786 (DE-599)DOAJe3e8fbd1b5ec44a980a88d1550abeff0 DE-627 ger DE-627 rakwb eng spa por QD1-999 Leila Aley Tavares verfasserin aut Análises quali- e quantitativa de cafés comerciais via ressonância magnética nuclear 2006 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Coffee is one of the beverages most widely consumed in the world and the "cafezinho" is normally prepared from a blend of roasted powder of two species, Coffea arabica and Coffea canephora. Each one exhibits differences in their taste and in the chemical composition, especially in the caffeine percentage. There are several procedures proposed in the literature for caffeine determination in different samples like soft drinks, coffee, medicines, etc but most of them need a sample workup which involves at least one step of purification. This work describes the quantitative analysis of caffeine using ¹H NMR and the identification of the major components in commercial coffee samples using 1D and 2D NMR techniques without any sample pre-treatment. caffeine quantitative ¹H NMR coffee composition Chemistry Antonio Gilberto Ferreira verfasserin aut In Química Nova Sociedade Brasileira de Química, 2004 29(2006), 5, Seite 911-915 (DE-627)331773309 (DE-600)2053241-6 16787064 nnns volume:29 year:2006 number:5 pages:911-915 https://doi.org/10.1590/S0100-40422006000500005 kostenfrei https://doaj.org/article/e3e8fbd1b5ec44a980a88d1550abeff0 kostenfrei http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422006000500005&lng=en&tlng=en kostenfrei https://doaj.org/toc/1678-7064 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 29 2006 5 911-915
allfieldsGer	10.1590/S0100-40422006000500005 doi (DE-627)DOAJ059303786 (DE-599)DOAJe3e8fbd1b5ec44a980a88d1550abeff0 DE-627 ger DE-627 rakwb eng spa por QD1-999 Leila Aley Tavares verfasserin aut Análises quali- e quantitativa de cafés comerciais via ressonância magnética nuclear 2006 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Coffee is one of the beverages most widely consumed in the world and the "cafezinho" is normally prepared from a blend of roasted powder of two species, Coffea arabica and Coffea canephora. Each one exhibits differences in their taste and in the chemical composition, especially in the caffeine percentage. There are several procedures proposed in the literature for caffeine determination in different samples like soft drinks, coffee, medicines, etc but most of them need a sample workup which involves at least one step of purification. This work describes the quantitative analysis of caffeine using ¹H NMR and the identification of the major components in commercial coffee samples using 1D and 2D NMR techniques without any sample pre-treatment. caffeine quantitative ¹H NMR coffee composition Chemistry Antonio Gilberto Ferreira verfasserin aut In Química Nova Sociedade Brasileira de Química, 2004 29(2006), 5, Seite 911-915 (DE-627)331773309 (DE-600)2053241-6 16787064 nnns volume:29 year:2006 number:5 pages:911-915 https://doi.org/10.1590/S0100-40422006000500005 kostenfrei https://doaj.org/article/e3e8fbd1b5ec44a980a88d1550abeff0 kostenfrei http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422006000500005&lng=en&tlng=en kostenfrei https://doaj.org/toc/1678-7064 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 29 2006 5 911-915
allfieldsSound	10.1590/S0100-40422006000500005 doi (DE-627)DOAJ059303786 (DE-599)DOAJe3e8fbd1b5ec44a980a88d1550abeff0 DE-627 ger DE-627 rakwb eng spa por QD1-999 Leila Aley Tavares verfasserin aut Análises quali- e quantitativa de cafés comerciais via ressonância magnética nuclear 2006 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Coffee is one of the beverages most widely consumed in the world and the "cafezinho" is normally prepared from a blend of roasted powder of two species, Coffea arabica and Coffea canephora. Each one exhibits differences in their taste and in the chemical composition, especially in the caffeine percentage. There are several procedures proposed in the literature for caffeine determination in different samples like soft drinks, coffee, medicines, etc but most of them need a sample workup which involves at least one step of purification. This work describes the quantitative analysis of caffeine using ¹H NMR and the identification of the major components in commercial coffee samples using 1D and 2D NMR techniques without any sample pre-treatment. caffeine quantitative ¹H NMR coffee composition Chemistry Antonio Gilberto Ferreira verfasserin aut In Química Nova Sociedade Brasileira de Química, 2004 29(2006), 5, Seite 911-915 (DE-627)331773309 (DE-600)2053241-6 16787064 nnns volume:29 year:2006 number:5 pages:911-915 https://doi.org/10.1590/S0100-40422006000500005 kostenfrei https://doaj.org/article/e3e8fbd1b5ec44a980a88d1550abeff0 kostenfrei http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422006000500005&lng=en&tlng=en kostenfrei https://doaj.org/toc/1678-7064 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 29 2006 5 911-915
language	English Spanish Portuguese
source	In Química Nova 29(2006), 5, Seite 911-915 volume:29 year:2006 number:5 pages:911-915
sourceStr	In Química Nova 29(2006), 5, Seite 911-915 volume:29 year:2006 number:5 pages:911-915
format_phy_str_mv	Article
institution	findex.gbv.de
topic_facet	caffeine quantitative ¹H NMR coffee composition Chemistry
isfreeaccess_bool	true
container_title	Química Nova
authorswithroles_txt_mv	Leila Aley Tavares @@aut@@ Antonio Gilberto Ferreira @@aut@@
publishDateDaySort_date	2006-01-01T00:00:00Z
hierarchy_top_id	331773309
id	DOAJ059303786
language_de	englisch spanisch portugiesisch
fullrecord	<?xml version="1.0" encoding="UTF-8"?><collection xmlns="http://www.loc.gov/MARC21/slim"><record><leader>01000caa a22002652 4500</leader><controlfield tag="001">DOAJ059303786</controlfield><controlfield tag="003">DE-627</controlfield><controlfield tag="005">20230308232725.0</controlfield><controlfield tag="007">cr uuu---uuuuu</controlfield><controlfield tag="008">230228s2006 xx \|\|\|\|\|o 00\| \|\|eng c</controlfield><datafield tag="024" ind1="7" ind2=" "><subfield code="a">10.1590/S0100-40422006000500005</subfield><subfield code="2">doi</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-627)DOAJ059303786</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-599)DOAJe3e8fbd1b5ec44a980a88d1550abeff0</subfield></datafield><datafield tag="040" ind1=" " ind2=" "><subfield code="a">DE-627</subfield><subfield code="b">ger</subfield><subfield code="c">DE-627</subfield><subfield code="e">rakwb</subfield></datafield><datafield tag="041" ind1=" " ind2=" "><subfield code="a">eng</subfield><subfield code="a">spa</subfield><subfield code="a">por</subfield></datafield><datafield tag="050" ind1=" " ind2="0"><subfield code="a">QD1-999</subfield></datafield><datafield tag="100" ind1="0" ind2=" "><subfield code="a">Leila Aley Tavares</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="245" ind1="1" ind2="0"><subfield code="a">Análises quali- e quantitativa de cafés comerciais via ressonância magnética nuclear</subfield></datafield><datafield tag="264" ind1=" " ind2="1"><subfield code="c">2006</subfield></datafield><datafield tag="336" ind1=" " ind2=" "><subfield code="a">Text</subfield><subfield code="b">txt</subfield><subfield code="2">rdacontent</subfield></datafield><datafield tag="337" ind1=" " ind2=" "><subfield code="a">Computermedien</subfield><subfield code="b">c</subfield><subfield code="2">rdamedia</subfield></datafield><datafield tag="338" ind1=" " ind2=" "><subfield code="a">Online-Ressource</subfield><subfield code="b">cr</subfield><subfield code="2">rdacarrier</subfield></datafield><datafield tag="520" ind1=" " ind2=" "><subfield code="a">Coffee is one of the beverages most widely consumed in the world and the "cafezinho" is normally prepared from a blend of roasted powder of two species, Coffea arabica and Coffea canephora. Each one exhibits differences in their taste and in the chemical composition, especially in the caffeine percentage. There are several procedures proposed in the literature for caffeine determination in different samples like soft drinks, coffee, medicines, etc but most of them need a sample workup which involves at least one step of purification. This work describes the quantitative analysis of caffeine using ¹H NMR and the identification of the major components in commercial coffee samples using 1D and 2D NMR techniques without any sample pre-treatment.</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">caffeine</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">quantitative ¹H NMR</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">coffee composition</subfield></datafield><datafield tag="653" ind1=" " ind2="0"><subfield code="a">Chemistry</subfield></datafield><datafield tag="700" ind1="0" ind2=" "><subfield code="a">Antonio Gilberto Ferreira</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="773" ind1="0" ind2="8"><subfield code="i">In</subfield><subfield code="t">Química Nova</subfield><subfield code="d">Sociedade Brasileira de Química, 2004</subfield><subfield code="g">29(2006), 5, Seite 911-915</subfield><subfield code="w">(DE-627)331773309</subfield><subfield code="w">(DE-600)2053241-6</subfield><subfield code="x">16787064</subfield><subfield code="7">nnns</subfield></datafield><datafield tag="773" ind1="1" ind2="8"><subfield code="g">volume:29</subfield><subfield code="g">year:2006</subfield><subfield code="g">number:5</subfield><subfield code="g">pages:911-915</subfield></datafield><datafield tag="856" ind1="4" ind2="0"><subfield code="u">https://doi.org/10.1590/S0100-40422006000500005</subfield><subfield code="z">kostenfrei</subfield></datafield><datafield tag="856" ind1="4" ind2="0"><subfield code="u">https://doaj.org/article/e3e8fbd1b5ec44a980a88d1550abeff0</subfield><subfield code="z">kostenfrei</subfield></datafield><datafield tag="856" ind1="4" ind2="0"><subfield code="u">http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422006000500005&lng=en&tlng=en</subfield><subfield code="z">kostenfrei</subfield></datafield><datafield tag="856" ind1="4" ind2="2"><subfield code="u">https://doaj.org/toc/1678-7064</subfield><subfield code="y">Journal toc</subfield><subfield code="z">kostenfrei</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_USEFLAG_A</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">SYSFLAG_A</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_DOAJ</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_20</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_22</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_23</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_24</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_39</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_40</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_60</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_62</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_63</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_65</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_69</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_70</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_73</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_95</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_105</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_110</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_151</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_161</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_170</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_213</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_230</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_285</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_293</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_602</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2014</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4012</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4037</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4112</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4125</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4126</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4249</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4305</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4306</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4307</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4313</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4322</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4323</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4324</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4325</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4335</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4338</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4367</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4700</subfield></datafield><datafield tag="951" ind1=" " ind2=" "><subfield code="a">AR</subfield></datafield><datafield tag="952" ind1=" " ind2=" "><subfield code="d">29</subfield><subfield code="j">2006</subfield><subfield code="e">5</subfield><subfield code="h">911-915</subfield></datafield></record></collection>
callnumber-first	Q - Science
author	Leila Aley Tavares
spellingShingle	Leila Aley Tavares misc QD1-999 misc caffeine misc quantitative ¹H NMR misc coffee composition misc Chemistry Análises quali- e quantitativa de cafés comerciais via ressonância magnética nuclear
authorStr	Leila Aley Tavares
ppnlink_with_tag_str_mv	@@773@@(DE-627)331773309
format	electronic Article
delete_txt_mv	keep
author_role	aut aut
collection	DOAJ
remote_str	true
callnumber-label	QD1-999
illustrated	Not Illustrated
issn	16787064
topic_title	QD1-999 Análises quali- e quantitativa de cafés comerciais via ressonância magnética nuclear caffeine quantitative ¹H NMR coffee composition
topic	misc QD1-999 misc caffeine misc quantitative ¹H NMR misc coffee composition misc Chemistry
topic_unstemmed	misc QD1-999 misc caffeine misc quantitative ¹H NMR misc coffee composition misc Chemistry
topic_browse	misc QD1-999 misc caffeine misc quantitative ¹H NMR misc coffee composition misc Chemistry
format_facet	Elektronische Aufsätze Aufsätze Elektronische Ressource
format_main_str_mv	Text Zeitschrift/Artikel
carriertype_str_mv	cr
hierarchy_parent_title	Química Nova
hierarchy_parent_id	331773309
hierarchy_top_title	Química Nova
isfreeaccess_txt	true
familylinks_str_mv	(DE-627)331773309 (DE-600)2053241-6
title	Análises quali- e quantitativa de cafés comerciais via ressonância magnética nuclear
ctrlnum	(DE-627)DOAJ059303786 (DE-599)DOAJe3e8fbd1b5ec44a980a88d1550abeff0
title_full	Análises quali- e quantitativa de cafés comerciais via ressonância magnética nuclear
author_sort	Leila Aley Tavares
journal	Química Nova
journalStr	Química Nova
callnumber-first-code	Q
lang_code	eng spa por
isOA_bool	true
recordtype	marc
publishDateSort	2006
contenttype_str_mv	txt
container_start_page	911
author_browse	Leila Aley Tavares Antonio Gilberto Ferreira
container_volume	29
class	QD1-999
format_se	Elektronische Aufsätze
author-letter	Leila Aley Tavares
doi_str_mv	10.1590/S0100-40422006000500005
author2-role	verfasserin
title_sort	análises quali- e quantitativa de cafés comerciais via ressonância magnética nuclear
callnumber	QD1-999
title_auth	Análises quali- e quantitativa de cafés comerciais via ressonância magnética nuclear
abstract	Coffee is one of the beverages most widely consumed in the world and the "cafezinho" is normally prepared from a blend of roasted powder of two species, Coffea arabica and Coffea canephora. Each one exhibits differences in their taste and in the chemical composition, especially in the caffeine percentage. There are several procedures proposed in the literature for caffeine determination in different samples like soft drinks, coffee, medicines, etc but most of them need a sample workup which involves at least one step of purification. This work describes the quantitative analysis of caffeine using ¹H NMR and the identification of the major components in commercial coffee samples using 1D and 2D NMR techniques without any sample pre-treatment.
abstractGer	Coffee is one of the beverages most widely consumed in the world and the "cafezinho" is normally prepared from a blend of roasted powder of two species, Coffea arabica and Coffea canephora. Each one exhibits differences in their taste and in the chemical composition, especially in the caffeine percentage. There are several procedures proposed in the literature for caffeine determination in different samples like soft drinks, coffee, medicines, etc but most of them need a sample workup which involves at least one step of purification. This work describes the quantitative analysis of caffeine using ¹H NMR and the identification of the major components in commercial coffee samples using 1D and 2D NMR techniques without any sample pre-treatment.
abstract_unstemmed	Coffee is one of the beverages most widely consumed in the world and the "cafezinho" is normally prepared from a blend of roasted powder of two species, Coffea arabica and Coffea canephora. Each one exhibits differences in their taste and in the chemical composition, especially in the caffeine percentage. There are several procedures proposed in the literature for caffeine determination in different samples like soft drinks, coffee, medicines, etc but most of them need a sample workup which involves at least one step of purification. This work describes the quantitative analysis of caffeine using ¹H NMR and the identification of the major components in commercial coffee samples using 1D and 2D NMR techniques without any sample pre-treatment.
collection_details	GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700
container_issue	5
title_short	Análises quali- e quantitativa de cafés comerciais via ressonância magnética nuclear
url	https://doi.org/10.1590/S0100-40422006000500005 https://doaj.org/article/e3e8fbd1b5ec44a980a88d1550abeff0 http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422006000500005&lng=en&tlng=en https://doaj.org/toc/1678-7064
remote_bool	true
author2	Antonio Gilberto Ferreira
author2Str	Antonio Gilberto Ferreira
ppnlink	331773309
callnumber-subject	QD - Chemistry
mediatype_str_mv	c
isOA_txt	true
hochschulschrift_bool	false
doi_str	10.1590/S0100-40422006000500005
callnumber-a	QD1-999
up_date	2024-07-03T22:49:24.397Z
_version_	1803599965744791552
fullrecord_marcxml	<?xml version="1.0" encoding="UTF-8"?><collection xmlns="http://www.loc.gov/MARC21/slim"><record><leader>01000caa a22002652 4500</leader><controlfield tag="001">DOAJ059303786</controlfield><controlfield tag="003">DE-627</controlfield><controlfield tag="005">20230308232725.0</controlfield><controlfield tag="007">cr uuu---uuuuu</controlfield><controlfield tag="008">230228s2006 xx \|\|\|\|\|o 00\| \|\|eng c</controlfield><datafield tag="024" ind1="7" ind2=" "><subfield code="a">10.1590/S0100-40422006000500005</subfield><subfield code="2">doi</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-627)DOAJ059303786</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-599)DOAJe3e8fbd1b5ec44a980a88d1550abeff0</subfield></datafield><datafield tag="040" ind1=" " ind2=" "><subfield code="a">DE-627</subfield><subfield code="b">ger</subfield><subfield code="c">DE-627</subfield><subfield code="e">rakwb</subfield></datafield><datafield tag="041" ind1=" " ind2=" "><subfield code="a">eng</subfield><subfield code="a">spa</subfield><subfield code="a">por</subfield></datafield><datafield tag="050" ind1=" " ind2="0"><subfield code="a">QD1-999</subfield></datafield><datafield tag="100" ind1="0" ind2=" "><subfield code="a">Leila Aley Tavares</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="245" ind1="1" ind2="0"><subfield code="a">Análises quali- e quantitativa de cafés comerciais via ressonância magnética nuclear</subfield></datafield><datafield tag="264" ind1=" " ind2="1"><subfield code="c">2006</subfield></datafield><datafield tag="336" ind1=" " ind2=" "><subfield code="a">Text</subfield><subfield code="b">txt</subfield><subfield code="2">rdacontent</subfield></datafield><datafield tag="337" ind1=" " ind2=" "><subfield code="a">Computermedien</subfield><subfield code="b">c</subfield><subfield code="2">rdamedia</subfield></datafield><datafield tag="338" ind1=" " ind2=" "><subfield code="a">Online-Ressource</subfield><subfield code="b">cr</subfield><subfield code="2">rdacarrier</subfield></datafield><datafield tag="520" ind1=" " ind2=" "><subfield code="a">Coffee is one of the beverages most widely consumed in the world and the "cafezinho" is normally prepared from a blend of roasted powder of two species, Coffea arabica and Coffea canephora. Each one exhibits differences in their taste and in the chemical composition, especially in the caffeine percentage. There are several procedures proposed in the literature for caffeine determination in different samples like soft drinks, coffee, medicines, etc but most of them need a sample workup which involves at least one step of purification. This work describes the quantitative analysis of caffeine using ¹H NMR and the identification of the major components in commercial coffee samples using 1D and 2D NMR techniques without any sample pre-treatment.</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">caffeine</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">quantitative ¹H NMR</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">coffee composition</subfield></datafield><datafield tag="653" ind1=" " ind2="0"><subfield code="a">Chemistry</subfield></datafield><datafield tag="700" ind1="0" ind2=" "><subfield code="a">Antonio Gilberto Ferreira</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="773" ind1="0" ind2="8"><subfield code="i">In</subfield><subfield code="t">Química Nova</subfield><subfield code="d">Sociedade Brasileira de Química, 2004</subfield><subfield code="g">29(2006), 5, Seite 911-915</subfield><subfield code="w">(DE-627)331773309</subfield><subfield code="w">(DE-600)2053241-6</subfield><subfield code="x">16787064</subfield><subfield code="7">nnns</subfield></datafield><datafield tag="773" ind1="1" ind2="8"><subfield code="g">volume:29</subfield><subfield code="g">year:2006</subfield><subfield code="g">number:5</subfield><subfield code="g">pages:911-915</subfield></datafield><datafield tag="856" ind1="4" ind2="0"><subfield code="u">https://doi.org/10.1590/S0100-40422006000500005</subfield><subfield code="z">kostenfrei</subfield></datafield><datafield tag="856" ind1="4" ind2="0"><subfield code="u">https://doaj.org/article/e3e8fbd1b5ec44a980a88d1550abeff0</subfield><subfield code="z">kostenfrei</subfield></datafield><datafield tag="856" ind1="4" ind2="0"><subfield code="u">http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422006000500005&lng=en&tlng=en</subfield><subfield code="z">kostenfrei</subfield></datafield><datafield tag="856" ind1="4" ind2="2"><subfield code="u">https://doaj.org/toc/1678-7064</subfield><subfield code="y">Journal toc</subfield><subfield code="z">kostenfrei</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_USEFLAG_A</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">SYSFLAG_A</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_DOAJ</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_20</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_22</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_23</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_24</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_39</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_40</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_60</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_62</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_63</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_65</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_69</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_70</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_73</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_95</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_105</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_110</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_151</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_161</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_170</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_213</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_230</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_285</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_293</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_602</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2014</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4012</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4037</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4112</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4125</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4126</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4249</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4305</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4306</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4307</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4313</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4322</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4323</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4324</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4325</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4335</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4338</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4367</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4700</subfield></datafield><datafield tag="951" ind1=" " ind2=" "><subfield code="a">AR</subfield></datafield><datafield tag="952" ind1=" " ind2=" "><subfield code="d">29</subfield><subfield code="j">2006</subfield><subfield code="e">5</subfield><subfield code="h">911-915</subfield></datafield></record></collection>
score	7.397993

Nicht das Richtige dabei?

Schreiben Sie uns!

Análises quali- e quantitativa de cafés comerciais via ressonância magnética nuclear

Nicht das Richtige dabei?

Zugang & Verfügbarkeit

Vorhandene Bände

Nicht das Richtige dabei?