Spectrophotometric loop flow analyzer for high-precision measurement of seawater pH

Automated instrument for long-term measurement of seawater pH is important for documenting the changes of the marine carbonate system and the impacts of ocean acidification. An automated pH analyzer based on loop flow analysis (LFA-pH) was developed to achieve precise and accurate measurements of se...
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Autor*in:	Cao, Lu [verfasserIn] Qi, Di [verfasserIn] Li, Quanlong [verfasserIn] Yang, Bo [verfasserIn] Zhang, Yunyan [verfasserIn] Zhang, Shuwei [verfasserIn] Qi, Shengbo [verfasserIn] Zhang, Yingying [verfasserIn] Liu, Yan [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2020

Schlagwörter:	pH analyzer Spectrophotometry Loop flow analysis Underway

Übergeordnetes Werk:	Enthalten in: Talanta - Amsterdam [u.a.] : Elsevier Science, 1958, 224
Übergeordnetes Werk:	volume:224

DOI / URN:	10.1016/j.talanta.2020.121775

Katalog-ID:	ELV005251494

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245	1	0	\|a Spectrophotometric loop flow analyzer for high-precision measurement of seawater pH
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520			\|a Automated instrument for long-term measurement of seawater pH is important for documenting the changes of the marine carbonate system and the impacts of ocean acidification. An automated pH analyzer based on loop flow analysis (LFA-pH) was developed to achieve precise and accurate measurements of seawater pH. The circulating loop allows complete mixing of an indicator and seawater, constant mixing volume of two solutions, and correcting indicator perturbation for each measurement. During laboratory testing, the LFA-pH precision achieved 0.0004, and the accuracy was 0.0017 ± 0.0038 compared with the certified standard buffer at different temperatures. During the 59 day underway measurement across the mid and high latitudes, more than 2500 pH measurements were carried out. LFA-pH showed good stability with high temperature and salinity changes, and measurement results were consistent with the discrete surface seawater pH measurement data. In situ testing of two LFA-pHs was completed near the Zhongyuan pier in Qingdao. The average pH offset between the two LFA-pHs was 0.0010 ± 0.0032 (n = 788), with the accuracies of the two LFA-pHs of 0.0012 ± 0.0033 and 0.0005 ± 0.0035 compared to discrete measurements. For continuous measurement, the average power consumption is 3.6 W at a 10 min measurement frequency. Given its low power consumption, high precision, and accuracy, FLA-pH could be adapted for underway and in situ measurements of ocean acidification observations.
650		4	\|a pH analyzer
650		4	\|a Spectrophotometry
650		4	\|a Loop flow analysis
650		4	\|a Underway
700	1		\|a Qi, Di \|e verfasserin \|0 (orcid)0000-0003-4762-266X \|4 aut
700	1		\|a Li, Quanlong \|e verfasserin \|4 aut
700	1		\|a Yang, Bo \|e verfasserin \|0 (orcid)0000-0001-5617-5748 \|4 aut
700	1		\|a Zhang, Yunyan \|e verfasserin \|4 aut
700	1		\|a Zhang, Shuwei \|e verfasserin \|4 aut
700	1		\|a Qi, Shengbo \|e verfasserin \|4 aut
700	1		\|a Zhang, Yingying \|e verfasserin \|4 aut
700	1		\|a Liu, Yan \|e verfasserin \|4 aut
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936	b	k	\|a 35.00 \|j Chemie: Allgemeines
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Indexfelder

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publishDate	2020
allfields	10.1016/j.talanta.2020.121775 doi (DE-627)ELV005251494 (ELSEVIER)S0039-9140(20)31066-3 DE-627 ger DE-627 rda eng 540 DE-600 35.00 bkl Cao, Lu verfasserin (orcid)0000-0002-1993-1986 aut Spectrophotometric loop flow analyzer for high-precision measurement of seawater pH 2020 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Automated instrument for long-term measurement of seawater pH is important for documenting the changes of the marine carbonate system and the impacts of ocean acidification. An automated pH analyzer based on loop flow analysis (LFA-pH) was developed to achieve precise and accurate measurements of seawater pH. The circulating loop allows complete mixing of an indicator and seawater, constant mixing volume of two solutions, and correcting indicator perturbation for each measurement. During laboratory testing, the LFA-pH precision achieved 0.0004, and the accuracy was 0.0017 ± 0.0038 compared with the certified standard buffer at different temperatures. During the 59 day underway measurement across the mid and high latitudes, more than 2500 pH measurements were carried out. LFA-pH showed good stability with high temperature and salinity changes, and measurement results were consistent with the discrete surface seawater pH measurement data. In situ testing of two LFA-pHs was completed near the Zhongyuan pier in Qingdao. The average pH offset between the two LFA-pHs was 0.0010 ± 0.0032 (n = 788), with the accuracies of the two LFA-pHs of 0.0012 ± 0.0033 and 0.0005 ± 0.0035 compared to discrete measurements. For continuous measurement, the average power consumption is 3.6 W at a 10 min measurement frequency. Given its low power consumption, high precision, and accuracy, FLA-pH could be adapted for underway and in situ measurements of ocean acidification observations. pH analyzer Spectrophotometry Loop flow analysis Underway Qi, Di verfasserin (orcid)0000-0003-4762-266X aut Li, Quanlong verfasserin aut Yang, Bo verfasserin (orcid)0000-0001-5617-5748 aut Zhang, Yunyan verfasserin aut Zhang, Shuwei verfasserin aut Qi, Shengbo verfasserin aut Zhang, Yingying verfasserin aut Liu, Yan verfasserin aut Enthalten in Talanta Amsterdam [u.a.] : Elsevier Science, 1958 224 Online-Ressource (DE-627)306712571 (DE-600)1500969-5 (DE-576)251938158 1873-3573 nnns volume:224 GBV_USEFLAG_U SYSFLAG_U GBV_ELV SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 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_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 35.00 Chemie: Allgemeines AR 224
spelling	10.1016/j.talanta.2020.121775 doi (DE-627)ELV005251494 (ELSEVIER)S0039-9140(20)31066-3 DE-627 ger DE-627 rda eng 540 DE-600 35.00 bkl Cao, Lu verfasserin (orcid)0000-0002-1993-1986 aut Spectrophotometric loop flow analyzer for high-precision measurement of seawater pH 2020 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Automated instrument for long-term measurement of seawater pH is important for documenting the changes of the marine carbonate system and the impacts of ocean acidification. An automated pH analyzer based on loop flow analysis (LFA-pH) was developed to achieve precise and accurate measurements of seawater pH. The circulating loop allows complete mixing of an indicator and seawater, constant mixing volume of two solutions, and correcting indicator perturbation for each measurement. During laboratory testing, the LFA-pH precision achieved 0.0004, and the accuracy was 0.0017 ± 0.0038 compared with the certified standard buffer at different temperatures. During the 59 day underway measurement across the mid and high latitudes, more than 2500 pH measurements were carried out. LFA-pH showed good stability with high temperature and salinity changes, and measurement results were consistent with the discrete surface seawater pH measurement data. In situ testing of two LFA-pHs was completed near the Zhongyuan pier in Qingdao. The average pH offset between the two LFA-pHs was 0.0010 ± 0.0032 (n = 788), with the accuracies of the two LFA-pHs of 0.0012 ± 0.0033 and 0.0005 ± 0.0035 compared to discrete measurements. For continuous measurement, the average power consumption is 3.6 W at a 10 min measurement frequency. Given its low power consumption, high precision, and accuracy, FLA-pH could be adapted for underway and in situ measurements of ocean acidification observations. pH analyzer Spectrophotometry Loop flow analysis Underway Qi, Di verfasserin (orcid)0000-0003-4762-266X aut Li, Quanlong verfasserin aut Yang, Bo verfasserin (orcid)0000-0001-5617-5748 aut Zhang, Yunyan verfasserin aut Zhang, Shuwei verfasserin aut Qi, Shengbo verfasserin aut Zhang, Yingying verfasserin aut Liu, Yan verfasserin aut Enthalten in Talanta Amsterdam [u.a.] : Elsevier Science, 1958 224 Online-Ressource (DE-627)306712571 (DE-600)1500969-5 (DE-576)251938158 1873-3573 nnns volume:224 GBV_USEFLAG_U SYSFLAG_U GBV_ELV SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 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_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 35.00 Chemie: Allgemeines AR 224
allfields_unstemmed	10.1016/j.talanta.2020.121775 doi (DE-627)ELV005251494 (ELSEVIER)S0039-9140(20)31066-3 DE-627 ger DE-627 rda eng 540 DE-600 35.00 bkl Cao, Lu verfasserin (orcid)0000-0002-1993-1986 aut Spectrophotometric loop flow analyzer for high-precision measurement of seawater pH 2020 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Automated instrument for long-term measurement of seawater pH is important for documenting the changes of the marine carbonate system and the impacts of ocean acidification. An automated pH analyzer based on loop flow analysis (LFA-pH) was developed to achieve precise and accurate measurements of seawater pH. The circulating loop allows complete mixing of an indicator and seawater, constant mixing volume of two solutions, and correcting indicator perturbation for each measurement. During laboratory testing, the LFA-pH precision achieved 0.0004, and the accuracy was 0.0017 ± 0.0038 compared with the certified standard buffer at different temperatures. During the 59 day underway measurement across the mid and high latitudes, more than 2500 pH measurements were carried out. LFA-pH showed good stability with high temperature and salinity changes, and measurement results were consistent with the discrete surface seawater pH measurement data. In situ testing of two LFA-pHs was completed near the Zhongyuan pier in Qingdao. The average pH offset between the two LFA-pHs was 0.0010 ± 0.0032 (n = 788), with the accuracies of the two LFA-pHs of 0.0012 ± 0.0033 and 0.0005 ± 0.0035 compared to discrete measurements. For continuous measurement, the average power consumption is 3.6 W at a 10 min measurement frequency. Given its low power consumption, high precision, and accuracy, FLA-pH could be adapted for underway and in situ measurements of ocean acidification observations. pH analyzer Spectrophotometry Loop flow analysis Underway Qi, Di verfasserin (orcid)0000-0003-4762-266X aut Li, Quanlong verfasserin aut Yang, Bo verfasserin (orcid)0000-0001-5617-5748 aut Zhang, Yunyan verfasserin aut Zhang, Shuwei verfasserin aut Qi, Shengbo verfasserin aut Zhang, Yingying verfasserin aut Liu, Yan verfasserin aut Enthalten in Talanta Amsterdam [u.a.] : Elsevier Science, 1958 224 Online-Ressource (DE-627)306712571 (DE-600)1500969-5 (DE-576)251938158 1873-3573 nnns volume:224 GBV_USEFLAG_U SYSFLAG_U GBV_ELV SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 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_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 35.00 Chemie: Allgemeines AR 224
allfieldsGer	10.1016/j.talanta.2020.121775 doi (DE-627)ELV005251494 (ELSEVIER)S0039-9140(20)31066-3 DE-627 ger DE-627 rda eng 540 DE-600 35.00 bkl Cao, Lu verfasserin (orcid)0000-0002-1993-1986 aut Spectrophotometric loop flow analyzer for high-precision measurement of seawater pH 2020 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Automated instrument for long-term measurement of seawater pH is important for documenting the changes of the marine carbonate system and the impacts of ocean acidification. An automated pH analyzer based on loop flow analysis (LFA-pH) was developed to achieve precise and accurate measurements of seawater pH. The circulating loop allows complete mixing of an indicator and seawater, constant mixing volume of two solutions, and correcting indicator perturbation for each measurement. During laboratory testing, the LFA-pH precision achieved 0.0004, and the accuracy was 0.0017 ± 0.0038 compared with the certified standard buffer at different temperatures. During the 59 day underway measurement across the mid and high latitudes, more than 2500 pH measurements were carried out. LFA-pH showed good stability with high temperature and salinity changes, and measurement results were consistent with the discrete surface seawater pH measurement data. In situ testing of two LFA-pHs was completed near the Zhongyuan pier in Qingdao. The average pH offset between the two LFA-pHs was 0.0010 ± 0.0032 (n = 788), with the accuracies of the two LFA-pHs of 0.0012 ± 0.0033 and 0.0005 ± 0.0035 compared to discrete measurements. For continuous measurement, the average power consumption is 3.6 W at a 10 min measurement frequency. Given its low power consumption, high precision, and accuracy, FLA-pH could be adapted for underway and in situ measurements of ocean acidification observations. pH analyzer Spectrophotometry Loop flow analysis Underway Qi, Di verfasserin (orcid)0000-0003-4762-266X aut Li, Quanlong verfasserin aut Yang, Bo verfasserin (orcid)0000-0001-5617-5748 aut Zhang, Yunyan verfasserin aut Zhang, Shuwei verfasserin aut Qi, Shengbo verfasserin aut Zhang, Yingying verfasserin aut Liu, Yan verfasserin aut Enthalten in Talanta Amsterdam [u.a.] : Elsevier Science, 1958 224 Online-Ressource (DE-627)306712571 (DE-600)1500969-5 (DE-576)251938158 1873-3573 nnns volume:224 GBV_USEFLAG_U SYSFLAG_U GBV_ELV SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 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_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 35.00 Chemie: Allgemeines AR 224
allfieldsSound	10.1016/j.talanta.2020.121775 doi (DE-627)ELV005251494 (ELSEVIER)S0039-9140(20)31066-3 DE-627 ger DE-627 rda eng 540 DE-600 35.00 bkl Cao, Lu verfasserin (orcid)0000-0002-1993-1986 aut Spectrophotometric loop flow analyzer for high-precision measurement of seawater pH 2020 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Automated instrument for long-term measurement of seawater pH is important for documenting the changes of the marine carbonate system and the impacts of ocean acidification. An automated pH analyzer based on loop flow analysis (LFA-pH) was developed to achieve precise and accurate measurements of seawater pH. The circulating loop allows complete mixing of an indicator and seawater, constant mixing volume of two solutions, and correcting indicator perturbation for each measurement. During laboratory testing, the LFA-pH precision achieved 0.0004, and the accuracy was 0.0017 ± 0.0038 compared with the certified standard buffer at different temperatures. During the 59 day underway measurement across the mid and high latitudes, more than 2500 pH measurements were carried out. LFA-pH showed good stability with high temperature and salinity changes, and measurement results were consistent with the discrete surface seawater pH measurement data. In situ testing of two LFA-pHs was completed near the Zhongyuan pier in Qingdao. The average pH offset between the two LFA-pHs was 0.0010 ± 0.0032 (n = 788), with the accuracies of the two LFA-pHs of 0.0012 ± 0.0033 and 0.0005 ± 0.0035 compared to discrete measurements. For continuous measurement, the average power consumption is 3.6 W at a 10 min measurement frequency. Given its low power consumption, high precision, and accuracy, FLA-pH could be adapted for underway and in situ measurements of ocean acidification observations. pH analyzer Spectrophotometry Loop flow analysis Underway Qi, Di verfasserin (orcid)0000-0003-4762-266X aut Li, Quanlong verfasserin aut Yang, Bo verfasserin (orcid)0000-0001-5617-5748 aut Zhang, Yunyan verfasserin aut Zhang, Shuwei verfasserin aut Qi, Shengbo verfasserin aut Zhang, Yingying verfasserin aut Liu, Yan verfasserin aut Enthalten in Talanta Amsterdam [u.a.] : Elsevier Science, 1958 224 Online-Ressource (DE-627)306712571 (DE-600)1500969-5 (DE-576)251938158 1873-3573 nnns volume:224 GBV_USEFLAG_U SYSFLAG_U GBV_ELV SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 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_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 35.00 Chemie: Allgemeines AR 224
language	English
source	Enthalten in Talanta 224 volume:224
sourceStr	Enthalten in Talanta 224 volume:224
format_phy_str_mv	Article
bklname	Chemie: Allgemeines
institution	findex.gbv.de
topic_facet	pH analyzer Spectrophotometry Loop flow analysis Underway
dewey-raw	540
isfreeaccess_bool	false
container_title	Talanta
authorswithroles_txt_mv	Cao, Lu @@aut@@ Qi, Di @@aut@@ Li, Quanlong @@aut@@ Yang, Bo @@aut@@ Zhang, Yunyan @@aut@@ Zhang, Shuwei @@aut@@ Qi, Shengbo @@aut@@ Zhang, Yingying @@aut@@ Liu, Yan @@aut@@
publishDateDaySort_date	2020-01-01T00:00:00Z
hierarchy_top_id	306712571
dewey-sort	3540
id	ELV005251494
language_de	englisch
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author	Cao, Lu
spellingShingle	Cao, Lu ddc 540 bkl 35.00 misc pH analyzer misc Spectrophotometry misc Loop flow analysis misc Underway Spectrophotometric loop flow analyzer for high-precision measurement of seawater pH
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topic_title	540 DE-600 35.00 bkl Spectrophotometric loop flow analyzer for high-precision measurement of seawater pH pH analyzer Spectrophotometry Loop flow analysis Underway
topic	ddc 540 bkl 35.00 misc pH analyzer misc Spectrophotometry misc Loop flow analysis misc Underway
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title	Spectrophotometric loop flow analyzer for high-precision measurement of seawater pH
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title_full	Spectrophotometric loop flow analyzer for high-precision measurement of seawater pH
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title_sort	spectrophotometric loop flow analyzer for high-precision measurement of seawater ph
title_auth	Spectrophotometric loop flow analyzer for high-precision measurement of seawater pH
abstract	Automated instrument for long-term measurement of seawater pH is important for documenting the changes of the marine carbonate system and the impacts of ocean acidification. An automated pH analyzer based on loop flow analysis (LFA-pH) was developed to achieve precise and accurate measurements of seawater pH. The circulating loop allows complete mixing of an indicator and seawater, constant mixing volume of two solutions, and correcting indicator perturbation for each measurement. During laboratory testing, the LFA-pH precision achieved 0.0004, and the accuracy was 0.0017 ± 0.0038 compared with the certified standard buffer at different temperatures. During the 59 day underway measurement across the mid and high latitudes, more than 2500 pH measurements were carried out. LFA-pH showed good stability with high temperature and salinity changes, and measurement results were consistent with the discrete surface seawater pH measurement data. In situ testing of two LFA-pHs was completed near the Zhongyuan pier in Qingdao. The average pH offset between the two LFA-pHs was 0.0010 ± 0.0032 (n = 788), with the accuracies of the two LFA-pHs of 0.0012 ± 0.0033 and 0.0005 ± 0.0035 compared to discrete measurements. For continuous measurement, the average power consumption is 3.6 W at a 10 min measurement frequency. Given its low power consumption, high precision, and accuracy, FLA-pH could be adapted for underway and in situ measurements of ocean acidification observations.
abstractGer	Automated instrument for long-term measurement of seawater pH is important for documenting the changes of the marine carbonate system and the impacts of ocean acidification. An automated pH analyzer based on loop flow analysis (LFA-pH) was developed to achieve precise and accurate measurements of seawater pH. The circulating loop allows complete mixing of an indicator and seawater, constant mixing volume of two solutions, and correcting indicator perturbation for each measurement. During laboratory testing, the LFA-pH precision achieved 0.0004, and the accuracy was 0.0017 ± 0.0038 compared with the certified standard buffer at different temperatures. During the 59 day underway measurement across the mid and high latitudes, more than 2500 pH measurements were carried out. LFA-pH showed good stability with high temperature and salinity changes, and measurement results were consistent with the discrete surface seawater pH measurement data. In situ testing of two LFA-pHs was completed near the Zhongyuan pier in Qingdao. The average pH offset between the two LFA-pHs was 0.0010 ± 0.0032 (n = 788), with the accuracies of the two LFA-pHs of 0.0012 ± 0.0033 and 0.0005 ± 0.0035 compared to discrete measurements. For continuous measurement, the average power consumption is 3.6 W at a 10 min measurement frequency. Given its low power consumption, high precision, and accuracy, FLA-pH could be adapted for underway and in situ measurements of ocean acidification observations.
abstract_unstemmed	Automated instrument for long-term measurement of seawater pH is important for documenting the changes of the marine carbonate system and the impacts of ocean acidification. An automated pH analyzer based on loop flow analysis (LFA-pH) was developed to achieve precise and accurate measurements of seawater pH. The circulating loop allows complete mixing of an indicator and seawater, constant mixing volume of two solutions, and correcting indicator perturbation for each measurement. During laboratory testing, the LFA-pH precision achieved 0.0004, and the accuracy was 0.0017 ± 0.0038 compared with the certified standard buffer at different temperatures. During the 59 day underway measurement across the mid and high latitudes, more than 2500 pH measurements were carried out. LFA-pH showed good stability with high temperature and salinity changes, and measurement results were consistent with the discrete surface seawater pH measurement data. In situ testing of two LFA-pHs was completed near the Zhongyuan pier in Qingdao. The average pH offset between the two LFA-pHs was 0.0010 ± 0.0032 (n = 788), with the accuracies of the two LFA-pHs of 0.0012 ± 0.0033 and 0.0005 ± 0.0035 compared to discrete measurements. For continuous measurement, the average power consumption is 3.6 W at a 10 min measurement frequency. Given its low power consumption, high precision, and accuracy, FLA-pH could be adapted for underway and in situ measurements of ocean acidification observations.
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title_short	Spectrophotometric loop flow analyzer for high-precision measurement of seawater pH
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author2	Qi, Di Li, Quanlong Yang, Bo Zhang, Yunyan Zhang, Shuwei Qi, Shengbo Zhang, Yingying Liu, Yan
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up_date	2024-07-06T17:19:53.901Z
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Spectrophotometric loop flow analyzer for high-precision measurement of seawater pH

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