Integrated microwave processing system for the extraction of organophosphorus pesticides in fresh vegetables
A simple and efficient integrated microwave processing system (IMPS) was firstly assembled and validated for the extraction of organophosphorus pesticides in fresh vegetables. Two processes under microwave irradiation, dynamic microwave-assisted extraction (DMAE) and microwave-accelerated solvent el...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Wu, Lijie [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2015transfer abstract |
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| Umfang: |
7 |
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| Übergeordnetes Werk: |
Enthalten in: Optical, water splitting and wettability of titanium nitride/titanium oxynitride bilayer films for hydrogen generation and solar cells applications - Mohamed, S.H. ELSEVIER, 2019, the international journal of pure and applied analytical chemistry, Amsterdam [u.a.] |
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| Übergeordnetes Werk: |
volume:134 ; year:2015 ; day:1 ; month:03 ; pages:366-372 ; extent:7 |
| Links: |
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| DOI / URN: |
10.1016/j.talanta.2014.11.035 |
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| 245 | 1 | 0 | |a Integrated microwave processing system for the extraction of organophosphorus pesticides in fresh vegetables |
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| 520 | |a A simple and efficient integrated microwave processing system (IMPS) was firstly assembled and validated for the extraction of organophosphorus pesticides in fresh vegetables. Two processes under microwave irradiation, dynamic microwave-assisted extraction (DMAE) and microwave-accelerated solvent elution (MASE), were integrated for simplifying the pretreatment of the sample. Extraction, separation, enrichment and elution were finished in a simple step. The organophosphorus pesticides were extracted from the fresh vegetables into hexane with DMAE, and then the extract was directly introduced into the enrichment column packed with active carbon fiber (ACF). Subsequently, the organophosphorus pesticides trapped on the ACF were eluted with ethyl acetate under microwave irradiation. No further filtration or cleanup was required before analysis of the eluate by gas chromatography–mass spectrometry. Some experimental parameters affecting extraction efficiency were investigated and optimized, such as microwave output power, kind and volume of extraction solvent, extraction time, amount of sorbent, elution microwave power, kind and volume of elution solvent, elution solvent flow rate. Under the optimized conditions, the recoveries were in the range of 71.5–105.2%, and the relative standard deviations were lower than 11.6%. The experiment results prove that the present method is a simple and effective sample preparation method for the determination of pesticides in solid samples. | ||
| 520 | |a A simple and efficient integrated microwave processing system (IMPS) was firstly assembled and validated for the extraction of organophosphorus pesticides in fresh vegetables. Two processes under microwave irradiation, dynamic microwave-assisted extraction (DMAE) and microwave-accelerated solvent elution (MASE), were integrated for simplifying the pretreatment of the sample. Extraction, separation, enrichment and elution were finished in a simple step. The organophosphorus pesticides were extracted from the fresh vegetables into hexane with DMAE, and then the extract was directly introduced into the enrichment column packed with active carbon fiber (ACF). Subsequently, the organophosphorus pesticides trapped on the ACF were eluted with ethyl acetate under microwave irradiation. No further filtration or cleanup was required before analysis of the eluate by gas chromatography–mass spectrometry. Some experimental parameters affecting extraction efficiency were investigated and optimized, such as microwave output power, kind and volume of extraction solvent, extraction time, amount of sorbent, elution microwave power, kind and volume of elution solvent, elution solvent flow rate. Under the optimized conditions, the recoveries were in the range of 71.5–105.2%, and the relative standard deviations were lower than 11.6%. The experiment results prove that the present method is a simple and effective sample preparation method for the determination of pesticides in solid samples. | ||
| 650 | 7 | |a Fresh vegetables |2 Elsevier | |
| 650 | 7 | |a Integrated microwave processing system |2 Elsevier | |
| 650 | 7 | |a Organophosphorus pesticides |2 Elsevier | |
| 650 | 7 | |a Gas chromatography–mass spectrometry |2 Elsevier | |
| 700 | 1 | |a Song, Ying |4 oth | |
| 700 | 1 | |a Hu, Mingzhu |4 oth | |
| 700 | 1 | |a Xu, Xu |4 oth | |
| 700 | 1 | |a Zhang, Hanqi |4 oth | |
| 700 | 1 | |a Yu, Aimin |4 oth | |
| 700 | 1 | |a Ma, Qiang |4 oth | |
| 700 | 1 | |a Wang, Ziming |4 oth | |
| 773 | 0 | 8 | |i Enthalten in |n Elsevier Science |a Mohamed, S.H. ELSEVIER |t Optical, water splitting and wettability of titanium nitride/titanium oxynitride bilayer films for hydrogen generation and solar cells applications |d 2019 |d the international journal of pure and applied analytical chemistry |g Amsterdam [u.a.] |w (DE-627)ELV003060667 |
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10.1016/j.talanta.2014.11.035 doi GBV00000000000192A.pica (DE-627)ELV018127576 (ELSEVIER)S0039-9140(14)00927-8 DE-627 ger DE-627 rakwb eng 540 540 DE-600 530 620 VZ 53.56 bkl Wu, Lijie verfasserin aut Integrated microwave processing system for the extraction of organophosphorus pesticides in fresh vegetables 2015transfer abstract 7 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier A simple and efficient integrated microwave processing system (IMPS) was firstly assembled and validated for the extraction of organophosphorus pesticides in fresh vegetables. Two processes under microwave irradiation, dynamic microwave-assisted extraction (DMAE) and microwave-accelerated solvent elution (MASE), were integrated for simplifying the pretreatment of the sample. Extraction, separation, enrichment and elution were finished in a simple step. The organophosphorus pesticides were extracted from the fresh vegetables into hexane with DMAE, and then the extract was directly introduced into the enrichment column packed with active carbon fiber (ACF). Subsequently, the organophosphorus pesticides trapped on the ACF were eluted with ethyl acetate under microwave irradiation. No further filtration or cleanup was required before analysis of the eluate by gas chromatography–mass spectrometry. Some experimental parameters affecting extraction efficiency were investigated and optimized, such as microwave output power, kind and volume of extraction solvent, extraction time, amount of sorbent, elution microwave power, kind and volume of elution solvent, elution solvent flow rate. Under the optimized conditions, the recoveries were in the range of 71.5–105.2%, and the relative standard deviations were lower than 11.6%. The experiment results prove that the present method is a simple and effective sample preparation method for the determination of pesticides in solid samples. A simple and efficient integrated microwave processing system (IMPS) was firstly assembled and validated for the extraction of organophosphorus pesticides in fresh vegetables. Two processes under microwave irradiation, dynamic microwave-assisted extraction (DMAE) and microwave-accelerated solvent elution (MASE), were integrated for simplifying the pretreatment of the sample. Extraction, separation, enrichment and elution were finished in a simple step. The organophosphorus pesticides were extracted from the fresh vegetables into hexane with DMAE, and then the extract was directly introduced into the enrichment column packed with active carbon fiber (ACF). Subsequently, the organophosphorus pesticides trapped on the ACF were eluted with ethyl acetate under microwave irradiation. No further filtration or cleanup was required before analysis of the eluate by gas chromatography–mass spectrometry. Some experimental parameters affecting extraction efficiency were investigated and optimized, such as microwave output power, kind and volume of extraction solvent, extraction time, amount of sorbent, elution microwave power, kind and volume of elution solvent, elution solvent flow rate. Under the optimized conditions, the recoveries were in the range of 71.5–105.2%, and the relative standard deviations were lower than 11.6%. The experiment results prove that the present method is a simple and effective sample preparation method for the determination of pesticides in solid samples. Fresh vegetables Elsevier Integrated microwave processing system Elsevier Organophosphorus pesticides Elsevier Gas chromatography–mass spectrometry Elsevier Song, Ying oth Hu, Mingzhu oth Xu, Xu oth Zhang, Hanqi oth Yu, Aimin oth Ma, Qiang oth Wang, Ziming oth Enthalten in Elsevier Science Mohamed, S.H. ELSEVIER Optical, water splitting and wettability of titanium nitride/titanium oxynitride bilayer films for hydrogen generation and solar cells applications 2019 the international journal of pure and applied analytical chemistry Amsterdam [u.a.] (DE-627)ELV003060667 volume:134 year:2015 day:1 month:03 pages:366-372 extent:7 https://doi.org/10.1016/j.talanta.2014.11.035 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U 53.56 Halbleitertechnologie VZ AR 134 2015 1 0301 366-372 7 045F 540 |
| spelling |
10.1016/j.talanta.2014.11.035 doi GBV00000000000192A.pica (DE-627)ELV018127576 (ELSEVIER)S0039-9140(14)00927-8 DE-627 ger DE-627 rakwb eng 540 540 DE-600 530 620 VZ 53.56 bkl Wu, Lijie verfasserin aut Integrated microwave processing system for the extraction of organophosphorus pesticides in fresh vegetables 2015transfer abstract 7 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier A simple and efficient integrated microwave processing system (IMPS) was firstly assembled and validated for the extraction of organophosphorus pesticides in fresh vegetables. Two processes under microwave irradiation, dynamic microwave-assisted extraction (DMAE) and microwave-accelerated solvent elution (MASE), were integrated for simplifying the pretreatment of the sample. Extraction, separation, enrichment and elution were finished in a simple step. The organophosphorus pesticides were extracted from the fresh vegetables into hexane with DMAE, and then the extract was directly introduced into the enrichment column packed with active carbon fiber (ACF). Subsequently, the organophosphorus pesticides trapped on the ACF were eluted with ethyl acetate under microwave irradiation. No further filtration or cleanup was required before analysis of the eluate by gas chromatography–mass spectrometry. Some experimental parameters affecting extraction efficiency were investigated and optimized, such as microwave output power, kind and volume of extraction solvent, extraction time, amount of sorbent, elution microwave power, kind and volume of elution solvent, elution solvent flow rate. Under the optimized conditions, the recoveries were in the range of 71.5–105.2%, and the relative standard deviations were lower than 11.6%. The experiment results prove that the present method is a simple and effective sample preparation method for the determination of pesticides in solid samples. A simple and efficient integrated microwave processing system (IMPS) was firstly assembled and validated for the extraction of organophosphorus pesticides in fresh vegetables. Two processes under microwave irradiation, dynamic microwave-assisted extraction (DMAE) and microwave-accelerated solvent elution (MASE), were integrated for simplifying the pretreatment of the sample. Extraction, separation, enrichment and elution were finished in a simple step. The organophosphorus pesticides were extracted from the fresh vegetables into hexane with DMAE, and then the extract was directly introduced into the enrichment column packed with active carbon fiber (ACF). Subsequently, the organophosphorus pesticides trapped on the ACF were eluted with ethyl acetate under microwave irradiation. No further filtration or cleanup was required before analysis of the eluate by gas chromatography–mass spectrometry. Some experimental parameters affecting extraction efficiency were investigated and optimized, such as microwave output power, kind and volume of extraction solvent, extraction time, amount of sorbent, elution microwave power, kind and volume of elution solvent, elution solvent flow rate. Under the optimized conditions, the recoveries were in the range of 71.5–105.2%, and the relative standard deviations were lower than 11.6%. The experiment results prove that the present method is a simple and effective sample preparation method for the determination of pesticides in solid samples. Fresh vegetables Elsevier Integrated microwave processing system Elsevier Organophosphorus pesticides Elsevier Gas chromatography–mass spectrometry Elsevier Song, Ying oth Hu, Mingzhu oth Xu, Xu oth Zhang, Hanqi oth Yu, Aimin oth Ma, Qiang oth Wang, Ziming oth Enthalten in Elsevier Science Mohamed, S.H. ELSEVIER Optical, water splitting and wettability of titanium nitride/titanium oxynitride bilayer films for hydrogen generation and solar cells applications 2019 the international journal of pure and applied analytical chemistry Amsterdam [u.a.] (DE-627)ELV003060667 volume:134 year:2015 day:1 month:03 pages:366-372 extent:7 https://doi.org/10.1016/j.talanta.2014.11.035 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U 53.56 Halbleitertechnologie VZ AR 134 2015 1 0301 366-372 7 045F 540 |
| allfields_unstemmed |
10.1016/j.talanta.2014.11.035 doi GBV00000000000192A.pica (DE-627)ELV018127576 (ELSEVIER)S0039-9140(14)00927-8 DE-627 ger DE-627 rakwb eng 540 540 DE-600 530 620 VZ 53.56 bkl Wu, Lijie verfasserin aut Integrated microwave processing system for the extraction of organophosphorus pesticides in fresh vegetables 2015transfer abstract 7 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier A simple and efficient integrated microwave processing system (IMPS) was firstly assembled and validated for the extraction of organophosphorus pesticides in fresh vegetables. Two processes under microwave irradiation, dynamic microwave-assisted extraction (DMAE) and microwave-accelerated solvent elution (MASE), were integrated for simplifying the pretreatment of the sample. Extraction, separation, enrichment and elution were finished in a simple step. The organophosphorus pesticides were extracted from the fresh vegetables into hexane with DMAE, and then the extract was directly introduced into the enrichment column packed with active carbon fiber (ACF). Subsequently, the organophosphorus pesticides trapped on the ACF were eluted with ethyl acetate under microwave irradiation. No further filtration or cleanup was required before analysis of the eluate by gas chromatography–mass spectrometry. Some experimental parameters affecting extraction efficiency were investigated and optimized, such as microwave output power, kind and volume of extraction solvent, extraction time, amount of sorbent, elution microwave power, kind and volume of elution solvent, elution solvent flow rate. Under the optimized conditions, the recoveries were in the range of 71.5–105.2%, and the relative standard deviations were lower than 11.6%. The experiment results prove that the present method is a simple and effective sample preparation method for the determination of pesticides in solid samples. A simple and efficient integrated microwave processing system (IMPS) was firstly assembled and validated for the extraction of organophosphorus pesticides in fresh vegetables. Two processes under microwave irradiation, dynamic microwave-assisted extraction (DMAE) and microwave-accelerated solvent elution (MASE), were integrated for simplifying the pretreatment of the sample. Extraction, separation, enrichment and elution were finished in a simple step. The organophosphorus pesticides were extracted from the fresh vegetables into hexane with DMAE, and then the extract was directly introduced into the enrichment column packed with active carbon fiber (ACF). Subsequently, the organophosphorus pesticides trapped on the ACF were eluted with ethyl acetate under microwave irradiation. No further filtration or cleanup was required before analysis of the eluate by gas chromatography–mass spectrometry. Some experimental parameters affecting extraction efficiency were investigated and optimized, such as microwave output power, kind and volume of extraction solvent, extraction time, amount of sorbent, elution microwave power, kind and volume of elution solvent, elution solvent flow rate. Under the optimized conditions, the recoveries were in the range of 71.5–105.2%, and the relative standard deviations were lower than 11.6%. The experiment results prove that the present method is a simple and effective sample preparation method for the determination of pesticides in solid samples. Fresh vegetables Elsevier Integrated microwave processing system Elsevier Organophosphorus pesticides Elsevier Gas chromatography–mass spectrometry Elsevier Song, Ying oth Hu, Mingzhu oth Xu, Xu oth Zhang, Hanqi oth Yu, Aimin oth Ma, Qiang oth Wang, Ziming oth Enthalten in Elsevier Science Mohamed, S.H. ELSEVIER Optical, water splitting and wettability of titanium nitride/titanium oxynitride bilayer films for hydrogen generation and solar cells applications 2019 the international journal of pure and applied analytical chemistry Amsterdam [u.a.] (DE-627)ELV003060667 volume:134 year:2015 day:1 month:03 pages:366-372 extent:7 https://doi.org/10.1016/j.talanta.2014.11.035 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U 53.56 Halbleitertechnologie VZ AR 134 2015 1 0301 366-372 7 045F 540 |
| allfieldsGer |
10.1016/j.talanta.2014.11.035 doi GBV00000000000192A.pica (DE-627)ELV018127576 (ELSEVIER)S0039-9140(14)00927-8 DE-627 ger DE-627 rakwb eng 540 540 DE-600 530 620 VZ 53.56 bkl Wu, Lijie verfasserin aut Integrated microwave processing system for the extraction of organophosphorus pesticides in fresh vegetables 2015transfer abstract 7 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier A simple and efficient integrated microwave processing system (IMPS) was firstly assembled and validated for the extraction of organophosphorus pesticides in fresh vegetables. Two processes under microwave irradiation, dynamic microwave-assisted extraction (DMAE) and microwave-accelerated solvent elution (MASE), were integrated for simplifying the pretreatment of the sample. Extraction, separation, enrichment and elution were finished in a simple step. The organophosphorus pesticides were extracted from the fresh vegetables into hexane with DMAE, and then the extract was directly introduced into the enrichment column packed with active carbon fiber (ACF). Subsequently, the organophosphorus pesticides trapped on the ACF were eluted with ethyl acetate under microwave irradiation. No further filtration or cleanup was required before analysis of the eluate by gas chromatography–mass spectrometry. Some experimental parameters affecting extraction efficiency were investigated and optimized, such as microwave output power, kind and volume of extraction solvent, extraction time, amount of sorbent, elution microwave power, kind and volume of elution solvent, elution solvent flow rate. Under the optimized conditions, the recoveries were in the range of 71.5–105.2%, and the relative standard deviations were lower than 11.6%. The experiment results prove that the present method is a simple and effective sample preparation method for the determination of pesticides in solid samples. A simple and efficient integrated microwave processing system (IMPS) was firstly assembled and validated for the extraction of organophosphorus pesticides in fresh vegetables. Two processes under microwave irradiation, dynamic microwave-assisted extraction (DMAE) and microwave-accelerated solvent elution (MASE), were integrated for simplifying the pretreatment of the sample. Extraction, separation, enrichment and elution were finished in a simple step. The organophosphorus pesticides were extracted from the fresh vegetables into hexane with DMAE, and then the extract was directly introduced into the enrichment column packed with active carbon fiber (ACF). Subsequently, the organophosphorus pesticides trapped on the ACF were eluted with ethyl acetate under microwave irradiation. No further filtration or cleanup was required before analysis of the eluate by gas chromatography–mass spectrometry. Some experimental parameters affecting extraction efficiency were investigated and optimized, such as microwave output power, kind and volume of extraction solvent, extraction time, amount of sorbent, elution microwave power, kind and volume of elution solvent, elution solvent flow rate. Under the optimized conditions, the recoveries were in the range of 71.5–105.2%, and the relative standard deviations were lower than 11.6%. The experiment results prove that the present method is a simple and effective sample preparation method for the determination of pesticides in solid samples. Fresh vegetables Elsevier Integrated microwave processing system Elsevier Organophosphorus pesticides Elsevier Gas chromatography–mass spectrometry Elsevier Song, Ying oth Hu, Mingzhu oth Xu, Xu oth Zhang, Hanqi oth Yu, Aimin oth Ma, Qiang oth Wang, Ziming oth Enthalten in Elsevier Science Mohamed, S.H. ELSEVIER Optical, water splitting and wettability of titanium nitride/titanium oxynitride bilayer films for hydrogen generation and solar cells applications 2019 the international journal of pure and applied analytical chemistry Amsterdam [u.a.] (DE-627)ELV003060667 volume:134 year:2015 day:1 month:03 pages:366-372 extent:7 https://doi.org/10.1016/j.talanta.2014.11.035 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U 53.56 Halbleitertechnologie VZ AR 134 2015 1 0301 366-372 7 045F 540 |
| allfieldsSound |
10.1016/j.talanta.2014.11.035 doi GBV00000000000192A.pica (DE-627)ELV018127576 (ELSEVIER)S0039-9140(14)00927-8 DE-627 ger DE-627 rakwb eng 540 540 DE-600 530 620 VZ 53.56 bkl Wu, Lijie verfasserin aut Integrated microwave processing system for the extraction of organophosphorus pesticides in fresh vegetables 2015transfer abstract 7 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier A simple and efficient integrated microwave processing system (IMPS) was firstly assembled and validated for the extraction of organophosphorus pesticides in fresh vegetables. Two processes under microwave irradiation, dynamic microwave-assisted extraction (DMAE) and microwave-accelerated solvent elution (MASE), were integrated for simplifying the pretreatment of the sample. Extraction, separation, enrichment and elution were finished in a simple step. The organophosphorus pesticides were extracted from the fresh vegetables into hexane with DMAE, and then the extract was directly introduced into the enrichment column packed with active carbon fiber (ACF). Subsequently, the organophosphorus pesticides trapped on the ACF were eluted with ethyl acetate under microwave irradiation. No further filtration or cleanup was required before analysis of the eluate by gas chromatography–mass spectrometry. Some experimental parameters affecting extraction efficiency were investigated and optimized, such as microwave output power, kind and volume of extraction solvent, extraction time, amount of sorbent, elution microwave power, kind and volume of elution solvent, elution solvent flow rate. Under the optimized conditions, the recoveries were in the range of 71.5–105.2%, and the relative standard deviations were lower than 11.6%. The experiment results prove that the present method is a simple and effective sample preparation method for the determination of pesticides in solid samples. A simple and efficient integrated microwave processing system (IMPS) was firstly assembled and validated for the extraction of organophosphorus pesticides in fresh vegetables. Two processes under microwave irradiation, dynamic microwave-assisted extraction (DMAE) and microwave-accelerated solvent elution (MASE), were integrated for simplifying the pretreatment of the sample. Extraction, separation, enrichment and elution were finished in a simple step. The organophosphorus pesticides were extracted from the fresh vegetables into hexane with DMAE, and then the extract was directly introduced into the enrichment column packed with active carbon fiber (ACF). Subsequently, the organophosphorus pesticides trapped on the ACF were eluted with ethyl acetate under microwave irradiation. No further filtration or cleanup was required before analysis of the eluate by gas chromatography–mass spectrometry. Some experimental parameters affecting extraction efficiency were investigated and optimized, such as microwave output power, kind and volume of extraction solvent, extraction time, amount of sorbent, elution microwave power, kind and volume of elution solvent, elution solvent flow rate. Under the optimized conditions, the recoveries were in the range of 71.5–105.2%, and the relative standard deviations were lower than 11.6%. The experiment results prove that the present method is a simple and effective sample preparation method for the determination of pesticides in solid samples. Fresh vegetables Elsevier Integrated microwave processing system Elsevier Organophosphorus pesticides Elsevier Gas chromatography–mass spectrometry Elsevier Song, Ying oth Hu, Mingzhu oth Xu, Xu oth Zhang, Hanqi oth Yu, Aimin oth Ma, Qiang oth Wang, Ziming oth Enthalten in Elsevier Science Mohamed, S.H. ELSEVIER Optical, water splitting and wettability of titanium nitride/titanium oxynitride bilayer films for hydrogen generation and solar cells applications 2019 the international journal of pure and applied analytical chemistry Amsterdam [u.a.] (DE-627)ELV003060667 volume:134 year:2015 day:1 month:03 pages:366-372 extent:7 https://doi.org/10.1016/j.talanta.2014.11.035 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U 53.56 Halbleitertechnologie VZ AR 134 2015 1 0301 366-372 7 045F 540 |
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English |
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Enthalten in Optical, water splitting and wettability of titanium nitride/titanium oxynitride bilayer films for hydrogen generation and solar cells applications Amsterdam [u.a.] volume:134 year:2015 day:1 month:03 pages:366-372 extent:7 |
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Enthalten in Optical, water splitting and wettability of titanium nitride/titanium oxynitride bilayer films for hydrogen generation and solar cells applications Amsterdam [u.a.] volume:134 year:2015 day:1 month:03 pages:366-372 extent:7 |
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Optical, water splitting and wettability of titanium nitride/titanium oxynitride bilayer films for hydrogen generation and solar cells applications |
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Wu, Lijie @@aut@@ Song, Ying @@oth@@ Hu, Mingzhu @@oth@@ Xu, Xu @@oth@@ Zhang, Hanqi @@oth@@ Yu, Aimin @@oth@@ Ma, Qiang @@oth@@ Wang, Ziming @@oth@@ |
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integrated microwave processing system for the extraction of organophosphorus pesticides in fresh vegetables |
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Integrated microwave processing system for the extraction of organophosphorus pesticides in fresh vegetables |
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A simple and efficient integrated microwave processing system (IMPS) was firstly assembled and validated for the extraction of organophosphorus pesticides in fresh vegetables. Two processes under microwave irradiation, dynamic microwave-assisted extraction (DMAE) and microwave-accelerated solvent elution (MASE), were integrated for simplifying the pretreatment of the sample. Extraction, separation, enrichment and elution were finished in a simple step. The organophosphorus pesticides were extracted from the fresh vegetables into hexane with DMAE, and then the extract was directly introduced into the enrichment column packed with active carbon fiber (ACF). Subsequently, the organophosphorus pesticides trapped on the ACF were eluted with ethyl acetate under microwave irradiation. No further filtration or cleanup was required before analysis of the eluate by gas chromatography–mass spectrometry. Some experimental parameters affecting extraction efficiency were investigated and optimized, such as microwave output power, kind and volume of extraction solvent, extraction time, amount of sorbent, elution microwave power, kind and volume of elution solvent, elution solvent flow rate. Under the optimized conditions, the recoveries were in the range of 71.5–105.2%, and the relative standard deviations were lower than 11.6%. The experiment results prove that the present method is a simple and effective sample preparation method for the determination of pesticides in solid samples. |
| abstractGer |
A simple and efficient integrated microwave processing system (IMPS) was firstly assembled and validated for the extraction of organophosphorus pesticides in fresh vegetables. Two processes under microwave irradiation, dynamic microwave-assisted extraction (DMAE) and microwave-accelerated solvent elution (MASE), were integrated for simplifying the pretreatment of the sample. Extraction, separation, enrichment and elution were finished in a simple step. The organophosphorus pesticides were extracted from the fresh vegetables into hexane with DMAE, and then the extract was directly introduced into the enrichment column packed with active carbon fiber (ACF). Subsequently, the organophosphorus pesticides trapped on the ACF were eluted with ethyl acetate under microwave irradiation. No further filtration or cleanup was required before analysis of the eluate by gas chromatography–mass spectrometry. Some experimental parameters affecting extraction efficiency were investigated and optimized, such as microwave output power, kind and volume of extraction solvent, extraction time, amount of sorbent, elution microwave power, kind and volume of elution solvent, elution solvent flow rate. Under the optimized conditions, the recoveries were in the range of 71.5–105.2%, and the relative standard deviations were lower than 11.6%. The experiment results prove that the present method is a simple and effective sample preparation method for the determination of pesticides in solid samples. |
| abstract_unstemmed |
A simple and efficient integrated microwave processing system (IMPS) was firstly assembled and validated for the extraction of organophosphorus pesticides in fresh vegetables. Two processes under microwave irradiation, dynamic microwave-assisted extraction (DMAE) and microwave-accelerated solvent elution (MASE), were integrated for simplifying the pretreatment of the sample. Extraction, separation, enrichment and elution were finished in a simple step. The organophosphorus pesticides were extracted from the fresh vegetables into hexane with DMAE, and then the extract was directly introduced into the enrichment column packed with active carbon fiber (ACF). Subsequently, the organophosphorus pesticides trapped on the ACF were eluted with ethyl acetate under microwave irradiation. No further filtration or cleanup was required before analysis of the eluate by gas chromatography–mass spectrometry. Some experimental parameters affecting extraction efficiency were investigated and optimized, such as microwave output power, kind and volume of extraction solvent, extraction time, amount of sorbent, elution microwave power, kind and volume of elution solvent, elution solvent flow rate. Under the optimized conditions, the recoveries were in the range of 71.5–105.2%, and the relative standard deviations were lower than 11.6%. The experiment results prove that the present method is a simple and effective sample preparation method for the determination of pesticides in solid samples. |
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Integrated microwave processing system for the extraction of organophosphorus pesticides in fresh vegetables |
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