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Utilizing a novel sorbent in the solid phase extraction for simultaneous determination of 15 pesticide residues in green tea by GC/MS.
Huo, Feifei; Tang, Hua; Wu, Xue; Chen, Dazhou; Zhao, Tan; Liu, Pei; Li, Lei.
Afiliación
  • Huo F; State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China; Beijing Key Laboratory of Environmentally Harmful Chemical Analysis, Beijing University of Chemical Technology, Beijing 100029, China.
  • Tang H; Division of Metrology in Chemistry, National Institute of Metrology, Beijing 100013, China.
  • Wu X; Division of Metrology in Chemistry, National Institute of Metrology, Beijing 100013, China.
  • Chen D; Division of Metrology in Chemistry, National Institute of Metrology, Beijing 100013, China.
  • Zhao T; State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China; Beijing Key Laboratory of Environmentally Harmful Chemical Analysis, Beijing University of Chemical Technology, Beijing 100029, China.
  • Liu P; State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China; Beijing Key Laboratory of Environmentally Harmful Chemical Analysis, Beijing University of Chemical Technology, Beijing 100029, China.
  • Li L; State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China; Beijing Key Laboratory of Environmentally Harmful Chemical Analysis, Beijing University of Chemical Technology, Beijing 100029, China. Electronic address: lilei@mail.buct.edu.cn.
J Chromatogr B Analyt Technol Biomed Life Sci ; 1023-1024: 44-54, 2016 Jun 15.
Article en En | MEDLINE | ID: mdl-27183089
Pesticide residues exceeding standard in green tea is a widespread problem of the world's attention, containing organochlorine pesticides (OCPs), organophosphorus pesticides (OPPs), and pyrethroids. In this research, three dimensionally honeycomb Mg-Al layered double oxide (TDH-Mg-Al-LDO) combined with graphitized carbon black (GCB), packed as a column, was used as a novel solid phase extraction sorbent, applying in simultaneous determination of 15 pesticide residues in green tea coupled with GC-MS. Compared with different type of SPE column, it showed that TDH-Mg-Al-LDO exhibited great advantages in the extraction of 15 pesticide residues from green tea, which was seldom reported before. Different experiment conditions, such as combination order of Mg-Al-LDO and GCB, dosage of sorbents, type and volume of eluting solvent were thoroughly studied and optimized. The limits of detection (LODs) of 15 pesticides ranged from 0.9 to 24.2ng/g and the limits of quantifications (LOQs) were ranging from 3.0 to 80.0ng/g. The recoveries using this method at three spiked concentration levels (10, 100 and 500ng/g for Fenthion, P,P'-DDE, O,P'-DDT, P,P'-DDD and Bifenthrin, 100, 500 and 2000ng/g for the others) range from 71.1 to 119.0%. The relative standard deviation (RSD) was from 0.1 to 7.6% in all case. The result indicated that the proposed analytical method had been successfully applied for the simultaneous determination of 15 pesticide residues in commercial green tea.
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Texto completo: 1 Base de datos: MEDLINE Asunto principal: Té / Residuos de Plaguicidas / Extracción en Fase Sólida Idioma: En Revista: J Chromatogr B Analyt Technol Biomed Life Sci Asunto de la revista: ENGENHARIA BIOMEDICA Año: 2016 Tipo del documento: Article

Texto completo: 1 Base de datos: MEDLINE Asunto principal: Té / Residuos de Plaguicidas / Extracción en Fase Sólida Idioma: En Revista: J Chromatogr B Analyt Technol Biomed Life Sci Asunto de la revista: ENGENHARIA BIOMEDICA Año: 2016 Tipo del documento: Article