期刊
JOURNAL OF CHROMATOGRAPHY A
卷 1395, 期 -, 页码 160-166出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.chroma.2015.03.071
关键词
Nutraceuticals; Multi-residue methods; Green tea extracts; GC x GC-TOFMS
资金
- General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China [2012104002, 2013IK198]
- Graduate Innovation Fund of Shaanxi University of Science and Technology
A new analytical method was developed and validated for simultaneous analysis of 423 pesticides, isomers, and pesticide metabolites in nutraceutical products obtained from green tea (Camellia sinensis) extract. Response surface methodology was employed to optimize a generic extraction method. The automated extraction procedure was achieved in a simple disposable pipet extraction. Comprehensive two-dimensional gas chromatography with time-of-flight mass spectrometry was used for the separation and detection of all the analytes. The method was validated by taking into consideration the guidelines specified in European SANCO/12571/2013 Guideline 2013 and Commission Decision 2002/657/EC. The extraction recoveries were in a range of 81.6-113.0%, with coefficient of variation <6.4%. The limits of decision for the analytes are in the range 0.04-4.15 mu g kg(-1). The detection capabilities for the analytes are in the range 0.07-6.92 mu g. kg(-1). The 423 compounds behave dynamic in the range 0.1-200 mu g kg(-1) concentration, with correlation coefficient >0.99. This validated method has been successfully applied on screening of pesticide residues in one hundred and twenty-four different commercial nutraceutical products from green tea extract, and methamidophos, resmethrin, propoxur, tridemorph, ethiofencarb, flamprop isopropyl, furalaxyl, bifenthrin and fenpropathrin were detected in a few samples tested in this study. (C) 2015 Elsevier B.V. All rights reserved.
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