Journal
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
Volume 64, Issue 46, Pages 8935-8943Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jafc.6b03253
Keywords
fluxapyroxad; metabolites; QuEChERS; UPLC-MS/MS
Funding
- National Key Research and Development Program of China [2016YFD0200204]
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Qualitative analysis and quantification of pesticide residues in foodstuff are essential to our health in daily life, especially regarding their metabolites, which may be more toxic and persistent. Thus, a valid analytical measure for detection of fluxapyroxad and its three metabolites (M700F002 (C-2), M700F008 (C-8), M700F048 (C-48)) in vegetables (cucumber, tomato, and pepper), fruits (grape, apple), and cereals (wheat, rice) was developed by UPLC-MS/MS with negative ion mode. The target compounds were extracted by acetonitrile contain 0.2% formic acid (v/v), and the extractions were cleaned up by octadecylsilane sorbents. The limits of quantitation and quantification were less than 0.14 mu g kg(-1) and 0.47 mu g kg(-1) in seven matrices. Furthermore, recoveries at levels of 0.01, 0.05, and 0.1 mg kg(-1) ranged from 74.9% to 110.5% with relative standard deviations <= 15.5% (n = 5). The method is validated to be effective and robust for the routine supervising of fluxapyroxad and its metabolites.
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