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Dissipation of Flonicamid in Honeysuckle and Its Transfer during Brewing Process.

Authors
  • Wang, Yujie1
  • Xue, Jian1
  • Jin, Hongyu2
  • Ma, Shuangcheng2
  • 1 Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College.
  • 2 National Institutes for Food and Drug Control.
Type
Published Article
Journal
Chemical and Pharmaceutical Bulletin
Publisher
Pharmaceutical Society of Japan
Publication Date
May 01, 2017
Volume
65
Issue
5
Pages
492–497
Identifiers
DOI: 10.1248/cpb.c16-01015
PMID: 28320974
Source
Medline
Keywords
License
Unknown

Abstract

The dissipation of flonicamid in Honeysuckle and transfer pattern from Honeysuckle to its tea infusion were investigated. Flonicamid was applied on Honeysuckle crop at two dosages, 60 g of active gradient per hectare (g a.i. hm-2) and 180 g a.i. hm-2 (recommended and triple the recommended) in Fenqiu, Henan Province in 2015 and 2016. Gas Chromatography-Electron Capture Detector (GC-ECD) detection methods were developed for the analysis of flonicamid residues in honeysuckles and its infusion. The recoveries in both honeysuckles and its infusion ranged from 81.5 to 101.7% with relative standard deviations (RSDs) of 3.2-9.1%. The dissipations of flonicamid in Honeysuckle were found to follow the first order kinetics with half-life ranging between 2.8 and 3.2 d. After recommended dose pesticide application, contents of flonicamid residues were lower than theoretical maximum residue limit (tMRL). Flonicamid residues can easily transfer from Honeysuckle to its tea infusion and transfer rates of flonicamid decrease with the brewing temperature reduction or the brewing times increase. These results are helpful to establish maximum residue limit and develop guidance on the appropriate and secure use of flonicamid in Honeysuckle.

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