1 research outputs found
Water-Based Extraction and Liquid Chromatography–Tandem Mass Spectrometry Analysis of Neonicotinoid Insecticides and Their Metabolites in Green Pepper/Tomato Samples
This paper proposes an environmentally
friendly method involving
water-based extraction of the samples, cleanup of the extracts by
solid-phase extraction, and subsequent liquid chromatography coupled
with tandem mass spectrometry, which was used for simultaneous determination
of seven hydrophilic neonicotinoid insecticides as well as their metabolites
in agricultural samples. The effects of sample matrix on detection
of the target compounds were negligibly small. Mean recoveries obtained
at spiked concentrations between 0.01 and 1.00 mg/kg were 71.2–122.3%
with relative standard deviations of ≤7.5%. When the method
was applied to crop samples sprayed with commercial formulations of
the target compounds, the residual concentrations of the compounds
determined by the proposed method (0.015–0.27 mg/kg in green
peppers and 0.017–0.31 mg/kg in tomatoes) were equivalent to
those determined by the official Japanese method (0.017–0.26
mg/kg in green peppers and 0.013–0.30 mg/kg in tomatoes)