Development of a novel analytical method of cartap and its application to the residue and dissipation analysis of cartap in paddy field

doi:10.3724/SP.J.1123.2015.12034

Abstract

Abstract:

Cartap has been widely used as a highly effective pesticide in rice fields for the control of rice stem borer and leaf folde. In this paper, a novel analytical method of cartap in rice plants, husked rice, rice hull, soil and water was developed by gas chromatography-flame photometric detector (GC-FPD). Cartap in these sample matrices was first extracted with dilute hydrochloric acid solution, and then derivatized to nereistoxin with nickel chloride (NiCl₂) under basic condition. At last, nereistoxin was extracted and concentrated by on-line combination of supported liquid-liquid extraction (SLE) and solid phase extraction (SPE). Under the optimal conditions, the recoveries of cartap in these sample matrices spiked at three levels ranged from 80.0% to 114.4% with relative standard deviations (RSDs) less than 13.7%, indicating good accuracy and precision of our proposed method. The proposed method was then applied to the analysis of residue and dissipation of cartap in rice plants, husked rice, rice hull, soil and water under field conditions. The results can provide reference for the establishment of the maximum residue level (MRL) of cartap and estimation of safety of pesticide application technology.

Key words: cartap, gas chromatography-flame photometric detector (GC-FPD), residue and dissipation, rice, supported liquid-liquid extraction (SLE)

CLC Number:

O658

PENG Xitian, XIA Hong, ZHANG Xian, HU Xizhou, PENG Lijun, SHEN Jing. Development of a novel analytical method of cartap and its application to the residue and dissipation analysis of cartap in paddy field[J]. Chinese Journal of Chromatography, 2016, 34(4): 436-441.

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