Determination of Organophosphorus Pesticide Residues in Winter Bamboo Shoots by Homogenate Extraction Coupled with Gas Chromatography-Flame Photometric Detector
Zhu Yu-Xin
School of Cross-Border Electronic Commerce/School of Science and Technology, Zhejiang International Studies University, Hangzhou, Zhejiang, 310023, China.
Xu Liu-Yue
School of Cross-Border Electronic Commerce/School of Science and Technology, Zhejiang International Studies University, Hangzhou, Zhejiang, 310023, China.
Feng Qi *
School of Cross-Border Electronic Commerce/School of Science and Technology, Zhejiang International Studies University, Hangzhou, Zhejiang, 310023, China.
Zhu Miao-Qin
School of Cross-Border Electronic Commerce/School of Science and Technology, Zhejiang International Studies University, Hangzhou, Zhejiang, 310023, China.
*Author to whom correspondence should be addressed.
Abstract
Excessive use of organophosphorus pesticides (OPPs) in fruits and vegetables may affect human health. In this paper, a simple, rapid and effective method for the determination of five OPPs in winter bamboo shoots by gas chromatography-flame photometric detector (GC-FPD) was developed. Three extractants and three extraction methods were examined respectively. The results showed that the recovery rate was higher when the samples were extracted by acetonitrile and treated with homogenate extraction method. Under the optimized conditions, recoveries ranged from 82.12% to 91.48% with the relative standard deviation (RSD) of 1.51-4.20% and the limit of detection (LOD) of 0.005-0.02 μg/mL. Results showed that using acetonitrile as extractants and homogenate extraction in sample preparation is an effective method in determination of pesticide residues in winter bamboo shoots.
Keywords: Organophosphorus pesticides, winter bamboo shoots, gas chromatography, acetonitrile, homogenate extraction.