Analysis of pesticide residuals in tea water samples by hollow fiber liquid-phase microextraction and gas chromatography with mass spectrometric detection and electron caption detection
作者单位：Department of Chemistry National Chung-Hsing UniversityTaichung 402TaiwanChina
会议名称：《30th International Symposium on Capillary Chromatography、4th GC×GC Symposium、16th National Symposium and Exhibition on Chromatography,i.e. 1st Dalian International Symposium and Exhibition on Chromatography》
会议日期：2007年
学科分类：082803[工学-农业生物环境与能源工程] 08[工学] 0828[工学-农业工程] 0804[工学-仪器科学与技术]
关 键 词：Microdialysis GC/MS GC/ECD Pesticide Tea
摘 要：正Microdialysis sampling was investigated as a liquid-phase microextraction in the analysis of pesticide residual in tea water before GC/MS and GC/ECD *** pesticides,including bromopropylate, chiorfenapyr,chlorpyrifos,ethion and procymidone in tea water samples,were enriched in the LPME solvent by diffusing through a hollow fiber membrane under the optimal *** the extraction process of LPME, the extraction solvent was withdrew with micro-syringe plug and then injected into GC/MS and GC/ECD system for separation and *** affecting the efficiency of hollow-fiber protected LPME,such as extraction solvent,pH of tea samples,salt addition and extraction time,were investigated in detail to obtain an optimum *** results indicated that the extraction of 50 mL tea water,with a 17-cm length of membrane fiber and hexane as extraction solvent for 30 min achieved the best extraction efficiency of more than 80% recovery and less than 9% *** real samples were obtained from supermarket,and some of pesticides were measured in the amounts varied from 10.5-92μg/*** proposed method provided a simple and rapid procedure to collect pesticides from tea water samples by only using a few organic solvent.