气相色谱法测定保康茶叶中有机氯农药残留
目的 建立气相色谱法快速测定保康茶叶中8种有机氯农药残留的分析方法。方法 样品用正己烷超声提取, 经浓硫酸磺化反应对其净化除杂, 后用气相色谱-电子捕获检测器分离检测, 外标法定量。 结果 本方法对8种有机氯农药的检出限(limit of detection, LOD)为0.29~0.47 ng/mL, 线性相关性良好, r2在0.9991~0.9999之间, 方法加标回收率在82.7%~110.0%之间, 方法相对标准偏差(relative standard deviation, RSD)在1.11%~4.45%之间。结论 本方法简单快捷, 准确度和精密度高, 抗干扰能力强, 适用于茶叶中有机氯农药残留的定量检测。
Objective To establish a method for rapid determination of organochlorine pesticide residues in Baokang tea samples by gas chromatography. Methods The samples were extracted by n-hexane ultrasonic, purified by concentrated sulfuric acid reaction, separated and detected by gas chromatography-electron capture detector, and then quantified by external standard method. Results The limit of detection (LOD) of this method for 8 organochlorine pesticides was 0.29?0.47 ng/mL, with good linear correlation, and the recovery rates were 82.7%?110.0%, and relative standard deviations (RSDs) were 1.11%?3.88%. Conclusion This method is simple and fast, with high accuracy and precision and strong anti-interference ability, and it is suitable for the quantitative detection of organochlorine pesticide residues in tea.
标题：气相色谱法测定保康茶叶中有机氯农药残留
英文标题：Determination of organochlorine pesticide residues in Baokang tea samples by gas chromatography
作者：
石勤艳 湖北文理学院,食品科学技术学院
姚颖辉 湖北文理学院,食品科学技术学院
侯义德 湖北文理学院,食品科学技术学院
冯向阳 湖北文理学院,食品科学技术学院
李欢欢 湖北文理学院,食品科学技术学院
中文关键词:气相色谱法,有机氯农药,溶剂提取,磺化反应,茶叶,
英文关键词:gas chromatography,organochlorine pesticide,solvent extraction,sulfonation reaction,tea,
发表日期：2019-09-24
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