| 气相色谱法测定保康茶叶中有机氯农药残留 |
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| 引用本文： | 石勤艳,姚颖辉,侯义德,冯向阳,李欢欢.气相色谱法测定保康茶叶中有机氯农药残留[J].食品安全质量检测技术,2020,11(1):158-164. |
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| 作者姓名： | 石勤艳 姚颖辉 侯义德 冯向阳 李欢欢 |
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| 作者单位： | 湖北文理学院, 食品科学技术学院,湖北文理学院, 食品科学技术学院,湖北文理学院, 食品科学技术学院,湖北文理学院, 食品科学技术学院,湖北文理学院, 食品科学技术学院 |
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| 基金项目： | 湖北省高等学校实验室研究项目(HBSY2018-33)、湖北文理学院科研基金项目(2020170329, 2018kypygp001)、湖北文理学院教学研究项目(JY2018044) |
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| 摘 要： | 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。
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| 关 键 词： | 气相色谱法 有机氯农药 溶剂提取 磺化反应 茶叶 |
| 收稿时间： | 2019/9/24 0:00:00 |
| 修稿时间： | 2019/12/16 0:00:00 |
Determination of organochlorine pesticide residues in Baokang tea samples by gas chromatography |
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| SHI Qin-Yan,YAO Ying-Hui,HOU Yi-De,FENG Xiang-Yang and LI Huan-Huan.Determination of organochlorine pesticide residues in Baokang tea samples by gas chromatography[J].Food Safety and Quality Detection Technology,2020,11(1):158-164. |
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| Authors: | SHI Qin-Yan YAO Ying-Hui HOU Yi-De FENG Xiang-Yang and LI Huan-Huan |
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| Affiliation: | School of Food Science and Technology, Hubei University of Arts and Science,School of Food Science and Technology, Hubei University of Arts and Science,School of Food Science and Technology, Hubei University of Arts and Science,School of Food Science and Technology, Hubei University of Arts and Science and School of Food Science and Technology, Hubei University of Arts and Science |
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| Abstract: | 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. |
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| Keywords: | gas chromatography organochlorine pesticide solvent extraction sulfonation reaction tea |
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