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。
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.
作者
石勤艳
姚颖辉
侯义德
冯向阳
李欢欢
SHI Qin-Yan;YAO Ying-Hui;HOU Yi-De;FENG Xiang-Yang;LI Huan-Huan(School of Food Science and Technology,Hubei University of Arts and Science,Xiangyang 441053,China)
出处
《食品安全质量检测学报》
CAS
2020年第1期158-164,共7页
Journal of Food Safety and Quality
基金
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).
关键词
气相色谱法
有机氯农药
溶剂提取
磺化反应
茶叶
gas chromatography
organochlorine pesticide
solvent extraction
sulfonation reaction
tea
作者简介
石勤艳,主要研究方向为食品安全检测技术。E-mail:1981538944@qq.com;通讯作者:李欢欢,硕士,工程师,主要研究方向为农产品质量安全检测。E-mail:754806317@qq.com
