气相色谱-质谱法检测生活饮用水中乙草胺  

Determination of Acetochlor in Drinking Water by Gas Chromatography-Mass Spectrometry

作　　者：叶小莉 倪一平 朱波[1] 赖璟琦[1] YE Xiaoli;NI Yiping;ZHU Bo;LAI Jingqi(Shenzhen Luohu Center for Disease Prevention and Control,Shenzhen 518020,China)

机构地区：[1]深圳市罗湖区疾病预防控制中心,广东深圳518020

出　　处：《食品安全导刊》2024年第36期79-81,86,共4页China Food Safety Magazine

摘　　要：目的:采用气相色谱-质谱法检测生活饮用水中的乙草胺。方法:取500 mL生活饮用水经固相萃取装置进行富集净化,洗脱液浓缩至1.0 mL,用气相色谱-质谱联用仪测定。通过实验探讨4种固相萃取小柱、不同洗脱溶剂及不同用量的分析效果。结果:乙草胺在1~250 μg·L^(-1)线性关系良好,相关系数为0.999 8;500 mL水样中乙草胺的最低检测质量浓度为0.002 μg·L^(-1);加标回收率在90.00%~98.25%,相对标准偏差在1.68%~2.82%。结论:该方法检测饮用水中乙草胺具有较高的灵敏度、精密度和准确度。Objective:To determine acetochlor in drinking water by gas chromatography-mass spectrometry.Method:Take 500 mL of drinking water and enrich and purify it through a solid phase extraction device,concentrate the eluent to 1.0 mL,and determine it with a gas chromatography-mass spectrometry instrument.The experimental study explored the analytical effects of four types of solid phase extraction columns,different elution solvents,and different dosages.Result:Acetochlor has a good linear relationship within the range of 1 μg·L~(-1) to 250 μg·L~(-1),with a correlation coefficient of 0.999 8.The minimum detection concentration of acetochlor in a 500 mL water sample is 0.002 μg·L~(-1);the spiked recovery rate is between 90.00% and 98.25%,and the relative standard deviation is between 1.68% and 2.82%.Conclusion:This method has high sensitivity,precision,and accuracy for the detection of acetochlor in drinking water.

关 键 词：乙草胺 气相色谱-质谱法 固相萃取 生活饮用水 

分 类 号：R123.1[医药卫生—环境卫生学] O657.63[医药卫生—公共卫生与预防医学]