气相色谱法测定饮用水及其源水中灭草松和2,4-滴  

Determination of bentazone and 2,4-D in drinking water and source water by gas chromatography

作　　者：周珊[1] 雒丽娜[1] 马腾蛟[1] 赵立文[1] 

机构地区：[1]北京市疾病预防控制中心,北京100013

出　　处：《分析试验室》2007年第3期84-87,共4页Chinese Journal of Analysis Laboratory

摘　　要：采用气相色谱ECD检测器同时分离检测水中灭草松和2,4-滴两种农药。水样中灭草松和2,4-滴在酸性条件下经乙酸乙酯萃取,然后用碘甲烷溶液酯化,生成较易挥发的甲基酯类衍生物,用毛细管气相色谱-电子捕获检测器分离测定。对衍生方式、温度和时间进行了优化,分别使用ECD和FPD检测器测定灭草松,而ECD检测灵敏度高。本法的最低检测质量浓度为灭草松0.15μg/L,2,4-滴0.050μg/L。方法灵敏度和精密度均满足分析要求。Bentazone and 2,4-D herbicides in drinking water and source water were determined by gas chromatography with ECD detector. Acetic acetate was used to extract these two herbicides, followed by derivation with iodine meth- ane. Derivation method, temperature and time were optimized. Both ECD and FPD were both used to determine bentazone, showing that ECD has higher sensitivity. The lowest detectable concentration of bentazone and 2,4-D is 0.15 μg/L and 0.050μg/L respectively.

关 键 词：灭草松 2  4-滴 水源水和饮用水 气相色谱法 

分 类 号：O65[理学—分析化学]