气相色谱法测定水环境中甲苯及硝基苯类化合物含量

摘要

采用正己烷萃取,气相色谱法测定水中甲苯、硝基苯、邻硝基甲苯、间硝基甲苯、对硝基甲苯.方法在6.25~100μg/L范围内线性良好,检出限为0.2~0.25μg/L.标准溶液平行测定的RSD≤10.0%,加标回收率分别为80%~114%.方法简便快速,可用于实际样品的检测.%A gas-chromatography method for determination of toluene ,nitrobenzene ,o-nitrotoluene , m-nitrotoluene ,p-nitrotoluene in water was established and the extraction was n-hexane. The linearity was excellent in the scope of 6. 25-100 μg/L. The method determination limits were 0. 2-0. 25 μg/L. The relative standard deviations(RSD)were less than 10%. The spiked recovery rates came to be 80%-114%.The method was simple and fast ,it was suitable for the determination of samples.