便携式气相色谱/质谱联用快速测定固定污染源废气中的挥发性卤代烃研究

建立了便携式GC-MS快速测定固定污染源废气中挥发性卤代烃方法,26种卤代烃内标定量工作曲线的相关系数r≥0.985,线性关系良好;精密度好,相对标准偏差2.33%～18.1%;准确度高,加标回收率为101%～134%;方法检出限为0.002 ppm～0.016 ppm.在实际现场监测固定污染源中挥发性卤代烃时,使用便携式GC-MS的速查(Survey)功能初步判断样品浓度,确定稀释倍数,并验证了气袋和玻璃注射器采样对挥发性卤代烃测定结果无显著性差异.

Determination of Volatile Halogenated HydrocarbonsinStationary Pollution Source with GC-MS

This study established portable GC-MS rapid determination method of for volatile alkylhalides in waste gas of stationary pollution sources, established the 26 kinds of halogenated hydrocarbon standard working curve of the quantitative, curve correlation coefficient r is greater than or equal to 0.985.It shows good linear relationship, good precision, the relative standard deviation 2.33%～18.1%;high accuracy.Accuracy is high, and the recovery rate is 101%～134%.The detection limit is 0.002ppm～0.016ppm.In volatile halogenated hydrocarbons in actual on-site monitoring of stationary pollution sources, the use of portable GC-MS info(survey)function preliminary judgment sample concentration, determine the amount of diluted, and verify the sampling of volatile halogenated hydrocarbons showed that there was no significant difference of air bag and glass syringes.