气相色谱法测定2-氯-5-氯甲基吡啶废水中N,N-二甲基甲酰胺含量

GC Determination of N,N-Dimethylformamide in Waste Water

采用3%聚乙二醇20000/Chromosorb W AW DMCS(40～60μm)的玻璃填充柱,以正戊醇为内标物,在进样口温度230℃、检测器温度230℃、柱温200℃和载气(氮气)流速40mL/min的色谱条件下进行分离,用氢焰离子化检测器对生产2-氯-5-氯甲基吡啶的废水中所含N,N-二甲基甲酰胺进行定量分析。该分析方法的标准偏差为0.04,变异系数为1.26%,平均回收率为99.57%,线性相关系数为:0.9999。

The quantitative analysis of N,N-dimethylformamide was determined by GC with 3% polyethylene glycol 20000/Chromosorb W AW DMCS （40 to 60 μm） glass column, and by using n-pentanol as internal standard. Separation was conducted at a input port temperature of 230℃, a detector temperature of 230℃, a column temperature of 200℃, and a carrier gas （nitrogen） flow rate of 40 mL/min using FID detector to quantitative analysis N,N-dimethylformamide. The standard deviation was 0.04, variation coefficient was 1.26%, average recovery was 99.57%, liner correlation was 0.999 9.