乙二醇生产废水中特征污染物含量的测定

建立了气相色谱(氢火焰离子化检测器)检测乙二醇生产废水中乙二醇、二乙二醇、三乙二醇含量的新方法。该方法采用HP-FFAP型毛细管色谱柱，优化的色谱条件为:进样口温度230℃，初始柱温50℃，载气流量1.0mL/min，分流比1∶1。在质量浓度为1.0~150.0mg/L范围内，废水中各组分色谱峰面积与浓度呈良好的线性关系，相关系数均在0.9989~0.9996之间;相对标准偏差均小于2.0％;乙二醇、二乙二醇、三乙二醇的最低检出限分别为0.63，0.21，0.25mg/L，加标回收率为97.72％~103.52％。

Determination of Characteristic Pollutants in Ethylene Glycol Production Wastewater

A new method for determination of ethylene glycol,diethylene glycol and triethylene glycol in ethylene glycol production wastewater by GC-FID was established. A HP-FFAP capillary column is used in the method. The optimum GC conditions are as follows: injector temperature 230 ℃,initial column temperature 50 ℃,carrier gas flow 1.0 mL/min,split ratio 1;1. In the mass concentration range of 1.0-150.0 mg/L,there are good linearity relationships between the GC peak area and the mass concentrations of components in the wastewater with 0.998 9-0.999 6 of correlation coefficient; The relative standard deviations of this method are all less than 2.0% (n=7);The lowest detection limits of ethylene glycol,diethylene glycol and triethylene glycol are 0.63,0.21 0.25 mg/L respectively and the standard addition recoveries are 97.72%-103.52%.