气相色谱法同时测定废气中的丙酮和丁酮

建立了用气相色谱法测定废气中丙酮和丁酮的方法。废气中丙酮和丁酮活性炭吸附,二硫化碳解吸,NNOWAX毛细管柱分离,直接进样分析,氢火焰离子化检测器检测,时间定性,峰面积定量,其丙酮回收率为91.6%～103.5%,丁酮回收率为90.2%～104.3%,当采样体积为30L,丙酮和丁酮最低检出质量浓度为0.001mg/m3。本方法前处理简便,分离度好干扰少,分析灵敏度高,有机试剂使用量少,满足环境分析要求。

Determination of Acetone and Methyl Ethyl Ketone in Exhaust Gas by Chromatographic Method

The method to test acetone and methyl ethyl ketone in waste gas by chromatographic method was established in this study.Acetone and methyl ethyl ketone in waste gas adsorption of activated carbon,carbon disulfide desorption,NNOWAX separated by capillary column,direct injection analysis,hydrogen flame ionization detector,time is qualitative,quantitative peak area,the acetone recovery rate was 91.6%~103.5%,methyl ethyl ketone recovery rate was 90.2%~104.3%.When the sampling volume is 30L,the minimum detectable concentration of acetone and methyl ethyl ketone are 0.001mg/m3.The advantages of this method are easy pretreatment,good separation with little interference,high analysis sensitivity,little organic reagents dosage and meeting the environmental analysis requirements.