气质联用法检测煤气化废水中酚类化合物

Determination of phenolic compounds in wastewater of coal gasification by Gas Chromatography-Mass Spectrometer

鲁奇加压气化废水中含有大量酚类化合物，分析酚类物质种类和含量对处理这类废水有指导意义。通过将水样溶于丙酮，使用无水硫酸钠小柱除去丙酮溶液中水分的方法对水样进行处理，前处理方法简单方便。使用GC-MS定性分析水样中酚类，并建立了8种酚类目标物的定量分析方法。结果表明，在0．2～20mg／L的范围内线性良好，回收率在72％-105％之间，相对标准偏差（n=3）为1．4％-7．9％。该方法简单可靠，适用于测定煤气化废水中酚类物质的含量。

The wastewater of coal gasification contains lots of phenolic compounds. The analysis and quantitative detection of phenolic compounds are of guiding significance to deal with this wastewater. A simple pretreatment method is employed to dispose the water samples, which use acetone to dissolve the water samples and pillar loaded of anhydrous sodium sulfate to remove the water in the liquid. Gas Chromatography-Mass Spectrometer （ GC-MS ） is then used to qualitatively analyze phenolic compounds in the water samples. The quantitative analysis method for 8 phenolic compounds is established as well. The linearity within the scope of 0. 2 - 20 mg/L is good. The recoveries are between 72% - 105% with the RSDs in the range of 1.4% -8.9%. This method is simple and reliable,which is suitable for the determination of nhenolic comnounds in wasterwater of coal gasification.