液液萃取—气相色谱-质谱法测定丙烯酸生产废水中的特征污染物

Determination of Particular Pollutants in Acrylic Acid Production Wastewater by Liquid-Liquid Extraction-Gas Chromatography-Mass Spectrometry

建立了液液萃取—气相色谱-质谱法快速测定丙烯酸生产废水中苯系物、酯类、醇类、醛类和酮类等12种半挥发性有机物的分析方法.液液萃取条件为：以二氯甲烷为萃取剂,废水pH 7,分散剂甲醇加入量10 mL/L,盐析剂NaC1加入量300 g/L.各组分的工作曲线的线性关系良好.各组分的加标回收率为95.2％～116.0％,各组分的方法检出限为0.001～ 0.179 μg/L,相对标准偏差均小于3.5％.该方法可用于丙烯酸生产废水中主要特征有机物的快速定量检测.

The liquid-liquid extraction-gas chromatography-mass spectrometry method for rapid determination of 12 kinds of semi-volatile organic pollutants in the acrylic acid production wastewater,including benzene,alcohols,esters,aldehydes,ketones,were established.The conditions of liquid-liquid extraction are as follows：Using dichloromethane as extractant,wastewater pH 7,methanol dosage 10 mL/L,NaC1 dosage 300 g/L.The calibration curves show good linear relationship.The recoveries of standard addition are 95.2％-116.0％,the detection limits of the method are 0.001-0.179 μg/L,and the relative standard deviations are all less than 3.5％.This method can be used for rapid quantitative determination of particular pollutants in acrylic acid production wastewater.