液液萃取-气相色谱-质谱法测定石化废水中二(2-乙基己基)己二酸酯  

Determination of di(2-ethylhexyl)adipate in petrochemical wastewater by liquid-liquid extraction-gas chromatography-mass spectrometry

作　　者：席宏波[1,2] 陈婷婷 于茵[1,2] 周岳溪[1,2] XI Hongbo;CHEN Tingting;YU Yin;ZHOU Yuexi(State Key Laboratory of Environmental Criteria and Risk Assessment,Chinese Research Academy of Environmental Sciences,Beijing 100012,China;Research Center of Environmental Pollution Control Engineering Technology,Chinese Research Academy of Environmental Sciences,Beijing 100012,China;School of Chemical and Environmental Engineering,China University of Mining and Technology(Beijing),Beijing 100083,China)

机构地区：[1]中国环境科学研究院环境基准与风险评估国家重点实验室,北京100012 [2]中国环境科学研究院环境污染控制工程技术研究中心,北京100012 [3]中国矿业大学(北京)化学与环境工程学院,北京100083

出　　处：《化工环保》2021年第4期513-517,共5页Environmental Protection of Chemical Industry

基　　金：国家水体污染控制与治理科技重大专项(2017ZX-07402-002)。

摘　　要：建立了液液萃取—气相色谱-质谱法测定石化废水中二(2-乙基己基)己二酸酯(DEHA)的新方法。优化的液液萃取条件为:萃取剂乙酸乙酯,水样调成酸性(pH<2),每次加入萃取剂0.1 mL/mL、盐析剂NaCl 0.15 g/mL,萃取6次,每次萃取时间2 min,氮吹浓缩水浴温度35℃。实验结果表明:在质量浓度0.1~100 mg/L的范围内,校准曲线的线性关系良好;检出限为0.15μg/L,定量限为0.5μg/L,加标回收率为93%~101%,相对标准偏差(n=7)小于2.9%。本法适用于石化废水中DEHA的测定。A new method of liquid-liquid extraction-gas chromatography-mass spectrometry for determination of di(2-ethylhexyl)adipate(DEHA)in petrochemical wastewater was developed.The optimized conditions of liquid-liquid extraction are as follows:the extraction solvent isethyl acetate,thewater sample is adjusted to acidic(pH<2),the extractant amount is 0.1 mL/mL,the salting-out agent NaCl amount is 0.15 g/mL,the extraction number is 6 times,each extraction time is 2 min,and the water bath temperature for concentration with nitrogen is 35℃.The experimental results indicate that:The calibration curve has a good linear relationship within the mass concentration range of 0.1-100 mg/L;The detection limit is 0.15μg/L,the quantification limit is 0.5μg/L,and the standard recovery rate is 93%-101%,with the relative standard deviate(RSD)less than 2.9%(n=7).This method can be used for determination of DEHA in petrochemical wastewater.

关 键 词：液液萃取 气相色谱-质谱 二(2-乙基己基)己二酸酯 盐析剂 乙酸乙酯 

分 类 号：X703[环境科学与工程—环境工程]