阀切换-离子色谱法测定1,2-环氧丁烷产品中有机酸  

Determination of organic acids in 1,2-butylene oxide products by valve switch-ion chromatography

作　　者：许竞早[1] 彭振磊[1] 张育红[1] 王川[1] 金国杰[1] XU Jingzao;PENG Zhenlei;ZHANG Yuhong;WANG Chuan;JIN Guojie(SINOPEC Shanghai Research Institute of Petrochemical Technology,Shanghai 201208,China)

机构地区：[1]中国石化上海石油化工研究院,上海201208

出　　处：《色谱》2018年第4期376-380,共5页Chinese Journal of Chromatography

摘　　要：建立了阀切换-离子色谱法测定1,2-环氧丁烷(1,2-BO)产品中有机酸(甲酸、乙酸和丙酸)的方法。样品经乙醇稀释后,通过阀切换技术,有机酸被IonPac TAC-ULP1捕集柱捕集,然后进入IonPac AS11分析柱分离,并由电导检测器检测。结果表明:甲酸、乙酸和丙酸均能实现较好地分离,在各自的范围内其色谱峰面积呈现良好的线性关系。实际样品的加标回收率为92.5%~111.8%,相对标准偏差小于5.6%(n=3),检出限为0.60~4.80μg/L。该方法具有前处理简单、快速、准确等特点,适用于不溶于水的有机体系中有机酸的分析。A novel analytical method was developed for the determination of organic acids(formic acid,acetic acid and propionic acid)in 1,2-butylene oxide(1,2-BO)products by valve switch-ion chromatography(IC).The samples were diluted in ethanol,and then were eluted from a concentrator column(IonPac TAC-ULP1)to an analytical column(IonPac AS11).The extracts were detected by a suppressed conductivity detector.Formic acid,acetic acid and propionic acid were separated well.Good linear relationships for the three organic acids were obtained.The spiked recoveries of the three organic acids in the samples were in the range of 92.5%-111.8%.The relative standard deviations(RSDs)were less than 5.6%(n=3).The limits of detection(LODs,S/N=3)of the formic acid,acetic acid and propionic acid were 0.60-4.80μg/L.The method is simple,rapid,and accurate,and is suitable for the determination of the organic acids in an insoluble organic system.

关 键 词：离子色谱 阀切换 有机酸 1 2-环氧丁烷 

分 类 号：O658[理学—分析化学]