极谱法检测环境水体中的全氟辛烷磺酸  

Determination of Perfluorooctane Sulfonic Acid in Environmental Water by Polarography

作　　者：高燕梅 陈文[1,2] 张之琛 GAO Yanmei;CHEN Wen;ZHANG Zhichen(College of Materials and Chemistry&Chemical Engineering,Chengdu University of Technology,Chengdu 610059;Mineral Resources Chemistry Key Laboratory of Sichuan Higher Education Institution,Chengdu 610059)

机构地区：[1]成都理工大学材料与化学化工学院,四川成都610059 [2]四川省矿产资源化学高校重点实验室,四川成都610059

出　　处：《分析科学学报》2022年第3期297-302,共6页Journal of Analytical Science

摘　　要：本研究基于盐酸小檗碱(Berberine Hydrochloride,BBR)在pH=6.09的B-R缓冲溶液中,于-1.3~-1.4 V(vs.SCE)电位范围有一灵敏的还原峰,而全氟辛烷磺酸(Perfluorooctane Sulphonate,PFOS)与BBR可通过静电作用形成离子缔合物,减少溶液中可还原的BBR,导致溶液峰电流下降,其峰电流的变化值在PFOS浓度范围为0.2~60μmol/L时,呈良好的相关性,据此建立了单扫描极谱法检测PFOS的新方法,方法检测限为0.13μmol/L。对于实际样品的分析测定,回收率在95.00%~105.50%之间,满足分析要求。本法分析成本低,操作方法、快捷、较灵敏,可以选择作为水样中PFOS快速检测的方法之一。A method for the determination of perfluorooctane sulphonate(PFOS) by polarography is established in this study.It is based on the fact that berberine hydrochloride(BBR) has a sensitive reduction peak in the potential range of-1.3 to-1.4 V(vs.SCE) in the B-R buffer solution and an ion association complex is formed between PFOS and BBR through electrostatic interaction, which result in the decrease of concentration of reducible BBR and its peak current.The peak current has negative correlation with the concentration of PFOS over the range of 0.2-60 μmol/L,and the detection limit is 0.13 μmol/L.The recovery is 95.00%-105.50% when this method is used to analyze the actual samples, which meets the analysis requirements.With the advantages of low cost, flexibility, and good responsiveness, this method can be selected as one of the methods for rapid determination of PFOS in water samples.

关 键 词：极谱法 全氟辛烷磺酸 持久性有机污染物 

分 类 号：O657.14[理学—分析化学]