微乳液介质-雷氏盐浊度法测定汞的研究  

Nephelometric Determination of Mercury as Its Reinecke Salt in a Microemulsion Medium

作　　者：杜斌[1] 魏琴[1] 赵侠[1] 俞惟乐[2] 欧庆瑜[2] 

机构地区：[1]山东建材学院应化系,济南250022 [2]中国科学院兰州化学物理研究所,兰州730000

出　　处：《分析测试学报》1997年第6期33-36,共4页Journal of Instrumental Analysis

基　　金：山东大学胶体与界面化学国家教委开放实验室的资助

摘　　要：研究了以乳化剂ＯＰ／正丁醇／正庚烷／水微乳液为介质，雷氏盐浊度法测定汞。微乳液的引入，使沉淀颗 粒分散均匀，体系稳定性显著提高，分析条件得到改善，体系可稳定１１ｈ。以４００ｕｍ为测定波长，汞量在０．０４～２．４ ｍｇ／Ｌ范围内线性关系良好。对痕量汞的测定可采用巯基葡聚糖凝胶（ＳＤＧ）进行分离富集，提高了测定的选择性和 灵敏度，用于实际样品测定，结果令人满意。Nephelometric determination of mercury as its Reinecke salt in a microemulsion medium is described. A nonionic microemulsion consisting of emulsifier OP, n-butanol, n-heptane and water was employed to improve the dispersion of the suspended matter and the stability of the system.The emulsion is stable over a period of 11 hours.The linear range of mercury mass concentrations is 0.04 - 2.4g. L^-1 at 400 nm.Mercury can be enriched on sulfhydryl dextran gel (SDG) .The relative deviation is less than 4.0%, while the recovery is 95% - 105%. The method is satisfactory for water and sediment analyses. It is simple, rapid and accurate.

关 键 词：汞 微乳液 雷氏盐 浊度法 

分 类 号：X132[环境科学与工程—环境科学] O614.243[理学—无机化学]