溴代十六烷吡啶从碱性氰化液中固相萃取金的研究  

Study on solid phase extraction of gold from alkaline cyanide solution with cetyl pyridine bromide

作　　者：解润芳[1,2] 杨项军[2] 李慧方洁 韩云山[3] 李玉雯 

机构地区：[1]昆明医科大学法医学院,昆明650500 [2]云南大学化学科学与工程学院,昆明650091 [3]云南铜业股份有限公司检验分析中心,昆明6501023 [4]云南省第三人民医院内分泌科,昆明650011

出　　处：《分析试验室》2014年第1期25-29,共5页Chinese Journal of Analysis Laboratory

基　　金：国家自然科学基金项目(20471051)资助

摘　　要：基于溴代十六烷吡啶(CPB)与Au(CN)2-络阴离子生成的离子缔合物可被反相键合硅胶固相萃取柱萃取、富集,建立了一种从碱性氰化液中高富集倍数固相萃取金的方法。在碱性介质中,溴代十六烷吡啶(CPB)与Au(CN)2-络阴离子生成离子缔合物,该离子缔合物可被反相键合硅胶固相萃取柱萃取、富集,富集的离子缔合物可用乙醇洗脱,洗脱液经处理后用分光光度法测定,反相键合硅胶固相萃取柱不被破坏而且可重复使用。方法用于从碱性氰化液中固相萃取痕量金,萃取回收率可超过98%,研究了反向固相萃取金的机理,同时提出了一种从碱性氰化液中提取金的新工艺。Cetyl pyridine bromide （CPB） can react with Au（CN） 2- to form an ionic complex, and the com- pound can be extracted quantitatively. At the same time, it can be enriched highly by a solid phase extraction column of reversed phase bonded silica gel. Therefore, a new method of extracting gold with high enrichment multiple was proposed. In alkaline solution, the surfactant （CPB） could react with Au （CN）2- to from the ionic complex, which could be extracted and enriched by the solid phase extraction column. What enriched by the sol- id phase extraction column could be eluted by ethanol and the gold in the trophotometry. The solid phase extraction column was not easily damaged eluent could be determined with spec- and it could be repeatedly used. The method was used to extract trace amounts of gold from alkaline cyanide solution, and the recoveries of gold were higher than 98% under the optimal experimental conditions. The mechanism of reverse phase solid extraction of gold was studied and a new process of extracting gold from alkaline cyanide solution was also developed.

关 键 词：固相萃取 表面活性剂(CPB) 碱性氰化液 金 分离 富集 机理 新工艺 

分 类 号：O652.6[理学—分析化学]