固相萃取-硫代米蚩酮光度法测定金  

Study on Solid Phase Extraction and Spectrophotometric Determination of Gold with Thio-Michler's Ketone

作　　者：王士贺[1] 白茹[1] 

机构地区：[1]辽宁地质工程职业学院化工系,辽宁丹东118008

出　　处：《有色矿冶》2009年第3期54-55,43,共3页Non-Ferrous Mining and Metallurgy

摘　　要：研究了用多孔石墨化碳黑作反向色谱柱填料,用合成的5-(2-羟基-5-硝基苯偶氮)-硫代若丹宁(HNATR)附着在多孔石墨化碳黑上作吸附剂,制成固相萃取柱来分离和富集金。含金样品以1.0 mol/L的磷酸介质过柱,金定量吸附在小柱上,用0.1 mol/L的硫代硫酸钠洗脱小柱上富集的金,可实现样品中低浓度金的高倍数富集和与大部分干扰离子的分离。在一定条件下用硫代米蚩酮(TMK)显色,用分光光度法在545 nm波长处进行测定,取得满意结果。The porous graphitization carbon black loaded with 5--（2--hydroxy--5--nitrophenylazo） --thio- rho--danine （HNATR） was prepare, and used as a filler of solid phase extraction cartridge for separation of Au. Gold could be adsorbed quantitatively when gold--bearing samples flowed through the cartridge in 1.0 mol/L of phosphoric acid medium . The enriched gold in cartridge was eluted with 0.1 mol/L of sodium thiosulfate, realizing the high multiples enrichment of low concentration gold and the separation from most interfering ions.

关 键 词：分光光度法 固相萃取 金 富集 

分 类 号：O657.2[理学—分析化学]