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.
出处
《有色矿冶》
2009年第3期54-55,43,共3页
Non-Ferrous Mining and Metallurgy
关键词
分光光度法
固相萃取
金
富集
spectrophotometric method
gold
solid phase extraction
enrichment
