米氏酮分光光度法测定微量金的研究

研究了岩矿石中微量金的测定方法。经王水溶样后,在pH为7的介质中,用重金属离子捕集剂除去绝大部分金属离子,过滤,在pH为3~3.5的介质中,采用甲基异丁基甲酮(MIBK)萃取分离金于有机相,用阳离子表面活性剂十六烷基三甲基溴化铵(CTMAB)为增溶剂,氯金酸根离子(AuCl-)与十六烷基三甲基溴化铵(CTMAB)反应形成黄色的CTMAB-AuC1缔合物,经硫代米氏酮(TMK)-正丁醇显色,用GBC-916型紫外-可见分光光度计于545 nm处测定。在选定条件下测定微量金的含量,其吸光度符合朗伯-比尔定律。该方法灵敏、方便、准确,结果令人满意。

Michler’s Ketone Spectrophotometer Method of Study to Determine the Trace Quantities of Gold

The thesis researches on the method of determining the trace quantities of gold in the ore.After nitrohydrochloric acid put samples dissolved and pH was7,and stuffs in the medium with a metal trap set of ion remove most of the ions and metal filter,and stuffs in pH of 3-3.5 the medium from the use of the tryplan MIBK lizzy take the gold in organic and With surface-active agent of the cationic bromine 16 alkyl the three of the reveal（CTMAB） for a solvent with gold,of bitter root,and ion（AuC1-）surface-active agent of the cationic bromine sixteen alkyl the three of the reveal（CTMAB） response to form a yellow CTMAB-AuC1 complex.The Michler＇s ketone is to be rich,determining in the GBC-916 ultraviolet and visible spectrophotometer in 545 nm.In the conditions for trace quantities of gold,the essential content follows Lambert-Beer law.This method is quick,easy,and accurate,the result is satisfactory.This experiment with a sulfur generation Michler＇s ketone TMK to test of gold with fixative,16 alkyl surface-active agent of the cationic bromine and reveal the base three（CTMAB） for being very good solvent and refined and degrees are finding a satisfactory result.