共沉淀-泡塑吸附-电感耦合等离子体质谱法测定察尔汗盐湖卤水中的痕量金

Determination of trace gold in brine samples by ferric hydroxide coprecipitation-blister adsorption-inductively coupled plasma mass spectrometry

通过向卤水样品中加入NaOH产生Mg(OH)_2,共沉淀使金与大量盐类分离,HCl溶解沉淀,泡塑吸附,解脱,以电感耦合等离子体质谱法测定卤水样品中的痕量金,确定了NaOH最佳加入量和pH值,优化了吸附解脱条件,方法回收率为96%~104%,方法检出限可达到0.013μm·L^(-1),此方法简便、快速、灵敏度高,是测定卤水中痕量金的可行性方法。

Adding sodium hydroxide to the brine sample to produce magnesium hydroxide,coprecipitation to separate the gold from a large number of salts, hydrochloric acid dissolving precipitation, Using blister adsorption, and then release, the determination of trace gold in brine samples by inductively coupled plasma mass spectrome- try, determines the optimum addition amount and sodium hydroxide and pH,adsorption free condition was opti- mized,the method of recovery is 96%-96%, the method detection limit can be reached 0.013g· L-1.This method was simple, quick and sensitive and it was the feasible method for determination of trace gold in brine