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

摘要

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,HC1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 spectrometry,determines the optimum addition amount and sodium hydroxide and pH,adsorption free condition was optimized,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