原子吸收法测定矿石中微量金,一般都要经过富集分离,长期以来活性炭吸附是应用较多的方法,但该法手续较繁,费时太长.目前多采用甲基异丁酮或醋酸丁酯萃取,有机相喷雾,手续简便、灵敏度高.近年来报导了使用泡沫塑料吸附富集,水相喷雾,效果和选择性都较理想,但回收率略低,标准必须同时以泡沫塑料吸附处理,方可抵消其误差. Atomic absorption method for the determination of trace gold ore, generally have to go through the enrichment separation, activated carbon adsorption has long been applied more methods, but the method of more complicated, time-consuming. At present more use of methyl isobutyl ketone or butyl acetate Ester extraction, organic phase spray, simple procedures, high sensitivity.In recent years reported the use of foam plastic adsorption enrichment, water spray, the effect and selectivity are more ideal, but the recovery rate is slightly lower, the standard must be both foam adsorption treatment , To offset its error.