【摘要】 用甲基异丁基酮(MIBK)负载泡塑从5%～25%的王水介质中吸附富集金,经2%硫脲～1%盐酸解脱,以原子吸收法测定。金的回收率大于99.8%,方法用于含金地质样品的分析时,效果较泡塑吸附好。用火焰原子吸收法测定w(Au)为19.40×10-6的金标样,验证分离富集方法的可靠性。结果其平均值为19.32×10-6,相对标准偏差(RSD)为1.15%(n=11)。更多还原

【Abstract】 Gold is adsorbed by a polyurethane foam loaded with Methy1 isobuty1 ketone from a 5%²5% aqua regia medium, the adsorbed gold is eluted with 2% thiourea 1% hydrochloric solution.The gold recovery ratio is over 99.8%. For samples richer in gold, the method is better than adsorption on a polyurethane foam. For the determination of gold in a standard sample containing 19.40×10^-6 Au, the average of 11 results is 19.32×10^-6 Au with a 1.15%RSD.更多还原