ICP-发射光谱法测定地质样品中金

ICP-AES Determination of Gold in Geological Samples

试样经王水分解,在5%～15%的王水介质中,用聚醚型泡沫塑料对金进行分离富集.用硫脲溶液(20g/L)解脱被吸附在泡沫塑料上的金,解脱液在ICP-发射光谱上测定金.方法的检出限为0.020×10^(-6),回收率为97.60%～100.20%,本法具有干扰小,准确度高,快速简便等优点.

After dissoluting the samples by agua regia, the Trace silver is separated and concentrated in the medium of 5-15% agua regia with foam plastics. The silver adsorbed on the plastics is desorb ed by 2%thiourea solution, then the silver desorbed is determined by ICP-AES.The recovery is 97.60-100.20%. the detection limit of proposed method is 0.020lX10-8.The advantages of this method are less interferences, better accuracy, and more rapid and simple to operate.