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采用二苯硫脲(DPTU)—三正辛胺(TNOA)棉富集分离金、银已有报道。本文采用该吸附剂制备了DPTU—TNOA棉吸附柱,并研究了动态法富集分离金、银的条件。研究表明.吸附柱富集金、银的最佳酸度(体积分数)为5％～20％王水。当含金溶液以1～6ml·min~(-1)流速通过0.1g吸附剂制备的吸附柱时,金、银的吸附率均在98％以上。采用硫代米蚩酮(TMK)液珠萃取比色法连续测定了地质样品中的金、银。方法的检出限为0.5×10~(-9),银为5×10~(-9)。经样品验证,其分析结果满足化探找金工作的需要。
Enrichment and separation of gold and silver with diphenylthiourea (DPTU) -tri-n-octylamine (TNOA) cotton have been reported. In this paper, DPTU-TNOA cotton adsorption column was prepared by this adsorbent, and the conditions of gold and silver enrichment by dynamic method were studied. Studies have shown that adsorption column enrichment of gold, silver the best acidity (volume fraction) of 5% to 20% aqua regia. When the gold solution passes through the adsorption column prepared by 0.1g adsorbent at the flow rate of 1 ~ 6ml · min ~ (-1), the adsorption rates of gold and silver are above 98%. The gold and silver in geological samples were continuously measured by thiomolymph ketone (TMK) liquid - bead extraction colorimetry. The detection limit of the method was 0.5 × 10 ~ (-9) and the silver was 5 × 10 ~ (-9). After the sample verification, the results of the analysis to meet the needs of the work of gold exploration.