我们试验了Cu(DDTC)_2-CCl_4萃取减色光度法,测定氰化浸金过程金矿石、浸渣、浸液中的银。1.主要试剂和仪器(1)银标准溶液称取在110℃干燥后的AgNO_3(优级纯)1.5747g溶于水中,加入5ml硝酸,移入1L容量瓶中,用水稀释至刻度。该溶液含银1.0mg/ml。用上述储备液稀释配制银含量为10μg/ml的工作溶液。 We tested Cu (DDTC) _2-CCl_4 extraction subtractive spectrophotometry, determination of gold cyanide leaching gold, leaching, silver immersion solution. 1. Main Reagents and Instruments (1) Silver standard solution Weigh 1.5747g of AgNO_3 (excellent pure) dissolved in water after drying at 110 ℃, add 5ml of nitric acid, transfer to 1L volumetric flask and dilute to the mark with water. The solution contained silver 1.0 mg / ml. A working solution of a silver content of 10 μg / ml was diluted with the above stock solution.