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矿石中铜的示波极谱法测定,大多数采用氯化铵-氢氧化铵为底液。在该底液条件下,铜产生两个还原波。在多金属矿中,由于干扰因素多,往往使铜的波形出现多个拐点,而且基点的确定也比较困难,容易引起误差。本文以乙二胺-硫酸钾为底液对多金属矿石中铜的测定进行试验。Cu~(2+)与乙二胺的络合物[CuEn]~(2+)专在滴汞电极上能直接还原成金属铜。经试验确定,以在2500毫升底液中含有300毫升乙二胺(C_2H_8N_2)、97克硫酸钾、100克无水亚硫酸钠、100毫升0.25%动物胶作为底液条件。在此条件下铜只有一个波,其峰电位在-0.5伏(对饱和
Oscillopolarographic determination of copper in the ore, most of the ammonium chloride - ammonium hydroxide as the bottom liquid. Under this bottom liquid condition, copper produces two reduction waves. In polymetallic ore, because of many interference factors, it often causes multiple inflection points of the copper waveform, and the determination of the base point is also more difficult and easy to cause errors. In this paper, ethylenediamine - potassium sulfate as the base of the determination of copper in polymetallic ore test. Cu ~ (2+) and ethylenediamine complexes [CuEn] ~ (2+) specifically on the drop mercury electrode can be directly reduced to metallic copper. It has been determined to contain 300 ml of ethylenediamine (C 2 H 8 N 2), 97 g of potassium sulfate, 100 g of anhydrous sodium sulfite, and 100 ml of 0.25% animal glue as base solution in 2500 ml of base solution. In this condition there is only one wave of copper with a peak potential of -0.5 volts (for saturation