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特级品白钨精矿中铜、锌的允许量甚低(铜0.01%,锌0.02%),采用国产JP—1A型示波极谱仪进行测定试验,结果表明,在含有乙醇的稀硫酸溶液中能同时分离干扰测定的大量钨、钙,从而富集了铜、锌,提高了测定灵敏度和准确度,在氢氧化铵—氯化铵溶液中进行连续测定,铜、锌含量分别为0.01%和0.02%时,相对标准偏差为3%,测定范围为0.005～0.3%.一、仪器与试剂JP—lA型示波极谱仪,滴汞电极作指示电极,甘汞电极作参比电极,自制面积为
The content of copper and zinc in special grade scheelite concentrate is very low (0.01% for copper and 0.02% for zinc), and the determination test is made by using Chinese-made JP-1A oscilloscope. The results show that in the dilute sulfuric acid solution containing ethanol In the same time can separate a large number of interference determination of tungsten, calcium, thereby enriching the copper and zinc, to improve the determination of sensitivity and accuracy in ammonium hydroxide - ammonium chloride solution for continuous determination of copper and zinc were 0.01% And 0.02%, the relative standard deviation of 3%, the determination of the range of 0.005 ~ 0.3%. First, instruments and reagents JP-lA-type oscilloscope polarographic instrument, mercury drop electrode as a indicator electrode, calomel electrode as a reference electrode, Self-made area is