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在冶金部标准(YB602-78)钨精矿化学分析法中,没有铅的测定方法,但近来用户不断对钨精矿含铅量提出要求,所以钨精矿中铅含量也需要测定。一般钨精矿。(尤其是特级钨精矿)中铅含量都比较低,大量钨有干扰,测定比较困难。虽然可用王水分解试样时析出钨酸以分离钨,但当用原子吸收分析时,结果仍然偏低,可能是由于迅速析出的钨酸沉淀包裹部
In the Ministry of Metallurgical Standards (YB602-78) tungsten concentrate chemical analysis, there is no determination of lead, but the recent users of tungsten concentrate requirements of lead, so the concentration of lead in tungsten concentrate also need to be determined. General tungsten concentrate. (Especially super-grade tungsten concentrate) lead content is relatively low, a lot of tungsten interference determination is more difficult. Although tungstic acid can be precipitated to separate tungsten when the sample is decomposed by aqua regia, the result is still low when analyzed by atomic absorption, possibly due to the rapid precipitation of tungstic acid precipitated inclusions