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矿石中微量锡的催化极谱测定和常量锡的极谱测定时,铅和钨有干扰,铅波与锡波重合使结果偏高,钨大于200微克使锡的测定结果偏低。故锡矿石中的沿和钨必须很好考虑分解分离问题。分解锡矿石最有效和最常用的方法有:一、碱熔融法可分解氧化物、硫化物或其他较复杂的矿样,但对含钨、铅矿样需先用酸处理,残渣再经碱熔融,手续麻烦,并易使酸溶锡样结果偏低);二、锌粉还原焙烧法
When the determination of trace tin in ore by catalytic polarography and polar tin polarographic determination, the interference of lead and tungsten, lead and tin wave overlap so that the result is too high, more than 200 micrograms of tungsten tin determination result is low. Therefore, along the tin and tungsten must be well considered decomposition and separation problems. The most effective and most commonly used methods to decompose tin ore are as follows: 1. Alkali melting method can decompose oxides, sulfides or other more complex ore samples. However, for tungsten and lead samples, acid treatment is first required and the residue is treated with alkali Melting, troublesome procedures, and easy to make acid-soluble tin-like results low); Second, reduction roasting zinc