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钢中存在某些微量或痕量的元素对钢的性能是有影响的,砷、铋存在量为0.0002％就能影响钢的质量。随着进出口钢材量的增加,对痕量元素的检验均有要求,常规的费时湿法分析已不能胜任,采用增量加入法也因难保准确性及手续繁琐而不适用,所以相应地制定出灵敏、准确、快速的痕量元素(0.000x～0.00x％)的分析方法是极其迫切需要的。 氢化物原子吸收法测定砷、铋等元素具有较好的相对灵敏度及满意的测定精度,本文介绍并利用酸性介质中以硼氢化钾为还原剂,生成不太稳定的共价氢化物(铋化氢、砷化氢),以氩气载流进入加热石英管中瞬间进行原子化测定。使用MHS—20氢
The presence of some trace or trace elements of steel has an impact on the performance of steel, arsenic, bismuth present in an amount of 0.0002% can affect the quality of steel. With the increase of the amount of imported and exported steel, the inspection of trace elements are required, the conventional time-consuming wet analysis has been unable to use incremental addition method is also difficult to ensure the accuracy and procedures cumbersome and not applicable, so the corresponding formulation Analytical methods that produce sensitive, accurate, and rapid trace elements (0.000x to 0.00x%) are extremely desperately needed. Hydride atomic absorption method for the determination of arsenic, bismuth and other elements have good relative sensitivity and satisfactory measurement accuracy, this paper describes and the use of potassium borohydride in acidic media as a reducing agent to generate less stable covalent hydride (bismuth Hydrogen, arsine), carrying the argon flow into the heated quartz tube for instantaneous atomic determination. Use MHS-20 hydrogen