测定钢中砷,过去有很多方法报导,如钼蓝比色法、碘滴定法、光电比浊法和极谱法等等。但这些方法均较繁琐,如需要蒸馏,将单体砷分离、富集以及用一些对人体有害的有机溶剂进行多次萃取和水银等,且这些方法灵敏度也较低,不能满足钢中百万分之几的砷的测定。为提高测定钢中低于0.01％砷的灵敏度, Determination of arsenic in steel, there are many methods reported in the past, such as molybdenum blue colorimetric method, iodometric titration, photoelectric turbidimetry and polarography and so on. However, these methods are more cumbersome, such as the need for distillation, the separation of monomer arsenic, enrichment and the use of some harmful organic solvents for multiple extraction and mercury, etc., and these methods are also less sensitive, can not meet the millions of steel A few of the determination of arsenic. To improve the sensitivity of less than 0.01% arsenic in steel,