微量杂质分析用化学方法分析目前还存在一定的困难,它一方面要受设备和仪器的限制,另一方面又需要复杂的操作手续和昂贵的化学药品,并且一般分析周期都较长,采用光谱法分析能克服这些缺点,铸铁中微量铋的分析我们采用了化学光谱分析方法。 Trace impurity analysis Chemical method analysis is still some difficulties, it is subject to the restrictions of equipment and equipment, on the other hand requires complex procedures and expensive chemicals, and the general analysis cycle is longer, the use of spectroscopy Analysis of the law to overcome these shortcomings, the analysis of trace amounts of bismuth in cast iron We used a chemical spectroscopy method.