硫化钼样品预处理对测定总铁含量的影响研究

Effect on the Determination of Iron Content in Molybdenum Disulfide by Pretreatment

通过优化硫化钼样品预处理的工艺参数，提高铁的浸出率，从而更加准确地测定硫化钼中铁的含量。首先，选择硝酸．氯酸钾．盐酸湿法消解体系，加入过量氨水调节溶液pH。利用紫外分光光度法测定硫化钼中的总铁含量，其中测量结果标准偏差为0．0004062，平均加样回收率为99．89％。该方法测定结果准确度高、易操作，能够满足科研和产品检验的要求，为生产过程控制和质量控制提供了一定的分析依据。

By optimizing the process parameters of the pretreatment of sulfide molybdenum samples,the leaching rate of iron was improved, and the iron content of molybdenum sulfide was determined more accurately. Firstly, the nitrate potassium chlorate-hy- drochloric acid wet digestion system was chosen,and solution pH was adjustment by add the excess ammonia.The total iron con- tent in molybdenum disulfide was determined by ultraviolet （UV） spectrophotometry,and the standard deviation of the measure- ment result is 0. 000 406 2,the average recovery is 99.89%.The method is more accurate, easy to operate and can meet the re- quirements of scientific research and product inspection, and provides an important analysis basis for the production process con- trol and quality control.