氮化钒铁中磷含量的铋磷钼蓝分光光度法测定

Determination of Phosphorous in Ferrovanadium Nitride by the Bismuth Phosphomolybdate Blue Spectrophotometric Method

采用铋磷钼蓝分光光度法测定氮化钒铁中的磷含量。研究了显色体系稳定性、显色体系酸度、显色剂用量等对测定结果的影响。结果表明，显色时间为20min，在4％～7％的硝酸介质中，钼酸铵加入量为4～10mL范围内吸光度值最大且稳定。确立了氮化钒铁中磷含量的检测条件；同时对方法准确性和精密度进行研究。研究与应用实践表明，该方法操作简便、测定结果准确、具有较强的实用性。

The amount of phosphate in iron vanadium nitride was determined by the bismuth phosphomo- lybdate blue spectrophotometric method. The effect of the stability of the coloring system, the acidity and the amount of coloring agent was studied. As a result, the optinum conditions for the test were obtained, and the accuracy and precision of the method were ascertained. The results show that the method is sim- ple, fast, precise and accurate.