摘要
以喹钼柠酮作为沉淀剂,在酸性介质中,与样品中的正磷酸根反应生成黄色磷钼酸喹啉沉淀,对该沉淀分别用容量法和重量法进行测定,测得样品中w(磷)为40%～48%。对照实验表明,重量法测定结果准确度和精密度均较高,而容量法测定结果误差较大,分析发现容量法测定过程中存在6项不确定因素。
C_9H_7N and Na_2MoO_4 as the precipitate conduct, react with the positive phosphoric root of the sample in the acidic surrounding,thus getting a yellow precipitate. We test the precipitate in capacity method and weight method respectively,using (NH_4)_2HPO_4 as the standard sample. We get the phosphorus content. There are very much differences in the two results. We discuss some affecting factors in capacity method.
出处
《河北科技大学学报》
CAS
2003年第4期57-60,共4页
Journal of Hebei University of Science and Technology
基金
河北省科技厅重点课题(0213002D)
