铋磷钼蓝光度法测定磷含量此方法显色体系简单,操作快速,稳定性好,相对偏差较小,精密度和准确度令人满意。但是此方法影响因素较多,在学生实验和比赛过程中,会出现测定结果不准确,甚至偶尔还会出现不显色的现象。本文结合显色条件,就显色温度、时间、酸度的影响和操作要点进行分析。 Determination of phosphorus content by bismuth phosphomolybdate blue photometry The method has the advantages of simple color system, fast operation, good stability, small relative deviation, satisfactory precision and accuracy. However, this method has many influencing factors. In the process of students’ experiment and competition, the result of measurement may be inaccurate, and even occasional non-color phenomenon occurs. In this paper, with the color conditions, the color temperature, time, acidity and the operation of the main points of analysis.