钼蓝法是测定磷比较成熟的方法，其特点是准确度高、灵敏度高、选择性好，适用于在大量金属离子存在情况下，对硫酸锌电解液（50~150 g/L）中0.015 mg/L以上的P204进行测定。采用钼蓝法分别测定总磷和原溶液中的有机磷含量，并计算P204含量。测定结果显示，磷的浓度与吸光度呈良好的线性，相关系数r为0.99973，加标回收率为95.45%~107.1%，平均回收率为101.4%。%Molybdate blue method is a well-established method and its features is high accuracy, high sensitivity and excellent selectivity. This method is used to determinate P204 above 0.015 mg/L in zinc sulphate electrolyte (50~150 g/L) with a large number of metalions. Total phosphorus and organic phosphorus content are measured by molybdate blue method, then content of P204 is calculated. The determination results showed that there is a good linear relationship between absorbancy and phosphorus concentration, the correlation coefficient is 0.99 973, adding standard recovery is 95.45~107.1% and average recovery rate is 101.4%.
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