对钼酸铵分光光度法测定总磷的测定上限的讨论

Discussion on the Upper Limit of Total Phosphorus Determination by Ammonium Molybdate Spectrophotometry Method

总磷是环境监测中的重要监测指标之一,实际样品中总磷浓度波动较大,现行方法(《水质总磷的测定钼酸铵分光光度法》(GB/T11893-1989))规定的测定上限较低,不利于提高实验室工作效率。结合实验分析及实际工作经验,我们认为把方法中总磷的测定上限从0.60 mg/L提高到1.20 mg/L是合适且合理的。

Total phosphorus is one of the important indicators in environmental monitoring.The concentration of total phosphorus in actual samples fluctuates greatly,and the upper limit of the current method(《Water quality-Determination of total phosphorus-Ammonium molybdate spectrophotometry method》(GB/T 11893-1989))is low,which is not conducive to improving the efficiency of the laboratory.Combined with experimental analysis and practi cal work experience,we think that it is appropriate and reasonable to increase the upper limit of total phosphorus determination from 0.60 mg/L to 1.20 mg/L.