钼酸铵分光光度法测定废水总磷的不确定度评定

Evaluation of the Uncertainty for the Determination of the Total Phosphorus in Wastewater by Ammonium Molybdate Spectrophotometric Method

以山东昌乐县某污水厂出水为样品,分析评定钼酸铵分光光度法测定废水总磷的不确定度。通过建立模型、分析不确定度来源、合成相对标准不确定度等,得出该样品不确定度报告为(0.49±0.014)mg/L(包含因子k=2),并提出降低不确定度的措施。

Taking the effluent of a sewage plant in changle county,SHANDONG province as a sample,the uncer-tainty of ammonium molybdate spectrophotometric determination of the total phosphorus in wastewater was analyzed and evaluated.By establishing the model,analyzing the source of uncertainty and synthesizing the relative standard uncertainty,the uncertainty report of the sample is(0.49±0.014)mg/L(including factor k=2),and the meas-ures to reduce the uncertainty are put forward.