纳氏试剂光度法测定废水中氨氮不确定度的评定

Nessler's Reagent Spectrophotometry Determination of Ammonia Nitrogen in Wastewater Evaluation of Uncertainty

根据JJF 1135-2005[1]要求,对废水中氨氮的纳氏试剂光度法测定结果的不确定度进行评定。通过对该方法不确定度分量的分析和计算按氨氮标准贮备溶液的配制、贮备溶液的稀释和取样、校准曲线的绘制及样品的测定等操作步骤的先后顺序进行逐个合成比较,找出影响测定准确度的主要因素。

According to the requirements of JJF 1135-2005 Ammonia nitrogen in waste water of nessler＇s reagent spectrophotometry determination of the uncertainty of evaluation results. Method based on the analysis and calculation of the uncertainty components, According to the ammonia standard stock solution, Dilute the stock solution, sampling, Calibration curve drawing and the determination of samples, Sequence of steps such as synthetic compare them one by one. Find out the main factors influencing the accuracy of measurement.