工业废水中苯胺类化合物不确定度的评定

Assessment on Uncertainy for Anline Compounds in Industrial Sewage

在水质监测市场化模式下,第三方检测机构在接受监管部门委托对排水户进行水质监测时,有必要对检测结果的不确定度进行说明,以提供更为充分的监测依据。苯胺是工业废水中常含的污染物之一,通过对N-(1-萘基)乙二胺偶氮分光光度法测定工业废水中苯胺的实验过程进行分析。建立数学模型,对造成检测结果不确定度的要素进行评定,从而得出标准溶液浓度、标准曲线,实验仪器,回收率等因素对测定结果造成的影响。

Under the marketization of water quality monitoring, when inspection agencies accept the commission of regulators to monitor drainage water, it＇s necessary for the uncertainty of test results, to provide more adequate monitoring basis. Aniline is one of common pollutants in industrial wastewater. The determination of aniline by spectrophotometric method using N-（ 1 -naphthyl） ethylenediamine was analyzed to find out the cause of uncertainty of measurement results in the process of experiment. Establishing mathematical model and calculating elements caused the uncertainty of test results, to get the impact of standard curve, capacity of the vessel, spectrophotometer, recovery rate and other factors on the determination results.