N-(1-萘基)乙二胺偶氮分光光度法测定水中苯胺类的测量不确定度评定

Evaluation of Measurement Uncertainty for Determination of Anilines in Water by N-(1-naphthalene) Ethylenediamine Azo Spectrophotometry

测量的目的是确定被测量值或获取测量结果。有测量必然存在测量误差,在误差理论中,由于被测量自身定义和测量手段的不完善,使得真值不可知,造成了严格意义上的测量误差不可求。因此在环境监测时有必要对不确定度进行说明,以提供更加充分的监测依据。苯胺类在3类致癌物清单中,是水中常见的污染物。本文通过对N-(1-萘基)乙二胺偶氮分光光度法测定苯胺类的试验过程进行检测,然后,建立对应的数学模型,对影响结果不确定度的来源进行分析评定,经过合成得到扩展不确定度。

The purpose of measurement is to determine the measured value or to obtain the measured result. There must be measurement errors in measurement. In error theory, because of the imperfect definition of measurement itself and measurement means, the true value is unknown, resulting in measurement errors can’t be obtained in a strict sense. Therefore, it is necessary to explain the uncertainty in environmental monitoring in order to provide a more sufficient monitoring basis. Anilines is a common pollutant in water in the list of category 3 carcinogens. In this paper, the experimental process of determination of aniline by N-(1-naphthyl) ethylenediamine azo spectrophotometry was tested, then, the mathematical model was builted. The sources of uncertainty affecting the results were analyzed and evaluated. The expanded uncertainty was obtained by synthesis.