摘要
通过对实验过程的研究,确定了重铬酸盐法测定地表水中化学需氧量的不确定度来源,分别进行了量化分析定值。实验过程中,不确定度主要来源于样品的重复性检测、滴定样品和标准溶液的标定,在实验中应予以注意和重视。
Analysis of the chemical oxygen demand in surface water by dichromate method was finished, And the source of uncertainty in the experimental process was confirmed. Meanwhile the uncertainty was quantified and assessed. During the experiment, the uncertainty mainly comes from sample detection repeatability, titrating of the sample and calibration of standard solution, So corresponding attention should be paid to the experiment.
引文
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