氯气校正法测定化学需氧量的不确定度评定

摘要

对氯气校正法测定高氯水中化学需氧量含量的不确定度进行评定，通过不确定度的理论，对样品分析测量过程中的不确定度的各种影响因素：标准溶液配置、玻璃器皿、检测的重复性结果等，分别进行分析，最终给出扩展不确定度，为高氯水样化学需氧量的测定的实验室质量控制提供参考依据，提高水样分析的准确度。%The method to evaluate the uncertainty of measurement for determining the chemical oxygen demand with high salinity in water was described, and factors on uncertainty were analyzed based on the theory of uncertainty determination from the angle of testing process and calculation method. Uncertainty components, such as the glassware, preparation of standard solutions, measurement repeatability, were analyzed and the final expanded uncertainty was given, providing reference to the laboratory quality controlling for measurement of chemical oxygen demand with high salinity in water.