《水质 化学需氧量的测定 重铬酸盐法》新旧标准比较

Comparison of the New and Old Version Standard of Water Quality-Determination of the Chemical Oxygen Demand-Dichromate Method

比较了《水质化学需氧量的测定重铬酸钾法》新标准《HJ 828—2017》与旧标准《GB/T 11914—1988》的区别。相较旧标准,新标准主要对取样体积、硫酸汞加入方法和加入量、氯离子浓度粗判、方法检出限和检出下限、质量保证与质量控制等内容进行了修订。针对新标准中校核要求、方法检出限计算及平行双样质量控制方面存在的问题进行探讨。

The new （ HJ 828 -2017） and old % GB/T 11914-1988 ） version standard of Water Quality-Determination of tlie Chemi-cal Oxygen Demand-Dichromate Metliod were compared and discussed. As compared with the old version,the sample volume,theaddition amount of mercury sulfate,the method of chloride ion determination,the method determination l im it,quality assurance andquality control were revised. The checkout test, the calculation of methiod determination limit and the trol of parallel sample in new vrsion standard were discussd.