【摘要】 对GB 11892 - 1989《水质　高锰酸盐指数的测定》中酸性高锰酸钾氧化法测定水中高锰酸盐指数的测量不确定度进行了评定。通过对测量重复性、滴定管、移液管、标准溶液浓度等影响测量结果的不确定度分量的分析和量化 ,求得水中高锰酸盐指数测定结果的相对合成标准不确定度为 1.10× 10 -2 。更多还原

【Abstract】 The uncertainty of measurement was evaluated for the determination of permanganate index of water by the method of GB 11892-1989, the acidic potassium permanganate method. By analyzing and quantifying the uncertainty components of the measurement results, including repeatability of measurement results, burette, suction pipe, the concentration of standard solution, etc., the related combined standard uncertainty is 1.10×10 -2 .更多还原