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目的:评价水中硫酸盐(冷法)测定的不确定度,找出方法的不确定度来源。方法:分光光度法(冷法)测定硫酸盐标准物质硫酸盐含量。结果:硫酸盐测量结果125.5 mg/L,不确定度7.2 mg/L。
OBJECTIVE: To evaluate the uncertainty of determination of sulfate in cold water and find out the source of uncertainty of the method. Methods: The sulphate content of sulphate reference material was determined by spectrophotometry (cold method). Results: The sulphate measurement was 125.5 mg / L and the uncertainty was 7.2 mg / L.