氯化氰浸渍炭防护时间标准物质定值的不确定度评定

Uncertainty Evaluation for the Determination of Cyanogen Chloride Protective Time Impregnated Carbon Certified Reference Material

本文通过化学指示液确定氯化氰透过终点、自动电位滴定法测定氯化氰原始浓度的方法 ,对氯化氰浸渍炭防护时间标准物质进行定值,详细分析了定值试验中可能引入不确定度的测量过程,最终合成确定本标准物质的定值结果。氯化氰防护时间浸渍炭标准物质定值结果为46.12 min,扩展不确定度为6.3%(k=2)。

Based on the method of determination tile cyanogen chloride test concentration by automatic potentiometric titratiCm and the breakthrough time by chemical indicating solution, the standard value of cyanogen thloride protective time impregnated carbon certified reference material was determined. The uncertainty components which were introduced from the determination experimental process were analyzed in details. The slandard value of cyanogen chloride protective time impregnated carbon certified reference material is 46.12 rain, and extended uncertainty is 6.3% （k=2）