系列液体和固体水分标准物质的研制

Progress of the Research of Certified Reference Materials for Water Content of Liquid and Solid

针对水分检测领域对标准物质的需要,研制了系列水分标准物质,包括4种液体水分标准物质,量值覆盖范围为0.139~47.6 mg/g,不确定度范围为0.012~1.1 mg/g;还包括3种含结晶水化合物水分标准物质,量值覆盖范围为50.7~156.3 mg/g,不确定度范围为0.6~1.3 mg/g,以及3种混合物水分标准物质,量值覆盖范围为0.142~9.90 mg/g,不确定度范围为0.013~0.20 mg/g。该系列液体和固体水分标准物质,适用于卡尔·费休库仑法和容量法水分仪的校准和检定,以及水分测量方法的验证,能够保障我国水分检测的量值准确和等效一致。

In order to satisfy the needs of reference materials for water content of analytical lab,a series of certified reference materials（CRMs） have been developed,including 4 CRMs of liquid with a water content ranging from 0. 139mg/g to 47. 6mg/g and an expanded uncertainty ranging from 0. 012 mg/g to 1. 1mg/g,3 CRMs of compounds containing crystal water with a water content ranging from 50. 7mg/g to156. 3mg/g and an expanded uncertainty ranging from 0. 6mg/g to 1. 3mg/g,and 3 CRMs of mixture with a water content ranging from 0. 142 mg/g to 9. 90 mg/g and an expanded uncertainty ranging from 0. 013 mg/g to 0. 20 mg/g. This series of CRMs are suitable for the calibration and verification of Karl Fischer coulometric titrator and volumetric titrator,and the validation of analytical method for water content,which assures the accuracy and consistency of water content results in our country.