The uncertainty assessment and the application in the ability comparison of the result for Codonopsis Radix measured by lose on drying method
Objective To explore the uncertainty between the moisture data of the measured slice and the real data,and perform the ability comparison.Methods Based on the 2nd drying method of the Water Determination Method in Section 0832 of General Article in the 2020 Chinese Pharmacopoeia General Provisions,measured the moisture of Codonopsis Radix,evaluated the source of uncertainty and calculated the measurement expansion uncertainty of the lose on drying method.Referenced CNAS-GL02:2014 Guidance in Statistical Processing and Evaluation of Competence results to measure the uncertainty for in-house capability comparison.Results In the process in assessing the water content of Codonopsis Radix by the lose on drying method,when the supply water was 12.13%,the spread uncertainty was 0.34%(k = 2),and the result was(12.13±0.34)%(k =2),and the En was 0.305(En≤1),which was satisfactory.Conclusion In the research of the uncertainty measured by lose on drying method,the repeatability factor of this method contributes the most to the uncertainty and the second is the constant weight factor,but the weighing factor of the balance has the least influence on the uncertainty.The uncertainty assessed by different researchers can be used in the calculation of competency comparisons.The uncertainty of the experiment can be reduced by certain quality control measures.
Codonopsis RadixUncertaintyAbility comparisonEn value
NETL
NSTL
万方数据
维普
