Uncertainty Evaluation of Swelling Degree of Descurainiae Semen
Objective To establish an uncertainty evaluation method for the swelling degree of Descurainiae Semen.Methods The swelling degree was determined based on the general rule 2101(swelling degree determination)of the Chinese Pharmacopoeia(2020 Edition,Volume Ⅳ),the uncertainty sources during the determination process were analyzed,and the uncertainty components were quantified.Results The uncertainty in the determination process were from the relative uncertainty of the volume swelling of the medicinal materials,the weighing and the measurement of moisture,as well as the standard uncertainty of the repeatability of the swelling degree measurement.The determined expanded uncertainty was 0.3 mL/g,and the swelling degree of Descurainiae Semen was(5.5±0.3)mL/g.Conclusion Based on the current swelling degree measurement method,it is suggested that we should revise the scale division of the swelling degree measurement tube(such as changing from 0.2 mL to 0.1 mL),improve the accuracy of the ″mass measurement ″ from 0.01 g to 0.001 g to increase the reliability of the swelling degree measurement of Descurainiae Semen.
万方数据
维普
