Uncertainty Assessment of Measured Total Number of Aerobic Bacteria in Raw Ginseng Powder
Objective:To analyze the source of uncertainty of the measured total number of aerobic bacteria in raw ginseng powder,evaluate the uncertainty of the measured results,and improve the accuracy of the results.Methods:According to Part 4:General Principles,introducing 1105 microbial limit inspection of non-sterile products in the Pharmacopoeia of the People's Republic of China(2020 Edition),the microbial counting method was used to determine the total number of aerobic bacteria in the sample and judge the results.According to the provisions of the Evaluation and Expression of Uncertainty in Measurement(JJF 1059.1-2012),the uncertainty components introduced in the determination process were evaluated,and the uncertainty of the total number of aerobic bacteria in raw ginseng powder was calculated and evaluated by synthetic method.Results:When the confidence probability was 95%,the extended uncertainty of the measured total number of aerobic bacteria in raw ginseng powder was 0.016 292,and the range of the sample results was 78 289-84 392 CFU·g-1.Conclusion:This method can effectively evaluate the uncertainty of the total number of aerobic bacteria in raw ginseng powder and can provide a reference for the microbial examination of raw powder of medicinal materials in the future.
ginsengtotal number of aerobic bacteriauncertainty assessmentmicrobial examination
万方数据
维普
