Evaluation of Uncertainty of Test Results of Quality Control Samples for Mold and Yeast Enumeration
Objective:Evaluate the uncertainty of mold and yeast count test results of quality control samples.Method:According to the first method of GB 4789.15-2016 and RB/T 151-2016,plate counting was used methods are used to conduct inspections,the sources of uncertainty components are analyzed and evaluated,and then the uncertainty of the inspection results is synthesized.Result:When the confidence probability is 95%,the expanded uncertainty of the sample test results is 0.040 9,and the test result interval ranges from 3 700 to 4 500 CFU·mL-1.Conclusion:The main factors that affect the uncertainty of test results are the preparation of 1∶10 sample homogeneous solution and repeated testing of samples.Therefore,laboratory operators should strengthen the control of relevant factors to improve the accuracy of test results.
NETL
NSTL
万方数据
