Uncertainty Assessment of Sulfur Dioxide Determination in Dried Tremella fuciformis
Objective:To evaluate the uncertainty of the determination process of sulfur dioxide content in dried Tremella fuciformis.Method:The sulfur dioxide content of dried Tremella fuciformis was determined according to the acid-base titration method of GB 5009.34-2022.According to the requirements of JJF 1059.1-2012,the mathematical model of uncertainty evaluation is established,the uncertainty components of each experimental link are analyzed,and all kinds of uncertainties are evaluated and synthesized according to different classification sources.Result:The sulfur dioxide content in dried Tremella fuciformis was 186 mg·kg-1 and the extended uncertainty was 5 mg·kg-1(k=2).Conclusion:By evaluating the uncertainty of sulfur dioxide in dried Tremella fuciformis,it is found that the uncertainty of sulfur dioxide in Tremella fuciformis mainly comes from the uniformity of the sample and the standard solution,which provides a reference for the subsequent improvement of the accuracy and reliability of sulfur dioxide in Tremella fuciformis by acid-base titration.
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