Evaluation of the Uncertainty during the Measurement of Total Acids Content in Liquor

The uncertainty during the measurement of total acids content in liquor was investigated including the evaluation of each uncertainty variable component and the study of synthetic uncertainty and expanding uncertainty. The results indicted that the main uncertainty source covered the uncertainty induced by consumed NaOH standardized solution volume V1 in calibration, the uncertainty induced by consumed NaOH standardized solution volume V2 in liquor sample titration, the uncertainty induced by liquor sample volume V0, the uncertainty induced by mKHP, the uncertainty induced by PKHP, and the uncertainty induced by measuring repeatability. Among all the factors, the influence of MKHP, MHAC, mKHP and PKHP on the uncertainty was less important.