Evaluation of Uncertainty in the Measurement of Total Acid and Ester in Baijiu by Automatic Potentiometric Titration
According to JJF 10591.1-2012 and GB/T 10345-2022,the total amount of acid and ester in Baijiu was determined by automatic potentiometric titration,and the uncertainty introduced in the determination of Baijiu was analyzed and evaluated by establishing a mathematical model.The results showed that the total amount of acid and ester in Baijiu was(55.7±0.6)mmol·L-1(k=2).The uncertainty component of total acid and total ester consumed by the volume of standard titration solution contributed the most.The uncertainty components introduced by the repeatability measurement of Baijiu samples and the concentration of standard titration solutions were secondary.The smallest contribution of introducing uncertainty components was the removal volume of Baijiu sample.
automatic potentiometric titrationBaijiutotal amount of acid and esteruncertainty
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