Determination of Total Acid Content in Sugar Free Beverages by Fully Automatic Potentiometric Titration
This experiment was based on the automatic potentiometric titration method to analyze and determine the total acid content in sugar free beverages.The experimental results displayed When 50.005 1 g of sugar free bubble water,50.022 7 g of sugar free tea beverage,and 50.052 2 g of sugar free juice were weighed,the total acid content was 3.89,3.58 and 4.12 g/kg,respectively.The spiked recovery rate of this method ranged from 94.0%to 106.0%,with RSD%less than 2%,which indicated the automatic potentiometric titration method had high accuracy,good precision,and high feasibility.The sources and reduction methods of errors in the measurement process was also briefly discussed in this article.The error mainly comes from the preparation of NaOH standard solution,the titration analysis of the sugar free beverage test solution,and the operation of the analysis and testing personnel.
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