自动电位滴定法测定无糖饮料中的总酸含量
Determination of Total Acid Content in Sugar Free Beverages by Fully Automatic Potentiometric Titration
郭玉楼 1柳樱华 1吴继强 1于娇娇 1苏兴武 1杜莹莹 1王小龙1
作者信息
- 1. 兰州石化职业技术大学,甘肃兰州 730060
- 折叠
摘要
基于自动电位滴定法分析测定了无糖饮料中的总酸含量,实验结果显示,当称取无糖气泡水 50.005 1 g、无糖茶饮品 50.022 7 g、无糖果汁 50.052 2 g时,其总酸含量分别为 3.89,3.58,4.12 g/kg.该方法的加标回收率在 94.0%～106.0%,RSD均小于 2%,表明该方法准确度高、精密度好、可行性高.本文也简单探讨了测定过程中误差的来源及减免方法,其中误差主要来源于NaOH标准溶液的配制、无糖饮料待测试液的滴定分析及分析测试人员的操作.
Abstract
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.
关键词
无糖饮料/总酸/自动电位滴定法/误差Key words
sugar free beverages/total acid/automatic potentiometric titration/error引用本文复制引用
基金项目
国家级大学生创新创业训练计划(202216209002)
出版年
2024
NETL
NSTL
万方数据