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GB及ISO中酸碱指示剂法测定食品中总酸的指示剂研究
Authors
王丽蓉(厦门口岸药品检验所)
黄秀菁
Publication date
1 December 2002
Publisher
《分析科学学报》编辑部
Abstract
在实际分析检测工作中 ,发现 GB或 ISO的酸碱滴定指示剂法 ,以酚酞为指示剂无法克服样品底液颜色深或浊度大而干扰终点观察 ,尤其是果汁饮料系列产品色彩缤纷 ,终点观测不方便 ,甚至无法观测 ,实验重现性差 ,严重影响测定结果的准确度与精密度。本文选择百里酚蓝为酸碱滴定指示剂 ,可克服原法缺点与局限。应用于果汁饮料系列产品柠檬酸含量测定 ,结果满意
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Last time updated on 16/06/2016