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Simultaneous Determination of Benzoylperoxide and Benzoic Acid Content in Flour by Ultraviolet Spectrophotometry
Author(s): 
Pages: 52-55
Year: Issue:  4
Journal: GUANGDONG TRACE ELEMENTS SCIENCE

Keyword:  紫外分光光度法过氧化苯甲酰苯甲酸;
Abstract: 建立了一种测定面粉中过氧化苯甲酰及其还原产物苯甲酸含量的紫外分光光度法.采用无水乙醇作参比,在同一样品溶液中分别于233nm和226 nm处同时测定过氧化苯甲酰及其还原产物苯甲酸的含量,由于两组分同时测定时相互影响,通过建立线性方程组的方法消除被测组分间的相互干扰,过氧化苯甲酰在8.26×10-6~4.95×10-6 mol/L和苯甲酸在1.64×10-5~9.84×10-5 mol/L范围内服从比耳定律.该法操作简便、快速,不经提取分离同时测定面粉中过氧化苯甲酰及其还原产物苯甲酸含量获得了较满意的结果.
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