摘要
应用分光光度法测定面粉中增白剂过氧化苯甲酰的含量,过氧化苯甲酰把Fe2+氧化为Fe3+,Fe3+与邻菲罗啉发生褪色反应,结果表明,褪色反应与过氧化苯甲酰含量在0.1-0.5 mg/mL呈线性关系,线性回归方程为△A=0.444 C+0.0057,r=0.9946。
The content of bleaching agent of benzoyl peroxide （BPO） in flour is studied by spectrophotometer basing on the theory that Fe element would be oxidized by BPO from Fe^2＋ to Fe^3＋ , which would be discolored by 1.10 - Phenanthroline. It is proved that the relationship between the discoloring reaction and BPO content in 0.1 - 0.5 mg/mL is the linear regression of △A = 0.444C ＋ 0.0057 in 0.1 - 0.5 mg/mL （r=0.9946）.
出处
《粮食与食品工业》
2006年第3期47-49,共3页
Cereal & Food Industry
关键词
过氧化苯甲酰
漂白剂
测定
benzoyl peroxide
bleaching agent
determination
