光度法测定小麦面粉中过氧化苯甲酰
Photometric Determination of Benzoyl Peroxide in Wheat Flour
摘 要
在磷酸介质中,过氧化苯甲酰氧化碘化钾生成的碘与淀粉显色,在585 nm波长处有最大吸收峰,建立了碘化钾碘蓝光度法间接测定微量过氧化苯甲酰的方法.过氧化苯甲酰的质量浓度在0.016 g·L-1以内呈线性.方法应用于新出产的小麦面粉中过氧化苯甲酰的测定,回收率在93.3%以上.
过氧化苯甲酰
淀粉
小麦面粉
Benzoyl peroxide
Photometry
Starch
Wheat flour
Abstract
In a dil.H3PO4 solution,potassium iodide was oxidized by benzoyl peroxide to give iodine quantitatively.A blue colored complex was formed by the reaction of the liberated iodine with starch,and its absorption measured at 585 nm,the absorption maximum of the blue colored complex.Linear relationship was kept within 0.016 g·L-1 of benzoyl peroxide.As an indirect photometric method for the determination of microamounts of benzoyl peroxide,it was applied to the analysis of wheat flour samples,and values of recovery over 93.3% were obtained.
中图分类号 O657.31
所属栏目 工作简报
基金项目
收稿日期 2007/1/11
修改稿日期
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备注张东(1974-),男,吉林伊通人,工程师,主要从事仪器分析和环境监测工作.
引用该论文: ZHANG Dong,YU Ping,GAO Jun-jie. Photometric Determination of Benzoyl Peroxide in Wheat Flour[J]. Physical Testing and Chemical Analysis part B:Chemical Analysis, 2008, 44(5): 436～437
张东,余萍,高俊杰. 光度法测定小麦面粉中过氧化苯甲酰[J]. 理化检验－化学分册, 2008, 44(5): 436～437
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参考文献
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【6】Yukiko Abe-Onishi,Chikako Yomota,Naoki Sugimoto,et al.Determination of benzoyl peroxide and benzoic acid in wheat flour by high-performance liquid chromatography and its identification by high-performance liquid chromatography-mass spectrometry[J].Journal of Chromatography A,2004,1040(2):209-214．
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【9】Yang Weiping,Zhang Zhujun,Hun Xu.A novel capillary microliter droplet sample injection-chemiluminescence detector and its application to the determination of benzoyl peroxide in wheat flour[J].Talanta,2004,62(4):661-666．
【10】胡章记.面粉中增白剂的紫外光度法测定[J].分析科学学报,2004,20(1):107-108．
【2】郭光美,王未肖,高磊红,等.面粉增白剂过氧化苯甲酰特性与检测方法[J].粮食与油脂,2003,1:43-44．
【3】林秋萍.气相色谱法测定面粉中过氧化苯甲酰[J].食品科学,2002,23(4):97-98．
【4】GB/T 18415-2001小麦粉中过氧化苯甲酰的测定方法[S]．
【5】任清,黄建立.小麦粉中过氧化苯甲酰与苯甲酸总量的毛细管气相色谱法测定[J].分析化学,2004,32(2):221-224．
【6】Yukiko Abe-Onishi,Chikako Yomota,Naoki Sugimoto,et al.Determination of benzoyl peroxide and benzoic acid in wheat flour by high-performance liquid chromatography and its identification by high-performance liquid chromatography-mass spectrometry[J].Journal of Chromatography A,2004,1040(2):209-214．
【7】李金昶,路明昕,李力,等.高效液相色谱法分离和测定面粉中增白剂过氧化苯甲酰[J].分析化学,2002,30(7):833-835．
【8】王勤,张存玲,徐文杰.高效液相色谱法测定面粉中过氧化苯甲酰[J].理化检验-化学分册,2002,38(7):361-362．
【9】Yang Weiping,Zhang Zhujun,Hun Xu.A novel capillary microliter droplet sample injection-chemiluminescence detector and its application to the determination of benzoyl peroxide in wheat flour[J].Talanta,2004,62(4):661-666．
【10】胡章记.面粉中增白剂的紫外光度法测定[J].分析科学学报,2004,20(1):107-108．
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