| 铁(Ⅱ)-邻菲罗啉-BPR体系分光光度法测定果蔬中的维生素C |
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| 引用本文： | 黄宝华,罗宗铭.铁(Ⅱ)-邻菲罗啉-BPR体系分光光度法测定果蔬中的维生素C[J].化学世界,1999,40(6):319-321. |
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| 作者姓名： | 黄宝华 罗宗铭 |
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| 作者单位： | 广东工业大学化工系 |
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| 摘 要： | 在ｐＨ６．０的乙酸－乙酸钠缓冲溶液体系中，有ＣＴＭＡＢ存在下，维生素Ｃ将铁（Ⅲ）－邻菲罗啉还原，还原产物与溴邻苯三酚红（ＢＰＲ）形成铁（Ⅱ）－邻菲罗啉－ＢＰＲ缔合物，其λｍａｘ＝５８０ｎｍ，ε＝１．０９×１０５Ｌ·ｍｏｌ－１·ｃｍ－１，维生素Ｃ含量在０～７０μｇ·２５ｍＬ－１范围内服从比耳定律。此法用于测定新鲜果蔬中的维生素Ｃ获得较满意的结果
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| 关 键 词： | 维生素C 铁（Ⅱ）－邻菲罗啉－BPR 缔合物 分光光度法 |
Spectrophotometric Determination of Vitamin C in Fruits and Vegetables by Fe()1,10PhenanthrolineBPR System |
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| Huang BaohuaLuo ZhongmingFang YanxiongLin Jianliang.Spectrophotometric Determination of Vitamin C in Fruits and Vegetables by Fe()1,10PhenanthrolineBPR System[J].Chemical World,1999,40(6):319-321. |
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| Authors: | Huang BaohuaLuo ZhongmingFang YanxiongLin Jianliang |
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| Abstract: | In HAcNaAc buffer solution (pH6.0) Fe()1,10phenanthroline is reduced by vitamin C to form Fe()1,10phenanthrolineBPR association compound in the presence of CTMAB. This compound has a maximum absorption at 580nm. Beer's law is obeyed in the range of 070 g/25 mL. This molar absorptivity is 1.09105 Lmol-1cm-1. This method has been applied to the determination of vitamin C in several kinds of fruits and vegetables with satisfactory results. |
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| Keywords: | vitamin CFe()1 10phenanthrolineBPR association compoundspectrophotometry |
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