| 三种食用色素的电化学行为的理论计算与验证 |
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| 引用本文： | 宋远志,徐继明. 三种食用色素的电化学行为的理论计算与验证[J]. 理化检验(化学分册), 2006, 42(12): 1037-1039,1041 |
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| 作者姓名： | 宋远志 徐继明 |
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| 作者单位： | 淮阴师范学院,化学系,淮安,223300;淮阴师范学院,化学系,淮安,223300 |
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| 基金项目： | 江苏省教育厅自然科学基金资助项目（04KJD150038） |
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| 摘 要： | 用量子理论计算柠檬黄、日落黄、胭脂红的相对焓（Hm）、相对熵（Sm），计算柠檬黄、日落黄、胭脂红的还原电位分别为-0．969，-0．901，-0．854V（vs．Ag／AgCl／Cl）。探讨了琼脂对色素的电催化机理，采用循环伏安法在玻碳琼脂电极上研究了食用色素柠檬黄、日落黄、胭脂红的电化学行为，分别于-1．064，-0．910，-0．882V（vs．Ag／AgCl／Cl）产生还原峰，理论预测与试验结果基本一致。
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| 关 键 词： | 循环伏安法 电化学行为 柠檬黄 日落黄 胭脂红 |
| 文章编号： | 1001-4020（2006）12-1037-03 |
| 收稿时间： | 2005-01-17 |
| 修稿时间： | 2005-01-17 |
THEORATICAL CALCULATION OF SOME PARAMETERS OF 3 KINDS OF EDIBLE PIGMENTS RELATING TO THEIR ELECTROCHEMICAL BEHAVIORS AND THEIR EXPERIMENTAL VARIFICATION |
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| SONG Yuan-zhi,XU Ji-ming. THEORATICAL CALCULATION OF SOME PARAMETERS OF 3 KINDS OF EDIBLE PIGMENTS RELATING TO THEIR ELECTROCHEMICAL BEHAVIORS AND THEIR EXPERIMENTAL VARIFICATION[J]. Physical Testing and Chemical Analysis Part B:Chemical Analgsis, 2006, 42(12): 1037-1039,1041 |
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| Authors: | SONG Yuan-zhi XU Ji-ming |
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| Abstract: | Enthalpy(H_m) and entropy(S_m) of 3 edible pigments,tartrazine,sunset yellow and ponceau 4R,were calculated theoratically by quantum theory with their reductive potentials appeared at-0.969,0.901 and(-0.854 V)(vs.Ag/AgCl/Cl) respectively.The mechanism of electrocatalysis of agar toward the pigments was discussed.Electrochemical behaviors of the 3 pigments at the glassy carbon-agar electrode were studied by cyclic voltammetry,and their reduction peaks were observed at-1.064,0.910 and-0.882 V(vs.Ag/AgCl/Cl) which were quite close to their theoratical values. |
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| Keywords: | Cyclic voltammetry Electrochemical behavior Tartrazine Sunset yellow Ponceau 4R |
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