| pH和Fe~(3+)对番薯紫色素稳定性的影响研究 |
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| 引用本文： | 郑成,张新强,杨联锋,凌剑辉,毛桃嫣,周勇强.pH和Fe~(3+)对番薯紫色素稳定性的影响研究[J].应用化工,2008,37(5):526-529. |
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| 作者姓名： | 郑成 张新强 杨联锋 凌剑辉 毛桃嫣 周勇强 |
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| 作者单位： | 广州大学化学化工学院,广东广州,510006 |
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| 摘 要： | 研究了番薯紫色素稳定性及其变色反应机理,选择了辅色剂和护色剂来增加其显色效果和稳定性。结果表明,pH值和Fe3+是引起番薯紫色素变色和褪色的主要原因;EDTA-2Na有护色作用,Fe3+有辅色作用,两者协同作用能够增加其显色和稳定性,当两者浓度比为0.5∶1时,协同效果最好,增色率达到37%,转化率降低了32.2%。
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| 关 键 词： | 番薯紫色素 护色剂 辅色剂 稳定性 |
| 文章编号： | 1671-3206(2008)05-0526-04 |
| 修稿时间： | 2008年2月26日 |
Study on effect of pH and Fe3+ on stability of purple sweet potato pigment |
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| ZHENG Cheng,ZHANG Xin-qiang,YANG Lian-feng,LING Jian-hui,MAO Tao-yan,ZHOU Yong-qiang.Study on effect of pH and Fe3+ on stability of purple sweet potato pigment[J].Applied chemical industry,2008,37(5):526-529. |
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| Authors: | ZHENG Cheng ZHANG Xin-qiang YANG Lian-feng LING Jian-hui MAO Tao-yan ZHOU Yong-qiang |
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| Abstract: | The stability and the mechanism of discolor reaction of purple sweet potato pigment(PSPP) were studied.In order to increase PSPP color and stability,a color developer and a color protection agent were selected.The results showed that pH and Fe3+ were the main factors of changing and fading of PSPP.EDTA-2Na had an effect of keeping color and Fe3+ had copigmentation to PSPP.Their synergism could increase its color and stability.The most suitable concentration ratio of EDTA-2Na and Fe3+ was 0.5 ∶1.In this condition,color promoting rate was 37.6% and conversion was reduced by 32.2%. |
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| Keywords: | purple sweet potato pigment color protection agent color developer stability |
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