| 紫甘薯色素理化性质及稳定性研究 |
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| 引用本文： | 彭常安,付严萍,刘永,王庆南,韩永斌.紫甘薯色素理化性质及稳定性研究[J].安徽农业大学学报,2012,39(3):407-411. |
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| 作者姓名： | 彭常安 付严萍 刘永 王庆南 韩永斌 |
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| 作者单位： | 芜湖职业技术学院生物工程系,芜湖,241006;南京农业大学食品科技学院,南京,210095;江苏省丘陵山区南京市农科所,南京,210013 |
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| 基金项目： | 安徽高等学校省级自然科学研究项目(KJ2011Z402);苏北科技发展计划项目(BC2010424);江苏高校优势学科建设工程项目共同资助 |
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| 摘 要： | 研究了紫甘薯色素在不同溶剂中的溶解性和光谱学特性,pH值、温度、光照、H2O2、Vc和Fe3+、Al3+、Zn2+、Cu2+对其稳定性的影响。结果表明,紫甘薯色素为花色苷类色素,易溶于水、甲醇、乙醇等极性溶剂,不溶于丙酮、乙酸乙酯、乙醚和石油醚;紫甘薯色素在pH 1.0～3.0时保持稳定,色泽鲜红;随pH值升高,其解指数增大;温度超过60℃时,色素的稳定性迅速下降;连续光照8 d后色素的保存率为87%;色素的耐氧化和耐抗坏血酸较差;A13+和Zn2+有利于提高色素稳定性,且有一定程度的护色效果,而Fe3+对其有破坏作用。
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| 关 键 词： | 紫甘薯 色素 理化性质 稳定性 |
Physico-chemical properties and stability of pigment from purple sweet potato |
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| PENG Chang-an,FU Yan-ping,LIU Yong,WANG Qing-nan and HAN Yong-bin.Physico-chemical properties and stability of pigment from purple sweet potato[J].Journal of Anhui Agricultural University,2012,39(3):407-411. |
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| Authors: | PENG Chang-an FU Yan-ping LIU Yong WANG Qing-nan and HAN Yong-bin |
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| Institution: | 1.Department of Bioengineering,Wuhu Vocational & Technical College,Wuhu 241006; 2.College of Food Science and Technology,Nanjing Agricultural University,Nanjing 210095; 3.Nanjing Institute of Agricultural Science of the Jiangsu Hilly District,Nanjing 210013) |
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| Abstract: | The solubility in different solvents and the absorbance spectrum of purple sweet potato pigment(PSPP) from Ipomoea batatas Lam were observed,and the effects of pH value,temperature,lighting,H2O2,Vc and Fe3+,Al3+,Zn2+,Cu2+ on PSPP stability were investigated.The result showed that PSPP is water soluble pigment.At the range of pH value from 1.0 to 3.0,PSPP water solution has a bright color and PSPP keeps sta-ble very well.With the increase of pH value,its degradation index increases.When temperature is over 60℃,the stability of PSPP decreases quickly.After accepting 8 day’s successive lighting,the retention rate of PSPP was 87%.The pigment has a low stability to H2O2 and Vc.And the A13+,Zn2+ could improve the stability of PSPP,but Fe3+ could damage it. |
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| Keywords: | purple sweet potato pigment physico-chemical properties stability |
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