食品科学2012，Vol.33Issue(19)：35-38,4.
不同pH值条件下火龙果色素的降解动力学
Degradation Kinetics of Pigments from Pitaya (Hylocereus polyrhizus) under Different pH Conditions
摘要
Abstract
The effect of pH 2.0—9.0 on the maximum absorption wavelength of pitaya pigment extract was analyzed. Meanwhile, we studied the degradation kinetics of the pigment extract. It was found that pitaya pigment extract showed maximum absorption at 532, 534, 536, 534, 535, 536, 538 nm and 543 nm, respectively under the conditions of 28℃ and pH 2.0—9.0. The degradation of the extract obeyedfi rst-order reaction at specifi c pH levels. A parabolic relationship between rate constant (k) and pH was found. At pH levels between 4.0 and 6.0, smallerk values were obtained and the extract was stable.关键词
火龙果/甜菜苷/降解/动力学Key words
pitaya (Hylocereus polyrhizus)/betanin/degradation/kinetics分类
轻工纺织引用本文复制引用
叶丽君,邵伟琪,王兴莉,黄雪松..不同pH值条件下火龙果色素的降解动力学[J].食品科学,2012,33(19):35-38,4.基金项目
“十二五”国家科技支撑计划项目(2012BAD031B03)；农业部公益性行业(农业)科研专项(210303077) （2012BAD031B03）
