摘要
试验的火龙果皮红色素只溶于水,不溶于有机溶剂;在PH=5~6能保持原本的鲜红色,其它PH值均使色素颜色发生变化,λmax也发生变化;火龙果红色素在PH=6时光热稳定性相对最好,室内日光灯光照12h,红色稍变淡,A530降低8%,80℃加热40min红色变淡,A530降低28.5%;0.01mol/L的Na+、K+、Ca2+、Mg2+对火龙果红色素无影响,0.01mol/L的Al3+、Cu2+F、e3+使火龙果红色素变色。经化学显色推断火龙果皮色素中有花色苷和原花色素。
Red pigment of pitaya peel only could be solvated in water and not organic solvent. It retained brilliant red only when PH=56, but changed in other PH and _(max) also changed. Its stability on light and heat was relative best in PH=6,it's A_(530) decreased 8% when lighted 12 hours in room by fluorescent lamp and decreased 28.5% and red paled a little when heated for 40 minutes in 80, 0.01mol/L Na^+K^+ Ca^(2+)Mg^(2+) hadn't effect on the red pigment but Al^(3+)Cu^(2+)Fe^(3+) made it change colour. The pigment of pitaya peel was determined to be anthocyanins and proanthocyanidins.
出处
《茂名学院学报》
2005年第3期5-7,共3页
Journal of Maoming College
关键词
火龙果皮
红色素
稳定性
花色苷
<Keyword>pitaya peel
red-pigment
stability
anthocyanins
