天然食用植物色素山兰红的研究

Studies on a Natural Food Pigment from Peristophe Lanceolia

由爵床科植物五指山兰(Peristophe lanceolia Nees)的嫩枝和叶提制而得的一种食用天然色素,被命名为山兰红色素。该色素属水溶性,提取得率为4～8％,pH6.8～8时最大吸收峰波长为580nm,pH3～6.4时最大吸收峰波长为480nm,颜色随pH而变化,中性色素液强日晒5小时,颜色由暗紫变为红紫。100℃加热两小时,pH4色素液变化不大,更加清澈透明,pH7色素液颜色变浅而透明,较玫瑰茄色素稳定,色价E_1cm^10％=2278(580nm),主要色素成分为天竹葵宁-3-β-葡萄糖苷。食用安全,可用于饮料,低度酒,米制品等着色。

A food pigment was obtained from Peristophe Lanceolia Nees (Acanthanceae) collected in Xishuangbanan the Yao Nationality folk. This pigment was named 'lanceolin red' the extracting rate was 4-8% for fresh branches and leaves of the plant. The principle pigment constituent of 'lanceolin red' is pelargonidin-3-β-glu-coside. The colour of pigment changes with pH value give red colour , purple colour and hlue colour et al. E1cm10% = 2278 (580nm). The results of the solubility ,colour reaction, stability and safety tests showed that 'lanceolin red' pigment could be used in beverage, wine, rice foods.