老鹰茶(豹皮樟)天然食用色素的初步研究

研究了老鹰茶（豹皮樟）天然食用色素的提取工艺、理化特性及其稳定性。利用色素的光谱性质，研究了该色素对酸、碱的稳定性、耐热性、耐光性以及与常用食品添加剂和不同金属离子的作用。结果表明：该色素为水溶性色素，以大孔吸附树脂提取，可获得较高的提取率；该色素在不同的酸、碱介质和金属离子中颜色不同、光谱性质不同（Ca^2 、Fe^2 使色素的光吸收增强，而其它金属离子使色素的光吸收减小。）但对热较稳定，且一定的耐光性及抗氧化性。结果表明：老鹰茶（豹皮樟）红色素是一种具有开发价值的天然食用色素。

The Preliminary Studies on a Natural Food Pigment Extracted from Hawk - tea (Litsea coreana)

Inthis paper,thetechnologyofextr action?thephysicalandchemicalpropertie s andthestabilityofanatural foodpigmentfromLitseacoreanawerestudied.Bytestingthespectrumpr operties ofthepigment,theeffecto fpHvalue?temperature?illumination?different metal ions and food additi ves onstability of the pigment were m ainly assayed.The results showed that the pigment melt ed in water.The extraction rate of th e pigment was higher by using macrore ticular resin.The colour and spectrumproperties of the pigment were different i n the solution of different pHvalue a nd metal ions.(The ABS of pigmentwas increasedbyth eCa 2+ andFe 2+ ,onthe contrary,itwas reducedbyth eother metalions.)But the opigment was stable for temperature variations and could resist t he effect of slight illumination and some oxi-dizer.So,according to the above results,the red pigment fromLitsea coreana was a kind of natural food pigmen t which could be well developed.