多花山竹子黄色素的提取及其稳定性的初步研究

STUDY ON THE STABILITY OF THE XANTHIN OF GARCINIA MULTIFLORA

初步探讨了多花山子黄色素的提取工艺条件及理化稳定性．研究结果表明：本色素的较佳提取条件为用95％酒精（物料比1：1．5）在50℃下浸提4h；该色素只有在较强的碱性（pH11以上）、50℃以下的环境中较稳定，才表现出亮黄色．弱碱、酸性和高于50℃的环境中，本色素受到破坏，表现为颜色明显变浅，出现浑浊，甚至完全失色；Fe^(3+)、Al^(3+)、Na^+等金属离子对本色素基本无影响，而Sn^(2+)、Cu^(2+)离子和蔗糖会破坏本色素，使其颜色变浅且出现沉淀，在波长400～500nm的可见光范围内不出现吸收峰．本色素在光照环境下不稳定、褪色明显．

in this bode, the elemts Of extlacting the xanthin Of Garehaa multillola and it's stablity are studied. The results show that the xanthen is ho extiactal at 50t and the mixture Of I Partbolt and I .5 ports 95% ethanol for 4 hare. This xanthin is stable Only in higher alkinity (up PH =l I ) and under 5()t. The canons Of i~, aldrinium and editnn have little effect on the colour of thispi~, but the canons of hn, copper and sUgar would destIDy it. This xanthin should be ~d inthe darkness.