西藏核桃果皮色素的提取与吸光度测定  

EXTACTION OF THE TIBETAN WALNUT PEEL PIGMENTS AND DETERMINATION FOR ITS ABSORBANCE

作　　者：措加旺姆[1] 诺桑[1] 罗布[1] 姚四堂[1] 卓嘎[1] 次仁央金[1] 

机构地区：[1]西藏大学地球物理研究所,西藏拉萨850000

出　　处：《中国科技信息》2012年第18期59-60,共2页China Science and Technology Information

基　　金：国家科技部项目建立西藏染料敏化太阳能电池试产平台(2009DFA60750);西藏自治区科技厅自然科学基金项目西藏天然色素敏化太阳能电池研究;西藏大学珠峰学者培养项目

摘　　要：天然植物色素可以作为研制染料敏化太阳能电池的一种颜料(光敏剂)。西藏核桃果皮富含丰富色素,本文利用萃取、色谱分离技术提取了西藏林芝核桃果皮色素。用蒸馏水从500g干核桃果皮中提取获得了21.03g色素,产率达4.21%。用四氯化碳从500g鲜核桃果皮中提取获得了0.35g色素。利用紫外可见光度计对以上两种萃取流程获得的色素进行了吸光度测定。结果显示核桃果皮色素对波长越短的光吸收能力越强。紫外区有最大的吸光度,然后随着波长的增大,吸光度逐渐变小。为今后研制色素增感型太阳能电池提供了萃取色素颜料技术。The natural plant pigments are pigment material （photosensitizer） for developing dye-sensitized solar cells. The Tibetan walnut peels are rich in pigments, we extract Tibetan Linzhi walnut peel pigments through using chromatographic separation techniques. We extract 21 .03g pigment from 500g of dried walnuts peels by using distilled water, and yields productivity of 4.21%. Extract 0.35g pigment from 500g of fresh walnuts by using carbon tetrachloride extractor. We determine absorbance for the above two pigments obtained through different extracting processes by using UV--Vis spectrometer. The results show that the walnut peel pigment has stronger absorption on the shorter wavelengths of light. In the UV radiation region has maximum absorbance, and as the wavelength increases, the absorbance becomes smaller. The work could provide extraction techniques fop raw pigment materials to develop dye--sensitized solar cells.

关 键 词：萃取 核桃色素 吸光度 染料敏化太阳能电池 

分 类 号：TS209[轻工技术与工程—食品科学]