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- W320410295 abstract "The content,color scale,purity and structure of bixin in annatto seeds in xishuangbanna and its technology conditions of extracting and crystal preparation were studied e in this paper.Results showed that the content of bixin in annatto seeds in xishuangbanna was 1.2%.Extracting conditions of 100-g level were as follows: ethyl acetate was the solvent,the ratio of raw material to solvent was 1:3,the temperature was 60℃,the time was 20min and extracting for 3 times.On this condition,the extracting rate of bixin was(85±1)%.The condition of optimum purification was standing with ethanol solution at 5℃ for 3.5 h,and the crystal of bixin was obtained,its content was 98.3 %,color scale was 282.7,the crystal rate was 90% and the recrystal rate was 83.3%.The chemical composition and structure of the bixin were characterized by MS,1H-NMR and 13C-NMR,which showed it had higher purity and did not produce trans-cisisomerization and thermal degradation." @default.
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- W320410295 date "2009-01-01" @default.
- W320410295 modified "2023-09-24" @default.
- W320410295 title "Study on preparation technology of bixin from annatto seeds in Xishuangbanna." @default.
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