Analysis of major compositions in ethanol extract from natural green cotton based on GC-MS

The natural green cotton was extracted with ethanol in order to study its subsidiary compositions.The extract was analyzed with GC-MS and compared with that of white cotton.The chief volatile substances of the two were found to be nearly the same,which include 2-methyl allylamine,2-cyclohexen-1-ol,2-methyl-5-(1-methylethenyl)-1-propanoate,diaminomaleonitrile,2-(acryloyloxy)ethyl methacrylate and 2,4-di-tert-butylphenol,and 2-methyl-5-(1-methylethenyl)-1-propanoate has the highest content.Meanwhile,green cotton contains a substance called isobutyl methacrylate which does not exist in white cotton.The results showed that natural green cotton really has components that white cotton dose not contain.How the components affect the color of natural green cotton needs further study.