Study on Pigment Extraction and TLC Characteristic in Natural Green Cotton Fibers

Pigments was extracted from the mature green cotton fiber with 12 kinds of neutral solution by ultrasonic wave.The result showed that the extraction of pigment in natural green fiber by using chloroform-methanol(1∶1) was the most effective.On this basis,the UV spectrum characteristic and TLC were compared with the extraction of green fiber and white fiber.The results indicated the absorbance peaks on the UV spectrum between green cotton and white cotton was different,the green cotton maximum absorbance peak at 329nm.There was a different fraction on the TLC of green cotton fiber comparing with white cotton fiber,and the Rf value of the different fraction was 0.41.