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IJCT Vol.14(4) [July 2007] >


Title: Retention behaviour of synthetic dyes on coconut oil impregnated egg shell layers in pure and mixed solvent systems
Authors: Misra, Aditya Kumar
Keywords: TLC
Synthetic dyes
Impregnated layers
Coconut oil
Mixed solvent systems
Issue Date: Jul-2007
Publisher: CSIR
IPC CodeC09B57/00
Abstract: The retention behaviour of twenty four anionic, cationic, sulphonated and amphoteric synthetic dyes has been examined on plain and coconut oil impregnated egg shell layers using pure methanol, pure acetonitrile and methanol-water, acetonitrile-water, acetonitrile-methanol and acetonitrile-acetone mixed mobile phases. The mobile phase composition and the effect of solubility of dyes on hRք values have been discussed. The mechanism of migration is explained in terms of partition on impregnated egg shell layers and the polarity of the mobile phase used. The acetonitrile-acetone (75:25) system was found to be most effective and gave several quaternary separations of dyes. A large number of separations of same coloured dyes as well as having approximately similar structural formula have been achieved. The separation of acidic dyes from basic dyes; acidic dyes from acidic dyes; and acidic dyes from amphoteric dyes are of special interest.
Page(s): 407-411
ISSN: 0971–457X
Source:IJCT Vol.14(4) [July 2007]

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