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Effect of the distance moved by the solvent on the rf values in circular chromatography

✍ Scribed by D.P. Burma; H.C. Chakrabortty

Publisher
Elsevier Science
Year
1955
Tongue
English
Weight
448 KB
Volume
13
Category
Article
ISSN
0003-2670

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✦ Synopsis

EFFECT OF THE DISTANCE MOVED BY THE SOLVENT ON THE RI, VALUES IN CIRCULAR CHROMATOGRAPHY * RAO AND CIRI', while stuclying the dcpenclencc of I?,.-value on the distance moved hy the solvent in their cspcrimcnts on circular paper chromatography obscrvcd that tk! I'). values

of the amino acids at first increase with the distance travcllcd by the solvent from 5 cm to IO cm and then dccrcase as the distance is increased from IO cm to rg cm. The dccrcasc in XI,-values with increasing distance may bc accounted for hy the gra+al loss of the acid as well as the water contents as the dcvcloping solvent movcsl~~~ but the incrcasc in I?*.. values could not be cxplaincd. According to the partition mechanism of pupcr chromatography3 the XI,. values should be fairly indcpcndent of the distance moved by the solvent ; this was found to be so4 in cast of strip chromatography, though ~<OWKARANY AND CASSIDY~ obscrvcd that thcrc was slight increase in XI.-values up to a point.

The R,; vnlucs of the amino acids given by 13~0 AND l3nru~, also on the basis of circular paper chromatograms arc much higher than those obtained by GIN';, and * A prclimir:nry note has been published in Sciorcc at& Cdfwe,

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