Effect of some anions on the mobility of amino acids in soils by thin layer chromatography

The mobility rate of some cyclic and aliphatic amino acids in terms of Rf values by using soil-thin layer chromatography shows the following order: glutamic acid > histidine > valine > leucine > serine > alanine. After conducting the studies to determine the effect of some anions, viz. MoO4(2-), B4O7(2-), C2O4(2-),CO3(2-), HCO3- and H2PO4- on the mobility of those amino acids, the mobility of the amino acids was found to increase with the increasing concentration of these anions up to a certain limit and thereafter the mobility rate declined except in case of glutamic acid which shows a fall in its movement throughout the entire range of their application in all cases. The results have been explained on the basis of a reaction mechanism involved in the interaction of these anionic species with soil colloids and amino acids in soil solution.