Electrophoretic separation peak area and e.e.% value of the d/l-Gln mixed solution before and after adsorption.

Sample	Peak area	e.e.%
l-Glna	755.3	0.2%
d-Glna	758.9
l-Glnb	419.1	6.2%
l-Glnb	370.8

^aThe peak area before adsorption.

^bThe peak area after adsorption.