Flow-injection chemiluminescence determination of aspartic acid in tea leaves using tris (2,2'-bipyridyl) ruthenium (II)-Ce(IV) system.

A flow injection chemiluminescence (CL) determination of aspartic acid is described. In this work, it was observed that aspartic acid could enhance the chemiluminescence (CL) emission of Ru(bipy)3(2+)-Ce(IV) system and this enhancement effect was dependent on the concentration of aspartic acid, based on which, CL system was established for the determination of aspartic acid. Under the optimum experimental conditions, the linear range and detection limit are 2 x 10(-7)-1.3 x 10(-5) M and 1.5 x 10-(8) M, respectively. The R.S.D. is 1.75%. (n = 10). The proposed method has been applied to detect the content of aspartic acid in tea leaves with satisfactory results. The possible mechanism of the CL reaction was discussed.