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.
Department of Chemistry, Kyungpook National University, Taegu, South Korea.
Sang Hak
SH
Lee
Chi Wan
CW
Jeon
Saikh Mohammad
SM
Wabaidur
D001224:Aspartic Acid / Q000032:analysis*; D002138:Calibration; D028241:Camellia sinensis / Q000737:chemistry*; D002563:Cerium / Q000737:chemistry*; D007700:Kinetics; D008163:Luminescent Measurements / Q000379:methods*; D008956:Models, Chemical; D009942:Organometallic Compounds / Q000737:chemistry*; D018515:Plant Leaves / Q000737:chemistry*; D012212:Rheology; D013464:Sulfuric Acids / Q000737:chemistry
D009942:Organometallic Compounds; D013464:Sulfuric Acids; C415768:tris(2,2'-bipyridyl)ruthenium(II); D002563:Cerium; D001224:Aspartic Acid; C033158:sulfuric acid