Analytical Sciences

Determination of Carbamazepine by Chemiluminescence Detection Using Chemically Prepared Tris(2,2'-bipyridine)ruthenium(III) as Oxidant

Sang Hak LEE,*  Ming LI,* and Jung Kee SUH**

*Department of Chemistry, Kyungpook National University, Taegu 702-701, Korea
**Korea Research Institute of Standards and Science, Taejon 305-600, Korea

A new chemiluminescence method for the determination of carbamazepine (CBZ) has been developed. The method is based on the chemiluminescence produced in the reaction of tris(2,2'-bipyridine)ruthenium(III) and CBZ in an acidic medium. The chemiluminescence intensity was enhanced by organic solvents in the reaction system. Under the optimum experimental conditions, the calibration curve was linear over the range 4.0 x 10^-3 - 8.6 x 10^-7 mol/L for CBZ. The detection limit (S/N = 3) was 2.5 x 10^-7 mol/L and the relative standard deviation of six replicate measurements was 2.6% for 4.0 x 10.4^-4 mol/L of CBZ. The possible reaction mechanism were also discussed. The chemiluminescence method was successfully applied to assay the CBZ contents in pharmaceutical tablets.

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