Chemiluminescence detection of isoniazid using Ru(phen)3(2+)-isoniazid-Ce(IV) system

In our experiment, it was observed that isoniazid could enhance the chemiluminescence (CL) emission of tris-(1,10-phenanthroline)ruthenium(II) (Ru(phen)3(2+))-cerium(IV) (Ce(IV)) system and this enhancement effect was dependent on the concentration of isoniazid, based on which, a novel CL system was established for the detection of isoniazid. Under the optimum experimental conditions, the dynamic range and detection limit are 7.0 x 10(-2) to 6.5 microg ml(-1) and 2.5 x 10(-2) microg ml(-1), respectively. The R.S.D. is 3.4% (n = 11). The proposed method has been applied to detect the content of isoniazid in the injection solution with satisfactory results. The possible mechanism of the CL reaction was studied.