Sensitization of surfactants on the chemiluminescence reaction of fluorescein isothiocyanate labeled proteins

The effect of surfactants on fluorescein isothiocyanate (FITC)–bovine serum albumin (BSA)–hypochlorite (ClO⁻), FITC–human serum albumin (HSA)–ClO⁻, FITC–ovoconalbumin (OVA)–ClO⁻, FITC–hemoglobin (Hb)–ClO⁻ systems were investigated with chemiluminescence method by the reversed phase flow injection. It was found that the chemiluminescence (CL) intensity of each system was increased greatly in the presence of cationic surfactants. Cethyltrimethylammonium bromide (CTAB) is the optimal surfactant of these systems. The optimal conditions of the CL reaction and the optimal concentration of CTAB were examined and the function of cationic surfactant CTAB on the CL reaction was also discussed.