FLOW INJECTION CHEMILUMINESCENCE DETERMINATION OF SULFIDE BY OXIDATION WITH CHLORINATED ISOCYANURATES

ABSTRACT

A rapid and sensitive flow injection chemiluminescence (CL) method is described for the determination of sulfide based on the CL generated during its reaction with either sodium dichloroisocyanurate (SDCC) and trichloroisocyanuric acid (TCCA) in alkaline medium. The results of investigation of the sensitized and non-sensitized CL reactions are presented. The emission intensity is greatly enhanced for both SDCC-sulfide and TCCA-sulfide CL systems if fluorescein (for SDCC-sulfide) and dichlorofluorescein (DCF) (for TCCA-sulfide) are present in the reaction solutions, respectively. The effect of analytical and flow injection variables on these CL systems and on the determination of sulfide are discussed. The method was applied satisfactorily to the determination of sulfide in spring water samples.

Keywords:

• Chemiluminescence (CL)
• Sulfide
• Sodium dichloroisocyanurate (SDCC)
• Trichloroisocyanuric acid (TCCA)
• Flow injection analysis (FIA)

ACKNOWLEDGMENTS

The authors wish to express their gratitude to Shiraz University Research Council for the support of this work.