Chemiluminescence Determination of Sulfite in Sugar and Sulfur Dioxide in Air Using Ru(bipy)₃²⁺-K₂S₂O₈ System

Abstract

A chemiluminescence (CL) detection method for the determination of sulfite is described. The light produced in the reac-tion of Ru(bipy)₃²⁺(bipy=2,2′-bipyridyl)-SO₃^2--K₂S₂O₈ is detected. The concentration of sulfite is proportional to the CL intensity in the range 1.5×10^-7 - 1.0×10^-4 mol/l. The limit of detection is 4.1×10^-8 mol/l and the relative standard devia-tion is 4.3% for 2×10^-5 mol/l sulfite solution in 9 repeated measurements. This method has been successfully applied to the determination of sulfite in sugar and sulfur dioxide in air by using triethanolamine (TEA) as the absorbent material.