CHEMILUMINESCENCE DETERMINATION OF SULFITE IN SUGAR AND SULFUR-DIOXIDE IN AIR USING RU(BIPY)(3)(2-K2S2O8 SYSTEM())

A chemiluminescence (CL) detection method for the determination of sul fite is described. The light produced in the reaction of Ru(bipy)(3)(2 +)(bipy=2,2'-bipyridyl)-SO32--K2S2O8 is detected. The concentration of sulfite is proportional to the CL intensity in the range 1.5x10(-7) - 1.0x10(-4) mol/l. The limit of detection is 4.1x10(-8) mol/l and the relative standard deviation is 4.3% for 2x10(-5) mol/l sulfite solutio n in 9 repeated measurements. This method has been successfully applie d to the determination of sulfite in sugar and sulfur dioxide in air b y using triethanolamine (TEA) as the absorbent material.