Flow-injection chemiluminescence determination of chlorinated isocyanuric acids.
A rapid and sensitive flow-injection chemiluminescence method is described for the determination of dichloro- and trichloroisocyanuric acids based on the chemiluminescence produced during their reaction with luminol in alkaline medium. The effects of analytical and flow-injection variables on these chemiluminescence systems and determination of both oxidants are discussed. The optimized method yielded 3sigma detection limits of 8x10(-8) and 5x10(-8) mol L(-1) for the sodium dichloroisocyanurate and trichloroisocyanuric acid, respectively. The optimum conditions were found to be as follows: NaOH, 1x10(-1) mol L(-1); luminol, 5x10(-3) mol L(-1); KI, 2x10(-3) mol L(-1) and flow rate, 3.5 mL min(-1).
Safavi
Afsaneh
A
Department of Chemistry, Faculty of Sciences, Shiraz University, Iran. safavi@chem.susc.ac.ir
Karimi
Mohammad Ali
MA
D003902:Detergents / Q000032:analysis; D004202:Disinfectants / Q000032:analysis*; D005618:Fresh Water / Q000032:analysis; D007202:Indicators and Reagents; D008163:Luminescent Measurements; D008165:Luminol; D008722:Methods; D012680:Sensitivity and Specificity; D014227:Triazines / Q000032:analysis*
D003902:Detergents; D004202:Disinfectants; D007202:Indicators and Reagents; D014227:Triazines; D008165:Luminol; C011765:troclosene; C051718:symclosene