A chemical probe technique for the determination of reactive halogen species in aqueous solution: Part 2 – chloride solutions and mixed bromide/chloride solutions
1Atmospheric Science Program, Department of Land, Air & Water Resources, University of California, Davis, USA
*now at: Hach Company, Loveland, Colorado, USA
Abstract. Although reactive halogen species (X*=X•, •X2-, X2 and HOX, where X=Br, Cl, or I) are important environmental oxidants, relatively little is known about their kinetics in condensed phases such as seawater and sea-salt particles. Here we describe a new technique to determine reactive chlorine and bromine species in aqueous solutions by using allyl alcohol (CH2=CHCH2OH) as a chemical probe. This probe is combined with competition kinetics in order to determine steady state concentrations of X*(aq). In some cases the technique also can be used to determine the rates of formation and lifetimes of X* in aqueous solution. In a companion paper we reported the results of our method development for aqueous solutions containing only bromide (Br-). In this paper, we discuss method development for solutions containing chloride (Cl-) alone, and for solutions containing both bromide and chloride.
Citation: Anastasio, C. and Matthew, B. M.: A chemical probe technique for the determination of reactive halogen species in aqueous solution: Part 2 – chloride solutions and mixed bromide/chloride solutions, Atmos. Chem. Phys., 6, 2439-2451, doi:10.5194/acp-6-2439-2006, 2006.