A chemical probe technique for the determination of reactive halogen species in aqueous solution: Part 2 ? chloride solutions and mixed bromide/chloride solutions

C. Anastasio (1) , B. M. Matthew (1)

1 Department of Land, Air and Water Resources

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.

Domaines: Océan, Atmosphère

C. Anastasio, B. M. Matthew. A chemical probe technique for the determination of reactive halogen species in aqueous solution: Part 2 ? chloride solutions and mixed bromide/chloride solutions. Atmospheric Chemistry and Physics, 2006, 6 (9), pp.2439-2451. ⟨hal-00295957⟩