Articles | Volume 6, issue 9
Atmos. Chem. Phys., 6, 2439–2451, 2006
Atmos. Chem. Phys., 6, 2439–2451, 2006

  29 Jun 2006

29 Jun 2006

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

C. Anastasio1 and B. M. Matthew1,* C. Anastasio and B. M. Matthew
  • 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.

Final-revised paper