title: A high performance liquid chromatography method for determination of gas-phase hydrogen peroxide in ambient air using Fenton's chemistry.
abstract: A new method for determination of hydrogen peroxide in atmospheric samples is described. Cryogenically collected H2O2 is reacted with sodium salicylate in the presence of Fe(2+) to produce dihydroxybenzoate, which is separated from the reaction mixture by high performance liquid chromatography and detected by UV absorption. Measurements of atmospheric H2O2 were conducted in Las Vegas, NV from June 1999 to December 1999 to evaluate and characterize the method. Measured mixing ratios of H2O2 (there were also non-detects) ranged from 0.012 to 2.74 ppbv, with expected correlations to primary gaseous pollutants and strong seasonal variation consistent with a photochemically derived species. It was concluded that the method is easy to use and has sufficient sensitivity and selectivity to be useful in atmospheric monitoring.
authors.affiliation: Department of Chemistry, University of Nevada, 4505 Maryland Parkway, Las Vegas, NV 89154-4003, USA.
authors.forename: Jun
authors.initials: J
authors.lastname: Liu
authors.forename: Spencer M
authors.initials: SM
authors.lastname: Steinberg
authors.forename: Brian J
authors.initials: BJ
authors.lastname: Johnson
mesh_terms: D000397:Air Pollution / Q000032:analysis*; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D005296:Ferrous Compounds / Q000737:chemistry*; D005740:Gases; D006861:Hydrogen Peroxide / Q000032:analysis*; D062385:Hydroxybenzoates / Q000032:analysis / Q000737:chemistry; D017665:Hydroxyl Radical / Q000032:analysis / Q000737:chemistry; D010777:Photochemistry; D012621:Seasons; D012680:Sensitivity and Specificity; D012980:Sodium Salicylate / Q000737:chemistry
chemical_list: D005296:Ferrous Compounds; D005740:Gases; D062385:Hydroxybenzoates; D017665:Hydroxyl Radical; D006861:Hydrogen Peroxide; D012980:Sodium Salicylate