title: A study on the applicability of zinc acetate impregnated silica substrate in the collection of hydrogen sulfide by active sampling.
abstract: A novel substrate for the hydrogen sulfide determination in air was developed based on zinc acetate impregnated silica in glass tubes. Collected H2S is quantified by ion chromatography after sulfide oxidation to sulfate in an alkaline solution of H2O2. Laboratory tests were conducted in controlled atmosphere to evaluate uptake rate, linearity, sample stability, influence of relative humidity and interfering gases. A pilot study was also conducted in the field in order to assess the applicability of the substrate and to understand the effect that gases such NO2 and CH4 can have on the efficiency of collection of H2S. The new substrate has shown to have several advantages with respect to the charcoal substrate, that is the one of choice as reported by National Institute of Occupational Safety and Health (NIOSH) method. In particular it does not suffer from sulfur background and it is not influenced by interfering gases such as NO2 and CH4.
authors: Department of Educational Philosophic and Human Science, University of Salerno, via Giovanni Paolo II 132, 84084 Fisciano (SA), Italy.
authors: Oriana
authors: O
authors: Motta
authors: Department of Chemistry and Biology, University of Salerno, via Giovanni Paolo II 132, 84084 Fisciano (SA), Italy.
authors: Raffaele
authors: R
authors: Cucciniello
authors: Sicilian Laboratory of Analytical and Environmental Consulting, via Matilde Serao 15/A, 95037 San Giovanni La Punta (CT), Italy.
authors: Claudio
authors: C
authors: Scicali
authors: Department of Chemistry and Biology, University of Salerno, via Giovanni Paolo II 132, 84084 Fisciano (SA), Italy. Electronic address: aproto@unisa.it.
authors: Antonio
authors: A
authors: Proto
mesh_terms: D000393:Air Pollutants / Q000032:analysis* / Q000737:chemistry / Q000302:isolation & purification; D001272:Atmosphere / Q000032:analysis / Q000737:chemistry; D002845:Chromatography / Q000379:methods; D002852:Chromatography, Ion Exchange; D004784:Environmental Monitoring / Q000379:methods; D006861:Hydrogen Peroxide / Q000737:chemistry; D006862:Hydrogen Sulfide / Q000032:analysis* / Q000737:chemistry / Q000302:isolation & purification; D007477:Ions / Q000737:chemistry; D008697:Methane / Q000737:chemistry; D009585:Nitrogen Dioxide / Q000737:chemistry; D010084:Oxidation-Reduction; D010865:Pilot Projects; D015203:Reproducibility of Results; D012822:Silicon Dioxide / Q000737:chemistry*; D019345:Zinc Acetate / Q000737:chemistry*
chemical_list: D000393:Air Pollutants; D007477:Ions; D012822:Silicon Dioxide; D006861:Hydrogen Peroxide; D019345:Zinc Acetate; D008697:Methane; D009585:Nitrogen Dioxide; D006862:Hydrogen Sulfide
keywords: Air sampling; Biogas; Hydrogen sulfide; Ion chromatography; Zinc acetate