title: Determination of gas phase peroxyacetic acid using pre-column derivatization with organic sulfide reagents and liquid chromatography.
abstract: The first selective HPLC methods for the determination of peroxyacetic acid (PAA) in gas phase samples have been developed. PAA reacts with 2-([3-{2-[4-amino-2-(methylsulfanyl)phenyl]- 1-diazenyl}phenyl]sulfonyl)-1-ethanol (ADS) to form the corresponding sulfoxide. Sampling may be performed in impingers using aqueous solutions of the reagent or by test tubes with the reagent coated on a solid sorbent. Sulfide and sulfoxide are separated by means of HPLC and detected at a wavelength of 410 nm. The method is highly selective for PAA in the presence of hydrogen peroxide when sampling in impingers. A 10,000-fold excess of hydrogen peroxide leads to the same peak area compared to PAA. Limit of detection is 10(-8) mol PAA, thus corresponding to PAA concentration of 46 ppb when using a sampling time of 10 min with a flow-rate at 500 ml/min. Another sulfide reagent, methyl-p-tolyl sulfide (MTS) has been used in a similar way with impinger sampling. Major advantages of ADS towards MTS are improved UV-Vis spectroscopic properties and reduced volatility.
authors.affiliation: Westfälische Wilhelms-Universität Münster, Abteilung Analytische Chemie, Germany.
authors.forename: S
authors.initials: S
authors.lastname: Effkemann
authors.forename: S
authors.initials: S
authors.lastname: Brødsgaard
authors.forename: P
authors.initials: P
authors.lastname: Mortensen
authors.forename: S A
authors.initials: SA
authors.lastname: Linde
authors.forename: U
authors.initials: U
authors.lastname: Karst
mesh_terms: D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D005740:Gases / Q000737:chemistry*; D007202:Indicators and Reagents / Q000737:chemistry; D010463:Peracetic Acid / Q000032:analysis*; D013056:Spectrophotometry, Ultraviolet; D013440:Sulfides / Q000737:chemistry*
chemical_list: D005740:Gases; D007202:Indicators and Reagents; D013440:Sulfides; D010463:Peracetic Acid