title: Comparison of two methods of measuring wood pyrolysis tar.
abstract: Two methods for the sampling and analysis of tar produced from wood pyrolysis were compared. The first method used a conventional cold-trapping technique in solvent-filled impingers followed by liquid injection. The second one is a new application of multibed solid-phase adsorbent (SPA) tubes followed by thermal desorption (TD). Both methods are based on gas chromatography (GC) coupled with mass spectrometry (MS). Quantification was performed with a well reproducible GC-MS method with three internal deuterated standards. The SPA/TD method offers several advantages. No solvent is required, the detection levels are improved, and gas chromatography separation is easier. Moreover, sampling time is reduced from about 1h (for the conventional cold-trapping technique in impingers) to a few seconds. No discrimination was observed between the two sampling methods for the 10 quantified compounds (aromatic compounds from benzene to phenanthrene and phenols) except for benzene.
authors.affiliation: Gaz de France, Research & Development Division, 361 avenue du Président Wilson, 93 211, Saint Denis la Plaine Cedex, France. anthony.dufour@yahoo.fr
authors.forename: A
authors.initials: A
authors.lastname: Dufour
authors.forename: P
authors.initials: P
authors.lastname: Girods
authors.forename: E
authors.initials: E
authors.lastname: Masson
authors.forename: S
authors.initials: S
authors.lastname: Normand
authors.forename: Y
authors.initials: Y
authors.lastname: Rogaume
authors.forename: A
authors.initials: A
authors.lastname: Zoulalian
mesh_terms: D008401:Gas Chromatography-Mass Spectrometry / Q000295:instrumentation / Q000379:methods*; D006841:Hydrocarbons, Aromatic / Q000032:analysis / Q000737:chemistry; D015203:Reproducibility of Results; D013638:Tars / Q000737:chemistry*
chemical_list: D006841:Hydrocarbons, Aromatic; D013638:Tars