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Titolo:
Identification of the oxidation products of the reaction between alpha-pinene and hydroxyl radicals by gas and high-performance liquid chromatographywith mass spectrometric detection
Autore:
Van den Bergh, V; Vanhees, I; De Boer, R; Compernolle, F; Vinckier, C;
Indirizzi:
Catholic Univ Louvain, Dept Chem, B-3001 Heverlee, Belgium Catholic Univ Louvain Heverlee Belgium B-3001 , B-3001 Heverlee, Belgium
Titolo Testata:
JOURNAL OF CHROMATOGRAPHY A
fascicolo: 1-2, volume: 896, anno: 2000,
pagine: 135 - 148
SICI:
0021-9673(20001027)896:1-2<135:IOTOPO>2.0.ZU;2-L
Fonte:
ISI
Lingua:
ENG
Soggetto:
CARBONYL-COMPOUNDS; CHEMICAL-IONIZATION; ATMOSPHERIC OXIDATION; PHASE REACTIONS; OH RADICALS; BETA-PINENE; AIR; CARTRIDGES; EMISSIONS; 2,4-DINITROPHENYLHYDRAZINE;
Keywords:
hydroxyl radicals; air analysis; pinenes; dinitrophenylhydrazones;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Physical, Chemical & Earth Sciences
Citazioni:
36
Recensione:
Indirizzi per estratti:
Indirizzo: Van den Bergh, V Catholic Univ Louvain, Dept Chem, Celestijnenlaan 200F, B-3001 Heverlee, Belgium Catholic Univ Louvain Celestijnenlaan 200F Heverlee Belgium B-3001
Citazione:
V. Van den Bergh et al., "Identification of the oxidation products of the reaction between alpha-pinene and hydroxyl radicals by gas and high-performance liquid chromatographywith mass spectrometric detection", J CHROMAT A, 896(1-2), 2000, pp. 135-148

Abstract

In this paper an identification method is described for determining the degradation products of the reaction of or-pinene with hydroxyl radicals. Thestudy is carried out in a fast-flow reactor equipped with a specially designed microwave cavity (type Surfatron) allowing to operate at pressures up to 100 Ton (1 Torr = 133.322 Pa). The semivolatile products are collected on a liquid nitrogen trap (LN2 trap) and the batch samples are subsequently analysed by GC-MS and HPLC-MS. Some samples were also collected directly ona LpDNPH-cartridge, followed by HPLC-MS analysis. When experiments were carried out at 50 Ton both GC-MS and HPLC-MS measurements showed that campholenealdehyde and pinonaldehyde were identified as condensable oxidation products for the alpha -pinene/OH reaction, with pinonaldehyde being the main product. Furthermore, the LN2 trap collection method based on the in situ conversion of aldehydes and ketones to their 2,4-dinitrophenylhydrazone derivatives allowed the determination of formaldehyde, acetaldehyde and acetone. Although formaldehyde and acetone are present in small amounts in blank samples, it could be established that formaldehyde and acetone are also formed in the alpha -pinene/OH reaction. (C) 2000 Elsevier Science B.V. All rights reserved.

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Documento generato il 19/06/18 alle ore 00:53:48