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Titolo:
Quantitative determination of straight and cyclic hydrocarbons in crystallized permethylated-beta-cyclodextrin inclusion complexes by static headspace-gas chromatography
Autore:
Cardinael, P; Peulon-Agasse, V; Coquerel, G; Combret, Y; Combret, JC;
Indirizzi:
Univ Rouen, UFR Sci, IRCOF, EA 2659, F-76821 Mt St Aignan, France Univ Rouen Mt St Aignan France F-76821 659, F-76821 Mt St Aignan, France
Titolo Testata:
JOURNAL OF SEPARATION SCIENCE
fascicolo: 2, volume: 24, anno: 2001,
pagine: 109 - 115
SICI:
1615-9314(200102)24:2<109:QDOSAC>2.0.ZU;2-0
Fonte:
ISI
Lingua:
ENG
Soggetto:
AUTOMATIC EQUILIBRIUM HEADSPACE; STABILITY-CONSTANTS; PARTITION-COEFFICIENTS; THERMODYNAMICS; DERIVATIVES; DEHYDRATION;
Keywords:
static headspace-gas chromatography; multiple headspace extraction; inclusion complex; heptakis (2,3,6-tri-O-methyl)-beta-cyclodextrin; full evaporation technique;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
24
Recensione:
Indirizzi per estratti:
Indirizzo: Peulon-Agasse, V Univ Rouen, UFR Sci, IRCOF, EA 2659, F-76821 Mt St Aignan, France Univ Rouen Mt St Aignan France F-76821 t Aignan, France
Citazione:
P. Cardinael et al., "Quantitative determination of straight and cyclic hydrocarbons in crystallized permethylated-beta-cyclodextrin inclusion complexes by static headspace-gas chromatography", J SEP SCI, 24(2), 2001, pp. 109-115

Abstract

Static headspace-gas chromatography (HS-GC) method is used for determination of the stoichiometry of crystalline inclusion complexes of heptakis (2,3,6-tri-Omethyl)-beta -cyclodextrin (TRIMEB) with methylcyclohexane, pentane, cyclohexane, hexane, (-)alpha -pinene, and (+/-)-alpha -pinene. The 'FullEvaporation Technique' (FET) with Multiple Headspace Extraction (MHE) measurements is realized in a straightforward manner on the solid material; this appears to be the most convenient method for quantitative determination of the guest/host ratio. As an interesting alternative, the 'solution approach' (sample dissolved in the solvent) is also performed by a single extraction with ethanol as solvent, which is sufficiently polar to dissociate these complexes. TRIMEB forms stable 1:1 complexes with cycloalkanes or cycloalkenes at room temperature and normal pressure. In contrast, the stoichiometry with n-alkane is different from ratio of 1:1 because this solid shows efflorescent behavior under the same conditions.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 09/04/20 alle ore 07:47:45