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Titolo:
NOVEL PRECONCENTRATION TECHNIQUE FOR ONLINE COUPLING TO HIGH-SPEED NARROW-BORE CAPILLARY GAS-CHROMATOGRAPHY - SAMPLE ENRICHMENT BY EQUILIBRIUM (AB)SORPTION - II - COUPLING TO A PORTABLE MICRO GAS-CHROMATOGRAPH
Autore:
TUAN HP; JANSSEN HG; CRAMERS CA; MUSSCHE P; LIPS J; WILSON N; HANDLEY A;
Indirizzi:
EINDHOVEN UNIV TECHNOL,INSTRUMENTAL ANAL LAB,POB 513 NL-5600 MB EINDHOVEN NETHERLANDS CHROMPACK INT NL-4300 EA MIDDELBURG NETHERLANDS ICI PLC,RES & TECHNOL CTR,WILTON CTR MIDDLESBROUGH TS90 8JE CLEVELANDENGLAND ICI TECHNOL,SCI SUPPORT GRP RUNCORN WA7 4QD CHESHIRE ENGLAND
Titolo Testata:
Journal of chromatography
fascicolo: 1-2, volume: 791, anno: 1997,
pagine: 187 - 195
Fonte:
ISI
Lingua:
ENG
Keywords:
EQUILIBRIUM ABSORPTION; TRACE ANALYSIS; SAMPLE ENRICHMENT; PRECONCENTRATION; ALKANES;
Tipo documento:
Article
Natura:
Periodico
Citazioni:
2
Recensione:
Indirizzi per estratti:
Citazione:
H.P. Tuan et al., "NOVEL PRECONCENTRATION TECHNIQUE FOR ONLINE COUPLING TO HIGH-SPEED NARROW-BORE CAPILLARY GAS-CHROMATOGRAPHY - SAMPLE ENRICHMENT BY EQUILIBRIUM (AB)SORPTION - II - COUPLING TO A PORTABLE MICRO GAS-CHROMATOGRAPH", Journal of chromatography, 791(1-2), 1997, pp. 187-195

Abstract

The technique of equilibrium (ab)sorption has been proven to be a powerful method for preconcentration of gaseous samples for high-speed narrow-bore capillary gas chromatography (GC) in general and field-portable GC instruments, often referred as micro GCs, in particular. Using a simple experimental set-up equipped with an open-tubular enrichment column it is possible to produce a homogeneously enriched sample plug,allowing reproducible injections of an enriched sample into the microGC. Using a non-polar trapping column enrichment factors found for n-alkanes in the range of C-7 to C-10 ranged from 15 to 150 and agree well with calculated values. Using a highly retentive Thermocap column, the enrichment factor observed for heptane was above 500. As the use of this new preconcentration method requires only minimum modification of the micro GC, the chromatographic performance of the instrument wasnot compromised by direct coupling to the preconcentration device. Examples of on-line enrichment with portable micro GC analysis of VOCs from air are shown. These examples clearly demonstrate the potentials of the new method in field analysis. (C) 1997 Elsevier Science B.V.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 16/07/20 alle ore 16:36:28