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Titolo:
IMPROVEMENTS IN ENVIRONMENTAL TRACE ANALYSIS BY GC-IR AND LC-IR
Autore:
VISSER T; VREDENBREGT MJ; DEJONG APJM; SOMSEN GW; HANKEMEIER T; VELTHORST NH; GOOIJER C; BRINKMAN UAT;
Indirizzi:
NATL INST PUBL HLTH & ENVIRONM,LOC,POB 1 NL-3720 BA BILTHOVEN NETHERLANDS FREE UNIV AMSTERDAM,DEPT GEN & ANALYT CHEM NL-1081 HV AMSTERDAM NETHERLANDS
Titolo Testata:
Journal of molecular structure
, volume: 408, anno: 1997,
pagine: 97 - 103
SICI:
0022-2860(1997)408:<97:IIETAB>2.0.ZU;2-D
Fonte:
ISI
Lingua:
ENG
Soggetto:
TRANSFORM INFRARED SPECTROMETRY; BORE LIQUID-CHROMATOGRAPHY; GAS-CHROMATOGRAPHY; IDENTIFICATION;
Keywords:
INFRARED SPECTROMETRY; GC-IR; LC-IR; TRACE ANALYSIS; ENVIRONMENTAL ANALYSIS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
11
Recensione:
Indirizzi per estratti:
Citazione:
T. Visser et al., "IMPROVEMENTS IN ENVIRONMENTAL TRACE ANALYSIS BY GC-IR AND LC-IR", Journal of molecular structure, 408, 1997, pp. 97-103

Abstract

Research has been carried out to enlarge the potential of infrared (IR) spectrometry as a detector in gas and liquid chromatography (GC andLC). The study has been directed to applications in environmental analysis. Examples of recently obtained results are presented. The analyte detectability of GC-IR has been improved by incorporation of an on-column interface for the introduction of large sample volumes. The feasibility of the technique is demonstrated by the identification of pesticides in water at a level of 0.5 mu g l(-1) using on-line desorption of pre-sampled solid-phase extracted cartridges. The detectability of LC-IR, based on solvent elimination interfacing, has been enhanced by on-line trace enrichment. The applicability has been extended to buffered aqueous mobile phases by on-line post-column liquid-liquid extraction into a volatile solvent, and to gradient separations by reduction of the analytical flow using capillary LC combined with post-column addition of a make-up liquid. With both techniques, herbicides have beenidentified in water samples in the low mu g l(-1) range. (C) 1997 Elsevier Science B.V.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/12/20 alle ore 00:51:20