Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
ENVIRONMENTAL SAMPLE CLEANING AND EXTRACTION PROCEDURES BY MICROWAVE-ASSISTED PROCESS (MAP) TECHNOLOGY
Autore:
LAO RC; SHU YY; HOLMES SJ; CHIU C;
Indirizzi:
ENVIRONM CANADA,ENVIRONM TECHNOL CTR,RIVER RD OTTAWA ON K1A 0H3 CANADA
Titolo Testata:
Microchemical journal
fascicolo: 1, volume: 53, anno: 1996,
pagine: 99 - 108
SICI:
0026-265X(1996)53:1<99:ESCAEP>2.0.ZU;2-7
Fonte:
ISI
Lingua:
ENG
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
14
Recensione:
Indirizzi per estratti:
Citazione:
R.C. Lao et al., "ENVIRONMENTAL SAMPLE CLEANING AND EXTRACTION PROCEDURES BY MICROWAVE-ASSISTED PROCESS (MAP) TECHNOLOGY", Microchemical journal, 53(1), 1996, pp. 99-108

Abstract

Extraction is one of the most important sample preparation techniquesin trace organic analysis. Very often for solid particulate samples, the method of choice is either liquid or gas extraction, i.e., extraction in a Soxhlet apparatus or in dynamic headspace. Soxhlet extractionis more popular than headspace analysis. The technique, however, has a number of drawbacks, since it is tedious and restricted in solvent selectivity. Samples are normally extracted at the boiling point of thesolvent for a long period of time and the possibility of thermal decomposition of target compounds cannot be ignored. A further disadvantage of Soxhlet extraction is that a concentration/evaporation step is required, and it can introduce a high degree of contamination into the sample with solvent impurities. These problems, together with the rising cost of solvent and waste disposal restrictions, have led to the search for new techniques for sample extraction. Recent innovative processes, such as supercritical fluid extraction (SFE) and the microwave-assisted process (A IAP) are very promising techniques. SFE has currently been developed and used, but it has technological drawbacks. The MAPtechnique has the potential for many applications in analysis. Comparisons of the results for sample preparations between MAP and conventional Soxhlet procedures are illustrated. (C) 1996 Academic Press, Inc.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 27/11/20 alle ore 06:24:12