Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Benefits of a binary modifier with balanced polarity for an efficient supercritical fluid extraction of PAHs from solid samples, followed by HPLC
Autore:
Goncalves, C; Pinto, MD; Alpendurada, MF;
Indirizzi:
Univ Oporto, Fac Pharm, Hydrol Lab, P-4050047 Oporto, Portugal Univ Oporto Oporto Portugal P-4050047 ol Lab, P-4050047 Oporto, Portugal IAREN Water Inst No Reg, P-4050047 Oporto, Portugal IAREN Water Inst No Reg Oporto Portugal P-4050047 50047 Oporto, Portugal
Titolo Testata:
JOURNAL OF LIQUID CHROMATOGRAPHY & RELATED TECHNOLOGIES
fascicolo: 19, volume: 24, anno: 2001,
pagine: 2943 - 2959
SICI:
1082-6076(2001)24:19<2943:BOABMW>2.0.ZU;2-J
Fonte:
ISI
Lingua:
ENG
Soggetto:
POLYCYCLIC AROMATIC-HYDROCARBONS; EXPERIMENTAL-DESIGN APPROACH; POLYCHLORINATED-BIPHENYLS; ENVIRONMENTAL-SAMPLES; CONTAMINATED SOILS; LIQUID EXTRACTION; OPTIMIZATION; TEMPERATURE; PARAMETERS; SOXHLET;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Physical, Chemical & Earth Sciences
Citazioni:
30
Recensione:
Indirizzi per estratti:
Indirizzo: Alpendurada, MF Univ Oporto, Fac Pharm, Hydrol Lab, Rua Anibal Cunha 164, P-4050047 Oporto, Portugal Univ Oporto Rua Anibal Cunha 164 Oporto Portugal P-4050047
Citazione:
C. Goncalves et al., "Benefits of a binary modifier with balanced polarity for an efficient supercritical fluid extraction of PAHs from solid samples, followed by HPLC", J LIQ CHR R, 24(19), 2001, pp. 2943-2959

Abstract

Polycyclic aromatic hydrocarbons (PAHs) are widely distributed environmental contaminants. Their presence in soils indicates a possible contaminationof ground water used for human purposes. Only with a rapid and efficient method could they be analysed in a routine setting. Although there are a great number of publications on this subject, there are many differences between their ideal SFE conditions and related extraction recoveries. With improvements on the extraction capacity of the supercritical fluid such as higher pressure, higher temperature and a stronger modifier effect, the developed method intends to be more robust and applicable to a larger range of matrices. The optimal conditions consist on a 15 minutes extraction at 45 MPa pressure and 95 degreesC. The supercritical fluid is a ternary mixture of CO2 modified with methanol/dichloromethane 5:1. The separation and quantitation was performed by HPLC coupled with a diode array detector in series with a fluorescence detector, which combines high sensitivity with the possibility to confirm the components' identity in a complex chromatogram. Three of the six studied PAHs show recoveries above 90% and the others, those of higher molecular weight, around 70-90%. This modified SFE procedure was applied to three environmental samples andfulfils the requirements of rapidity, high extraction efficiency, and simple performance.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/07/20 alle ore 14:10:19