Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
FLOW-INJECTION ANALYSIS OF CHLOROPHENOXYACID HERBICIDES USING PHOTOCHEMICALLY INDUCED FLUORESCENCE DETECTION
Autore:
GARCIA LF; EREMIN S; AARON JJ;
Indirizzi:
UNIV PARIS 07,INST TOPOL & DYNAM SYST,CNRS,1 RUE GUY BROSSE F-75005 PARIS FRANCE UNIV PARIS 07,INST TOPOL & DYNAM SYST,CNRS F-75005 PARIS FRANCE
Titolo Testata:
Analytical letters
fascicolo: 8, volume: 29, anno: 1996,
pagine: 1447 - 1461
SICI:
0003-2719(1996)29:8<1447:FAOCHU>2.0.ZU;2-6
Fonte:
ISI
Lingua:
ENG
Soggetto:
WATER; IMMUNOASSAYS; PHOTOLYSIS;
Keywords:
CHLOROPHENOXYACID HERBICIDES; FLOW-INJECTION ANALYSIS; PHOTOCHEMICALLY INDUCED FLUORESCENCE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
24
Recensione:
Indirizzi per estratti:
Citazione:
L.F. Garcia et al., "FLOW-INJECTION ANALYSIS OF CHLOROPHENOXYACID HERBICIDES USING PHOTOCHEMICALLY INDUCED FLUORESCENCE DETECTION", Analytical letters, 29(8), 1996, pp. 1447-1461

Abstract

A flow-injection analysis (FIA) method for the determination of chlorophenoxyacid herbicides, based on photochemically induced fluorescence(PIF) detection, is described, PTFE tubing was helically coiled around a low-pressure mercury lamp located between the injection valve and the detector. Two analytical procedures are used, either continuous orstopped-flow mode, according to the photochemical behaviour of the analyte. Ultraviolet (UV) photolysis in a 50% (v/v) MeOH/pH 5 buffer solution provoked a more or less marked increase of the fluorescence signal depending of the herbicide structure. In the stopped-flew mode, UV irradiation times ranged between 90 sec and 12 min. Linear dynamic graphs were established over a concentration range of nearly two orders of magnitude. The FIA-PIF limits of detection ranged from 23 to 98 ng/ml, according to the compound. Relative standard deviations were between 0.7 and 2.7%. The proposed method has been applied to determine those herbicides in spiked river water samples, with mean recoveries ranging from 96 to 108%. It shows the usefulness of this technique for chlorophenoxyacid herbicides analysis.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 27/11/20 alle ore 16:01:47