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Titolo:
Regional water-quality analysis of 2,4-D and dicamba in river water using gas chromatography isotope dilution mass spectrometry
Autore:
Thurman, EM; Zimmerman, LR; Aga, DS; Gilliom, RJ;
Indirizzi:
US Geol Survey, Lawrence, KS 66049 USA US Geol Survey Lawrence KS USA 66049 Geol Survey, Lawrence, KS 66049 USA Univ Nebraska, Dept Chem, Kearney, NE 68849 USA Univ Nebraska Kearney NE USA 68849 aska, Dept Chem, Kearney, NE 68849 USA US Geol Survey, Sacramento, CA 95825 USA US Geol Survey Sacramento CA USA95825 l Survey, Sacramento, CA 95825 USA
Titolo Testata:
INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
fascicolo: 3, volume: 79, anno: 2001,
pagine: 185 - 198
SICI:
0306-7319(2001)79:3<185:RWAO2A>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Soggetto:
SOLID-PHASE EXTRACTION; ENZYME-IMMUNOASSAY; ACIDIC HERBICIDES; LIQUID-CHROMATOGRAPHY; ATRAZINE; SOIL;
Keywords:
GC-MS analysis; ELISA analysis; 2,4-D; dicamba; herbicide;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
18
Recensione:
Indirizzi per estratti:
Indirizzo: Thurman, EM US Geol Survey, 4821 Quail Crest Pl, Lawrence, KS 66049 USA USGeol Survey 4821 Quail Crest Pl Lawrence KS USA 66049 9 USA
Citazione:
E.M. Thurman et al., "Regional water-quality analysis of 2,4-D and dicamba in river water using gas chromatography isotope dilution mass spectrometry", INT J ENV A, 79(3), 2001, pp. 185-198

Abstract

Gas chromatography with isotope dilution mass spectrometry (GC-MS) and enzyme-linked immunosorbent assay (ELISA) were used in regional National WaterQuality Assessment studies of the herbicides, 2,4-D and dicamba, in river water across the United States. The GC-MS method involved solid-phase extraction, derivatized with deuterated 2,4-D, and analysis by selected ion monitoring. The ELISA method was applied after preconcentration with solid-phase extraction. The ELISA method was unreliable because of interference from humic substances that were also isolated by solid-phase extraction. Therefore, GC-MS was used to analyzed 80 samples from river water from 14 basins. The frequency of detection of dicamba (28%) was higher than that for 2,4-D (16%). Concentrations were higher for dicamba than for 2,4-D, ranging from less than the detection limit (<0.05 <mu>g/L) to 3.77 mug/L, in spite of 5 times more annual use of 2,4-D as compared to dicamba. These results suggest that 2,4-D degrades more rapidly in the environment than dicamba.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 09/07/20 alle ore 18:12:33