Determination of the insecticide imidacloprid in water and soil using high-performance liquid chromatography.
J Chromatogr A
; 787(1-2): 271-5, 1997 Nov 07.
Article
em En
| MEDLINE
| ID: mdl-9409002
ABSTRACT
We describe an analytical technique for measuring residues of imidacloprid, a relatively new and highly active insecticide, in water and soil using high-performance liquid chromatography (HPLC). All analyses were performed on reversed-phase HPLC with UV detection at 270 nm using a mobile phase of acetonitrile-water (2080, v/v). Fortified water samples were extracted with either solid-phase extraction (SPE) or liquid-liquid extraction methods. A detection limit of 0.5 microgram/l was achieved using the SPE method. The imidacloprid residues in soils were extracted with acetonitrile-water (8020, v/v), and the extract was then evaporated using a rotary evaporator. The concentrated extract was redissolved in 1 ml of acetonitrile-water (2080, v/v) prior to analysis by reversed-phase HPLC. A detection limit of 5 micrograms/kg was obtained by this method which is suitable for analysis of environmental samples. Accuracy and precision at 10 and 25 micrograms/kg soil samples were 85 +/- 6% and 82 +/- 4%, respectively.
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Base de dados:
MEDLINE
Assunto principal:
Poluentes do Solo
/
Poluentes Químicos da Água
/
Resíduos de Praguicidas
/
Hidrocarbonetos Clorados
/
Imidazóis
/
Inseticidas
Idioma:
En
Ano de publicação:
1997
Tipo de documento:
Article