EFFECT OF EXTRACTION SYSTEMS ON CLOMAZONE RECOVERY FROM AGED SOIL SAMPLES

Citation
Kb. Kirksey et Tc. Mueller, EFFECT OF EXTRACTION SYSTEMS ON CLOMAZONE RECOVERY FROM AGED SOIL SAMPLES, Journal of AOAC International, 78(6), 1995, pp. 1519-1522
Citations number
6
Categorie Soggetti
Chemistry Analytical
ISSN journal
10603271
Volume
78
Issue
6
Year of publication
1995
Pages
1519 - 1522
Database
ISI
SICI code
1060-3271(1995)78:6<1519:EOESOC>2.0.ZU;2-#
Abstract
Seven extraction methods were examined to determine which one provided a simple, efficient clomazone extraction from aged soil. The method s elected involved adding 80 mt acetonitrile to moist soil and shaking f or 16 h. The extract was filtered, and an additional 80 mt acetonitril e was added, equilibrated for 1 h, and filtered. Filtrates were combin ed and concentrated with a rotary evaporator. Clomazone concentrations were then determined by reversed-phase liquid chromatography with UV detection at 220 nm. Recovery with this method was equal to a 16 h + 1 h extraction with methanol, but acetonitrile was selected as extracti on solvent because of its ease of removal with a rotary evaporator. Th e recovery from fortified soil samples was >80%, and a conservative lo wer limit of detection was 40 ng/g soil.