Free Access
Volume 26, Number 7, September 1998
Preparative Chromatography
Page(s) 251 - 255
Section Original articles
Analusis 26, 251-255 (1998)
DOI: 10.1051/analusis:1998169

Rapid and simple method for extraction and determination of imidazolinone herbicides in soil

G. D'Ascenzo, A. Gentili, S. Marchese, A. Marino and D. Perret

Dipartimento di Chimica, Università "La Sapienza" di Roma, Piazzale Aldo Moro n° 5, 00185 Rome, Italy

A rapid, simple and accurate method for the simultaneous determination of residues of the imidazolinone herbicides (imazapyr, imazaquin, imazamethabenz and imazamethabenz-methyl) in soil is described. The basis of the method is the formation of a supernatant by sonication of the soil with 0.1 M KCl. After removal from the soil particles, the pesticides are quantified by reversed-phase liquid chromatography-mass spectrometry with an electrospray interface (LC-ESI-MS). Recoveries from a variety of soil types, fortified over the range of 50-200 ppb, are essentially quantitative for each imidazolinone and the detection limits (signal-to-noise ratio = 3) of the method are always lower than 14 ng/g.

Key words: Residues / imidazolinone herbicides / soil LC/ESI/MS.

© EDP Sciences, Wiley-VCH 1998