An analytical method is described for determination of ng g(-1) levels of aryloxyphenoxypropionic herbicides in soil, which combines a simple technique for sample preparation and Liquid chromatography/electrospray ionization mass spectrometry with negative ion mode of operation. This method involves a simple treatment of the sample via isolation and trace enrichment by soil column extraction (SCE) and clean-up with a Carbograph-1 cartridge. The effects of various extractant solutions and soil type, test of extractability for aged field-treated soil and pesticide concentration on the performance of the SCE are investigated. Overall, the recoveries for each herbicide across all fortified samples (1-50 ng g(-1)) were 89+/-3.5% for fluazifop, 90+/-3.3% for haloxyfop and 89+/-3.1% for diclofop. To achieve good liquid chromatographic separation, acidification of the eluent and subsequent postcolumn addition of a neutralization buffer are needed to avoid ion signal suppression. The detection limits (S/N=3) obtained using the time-scheduled selected ion monitoring varied from 0.1 to 0.3 ng g(-1)

Soil column extraction followed by Liquid Chromatography Electrospray Ionization Mass Spectrometry for the efficient determination of aryloxyphenoxypropionic herbicides in soil samples at ppb levels / Lagana', Aldo; Fago, Giovanna; Marino, Aldo; M., Mosso. - In: ANALYTICA CHIMICA ACTA. - ISSN 0003-2670. - STAMPA. - 375:1-2(1998), pp. 107-116. [10.1016/S0003-2670(98)00461-9]

Soil column extraction followed by Liquid Chromatography Electrospray Ionization Mass Spectrometry for the efficient determination of aryloxyphenoxypropionic herbicides in soil samples at ppb levels

LAGANA', Aldo;FAGO, Giovanna;MARINO, Aldo;
1998

Abstract

An analytical method is described for determination of ng g(-1) levels of aryloxyphenoxypropionic herbicides in soil, which combines a simple technique for sample preparation and Liquid chromatography/electrospray ionization mass spectrometry with negative ion mode of operation. This method involves a simple treatment of the sample via isolation and trace enrichment by soil column extraction (SCE) and clean-up with a Carbograph-1 cartridge. The effects of various extractant solutions and soil type, test of extractability for aged field-treated soil and pesticide concentration on the performance of the SCE are investigated. Overall, the recoveries for each herbicide across all fortified samples (1-50 ng g(-1)) were 89+/-3.5% for fluazifop, 90+/-3.3% for haloxyfop and 89+/-3.1% for diclofop. To achieve good liquid chromatographic separation, acidification of the eluent and subsequent postcolumn addition of a neutralization buffer are needed to avoid ion signal suppression. The detection limits (S/N=3) obtained using the time-scheduled selected ion monitoring varied from 0.1 to 0.3 ng g(-1)
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11573/247204
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