TITLE

Determination of pyrimethanil and kresoxim-methyl in soils by headspace solid-phase microextraction and gas chromatography-mass spectrometry

AUTHOR(S)
Navalón, Alberto; Prieto, Avismelsi; Araujo, Lilia; Vilchez, José Luis
PUB. DATE
August 2004
SOURCE
Analytical & Bioanalytical Chemistry;Aug2004, Vol. 379 Issue 7/8, p1100
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
A method using headspace solid-phase microextraction (HS-SPME) then gas chromatography-mass spectrometry with selected ion monitoring (GC-MS, SIM) has been developed for determination of trace amounts of the fungicides pyrimethanil and kresoxim-methyl in soil and humic materials. Both fungicides were extracted on to a fused-silica fibre coated with 85 µm polyacrylate (PA). Response-surface methodology was used to optimise the experimental conditions. For soil samples the linear dynamic range of application was O.004-1.000 µg g-1 for pyrimethanil and 0.013-1.000 µg g-1 for kresoxim-methyl. The detection limits were 0.001 µg g-1 and 0.004 µg g-1 for pyrimethanil and kresoxim-methyl, respectively. HP-SPME-GC-MS analysis was highly reproducible--relative standard deviations (RSD) were between 6.7 and 12.2%. The method was validated by analysis of spiked matrix samples and used to investigate the presence of pyrimethanil and kresoxim-methyl above the detection limits in soil and humic materials.
ACCESSION #
14281864

 

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