Abstract
A method for detecting residues of the fungicide propiconazole in the petroleum ether extract (concrete) of Boronia megastigma Nees was developed. Gas chromatography/mass spectrometry (GC/MS) using low-resolution selected ion monitoring (LR SIM) had a 1 ppm detection limit in samples that had some preliminary cleanup. The use of GC/MS with high-resolution selected ion monitoring (HR SIM) had a minimum detection limit of 50 ppb for crude spiked samples of boronia concrete. This method was utilized to provide an automated assay for propiconazole residues in the concrete from boronia flowers and in extracts of vegetative material. © 1995 American Chemical Society.
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