Decay dynamics of fenvalerate in mentha piperita L and in the resulting oil

ABSTRACT

A synthetic pyrethroid, fenvalerate [alpha-cyano-3-phenoxy-benzyl alpha-Isopropyl-4-chlorophenylacetate.] was applied to peppermint plants. The residues were determined in peppermint herb and in the resulting oil at different intervals after spraying. Gas-liquid chromatographic analysis was performed on a 5% OV-101 AW/CW with[63] Ni electron capture detection. Fenvalerate recovery was 90% when added at the 5 ppm level. Tracing the residue data are indicated hereafter