Determination and confirmation of methomyl residues in soil and water

Gas chromatographic methods for the determination of methomyl residues in soil and water utilising the flame photometric detector are described. Complete extraction of methomyl residues in soil and water was obtained and the analytica.1 results were reproducible. Recovery of 90–96 % of methomyl residues was possible based on 50 g of soil and 1 litre of water. The identity of methomyl residues determined was confirmed by gas chromatography-mass spectrometry.