Determination of chlorinated phenoxy acid and ester herbicides in soil and water by liquid chromatography particle beam mass spectrometry and ultraviolet absorption spectrophotometry

Eight chlorinated phenoxy acid and three ester herbicides are determined in soil and water by liquid chromatography with UV adsorption of quantitation and particle beam mass spectrometry for confirmation. Chromatography with UV detection (230 nm) gives quantitation limits of 12-80 ng in 10-μl injected volume (corresponding to 4.8-32 ppb in 125 mL of water and 20-133 ppb in 30 g of soil and 500 μL of final extract volume)