Proton Magnetic Resonance Spectroscopic Assay of Propoxur

Abstract

A procedure is described for the assay of propoxur (o-isopropoxyphenyl N-methylcarbamate) by nuclear magnetic resonance (NMR) spectroscopy. Methanol was used as internal standard and chloroform as solvent. Known standard and technical materials were analyzed and results of NMR and liquid chromatographic methods were compared. The NMR method is straightforward, with a precision of ± 1.6% (95% confidence limits) for 2 sample weighings.