Detection by 1H-NMR Spectroscopy of Chloroquine in Urine from Acutely Poisoned Patient

Abstract
High-resolution NMR spectroscopy is increasingly being used to analyze a variety of physiological fluids (1)(2) and may constitute a new tool in clinical diagnosis. Many important low-molecular-mass metabolites can be readily detected and quantified by 1H-NMR. New sequences, such as 1H–1H J-resolved map, have proved very useful (3). We have used these methods to investigate a urine sample obtained in a case of acute chloroquine poisoning.