A simple and fast flow method for the trace level determination of p-toluidine, 2-methyl-5-nitroaniline, and 2,4-dinitroaniline in aqueous samples is reported. These amino/nitroaromatics are related to trinitrotoluene (TNT) and appear during the degradation process of the explosive. The chemical principles of ion-pair formation and liquid-liquid extraction are applied: In aqueous acidic medium, the protonated analyte [HA] + makes an ion-pair with the tetrachloroaurate(III) ion, followed by on-line ion-pair extraction into the dichloromethane carrier used. After membrane separation, the CH 2 Cl 2 containing the ion-pair, [HA] + M for all the compounds. Although spectral studies indicated the formation and extraction of a very small amount of the ion-pair species, the reversed micellar-mediated CL detection system provides an alternative procedure for the determination of degradation products of the explosive TNT in environmental aqueous samples.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.