In situ propylation of ionic organotin and organolead species in water samples - Extraction and determination of the resulting tetraorganometallic compounds by gas chromatography-atomic absorption spectrometry

An analytical method for the simultaneous in situ derivatization of organot in and organolead compounds in water samples is described. Propylated deriv atives of the analytes formed directly in the aqueous medium by reaction wi th tetrapropylborate ions are extracted by hexane/pentane. The organic laye r is dried and purified with sodium sulfate, concentrated by evaporation of the solvent, and injected into a coupled gas chromatography-atomic absorpt ion spectrometry system. The organotin and organolead compounds are determi ned sequentially. The optimum parameters for the derivatization and extract ion procedures of in situ butylation of organolead compounds developed earl ier could be successfully applied to the in situ propylation.