Abstract
A flow injection configuration is proposed for the determination of TlI and TlIII individually and for mixtures of both analytes. The method allows speciation and fluorimetric detection of thallium in flowing solutions. Thallium(I) is determined by measuring its fluorescence in an HCl medium (λex= 227 nm; λem= 419 nm). The determination of TlIII is based on the rapid reduction of this ion by thiourea with the concomitant formation of fluorescent TlI. The inclusion of a selection valve in the manifold configuration allows the successive determination of the two ions. Linear calibration graphs were obtained between 5.0 × 10–8 and 1.0 × 10–5 mol l–1 of TlI and between 1.0 × 10–7 and 1.0 × 10–5 mol l–1 of TlIII. The applicability of the method was demonstrated by investigating the effect of potential interferents and by the analysis of synthetic samples. The method was successfully applied to the determination of thallium in soils and zinc ores.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
