Abstract
A highly sensitive method for determination of rhodium by laser thermal lens spectrometry based on the colour reaction between rhodium and the new chromogenic reagent 5-bromo-(2-thiazolylazo)-5-diethylaminobenzoic acid (5-Br-TADEB) has been developed. The experimental results show that in a acetic acid-sodium acetate buffer solution of pH 4.0–5.7 and in the presence of acetone, rhodium reacts with 5-Br-TADEB to form a 1 : 2 stable blue complex exhibiting an absorption maximum at 632 nm which is well-matched to the wavelength of the laser beam used (λ = 632.8 nm). The detection limit and linear range of rhodium(III) are 0.004 μg mL−1 and 0.01–0.08 μg mL−1, respectively. The method has also been applied to determine rhodium in catalyst samples with satisfactory results.
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.
