Abstract
Alternatives to hydrochloric acid for the reduction of Se(VI) to Se(IV) (prereduction) were explored. Prereduction of Se(VI) in 0.1–1 M HCl and 0.1–3 M HBr as a function of NaBr concentration and time of boiling was investigated and conditions for mild prereduction of Se(VI) have been found. Minimum concentrations of sodium tetrahydroborate(III) and HCl for reduction of Se(IV) to Se(- II) in selenium hydride were found and minimum acid concentrations were determined. Prereduction of Se(VI) by the method involving optimum concentrations of 0.48 M HCl plus 1.4 M KBr was verified by comparison with the 5 M HCl reference method for determination of Se(VI) in Niagara River waters.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: 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.