Abstract
Manganese II is oxidised to permanganic acid by treatment with a slight excess of ammonium hexanitratocerate(IV) in a 0.5–2 M nitric acid medium at room temperature. The reaction is markedly catalysed by silver nitrate, so that quantitative oxidation is possible within l min. Conditions have been developed for utilising the catalysed reaction for the colorimetric determination of manganese over the range 0.33–19.93 mg/litre. The new method has the advantage over those currently available in that the oxidation to manganese VII is stoichiometric at room temperature. Under the conditions prescribed the permanganic acid formed is stable for at least 24 hr. Interference from sulphate and from chloride, bromide and iodide can be eliminated by treating the test solution with barium nitrate or silver nitrate, respectively, before the oxidation with cerium IV. Application of the method to the determination of manganese in steel is considered.
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.
