The application of strongly reducing agents in flow injection analysis : Part 3. Vanadium(II)

✍ Scribed by R.C. Schothorst; J.J.F. van Veen; G. den Boef

• Publisher: Elsevier Science
• Year: 1984
• Tongue: English
• Weight: 578 KB
• Volume: 161
• Category: Article
• ISSN: 0003-2670
• DOI: 10.1016/s0003-2670(00)85774-8

✦ Synopsis

The application of vanadium(I1) as a powerful reducing reagent in flow injection analysis is described. Results are presented for the determination of various organic and inorganic substances. With spectrophotometric detection, based on the absorption by vanadium(II)-EDTA at 350 nm, limits of determination were about 5 x 10m5 mol 1-l. Nitrate, nitrite and hydroxylamine were measured with amperometric detection. The limit of determination was about the same as with spectrophotometric detection. In a slightly acidic medium, hydrazine could be determined with the amperometric detector, with a limit of determination of about lo4 mol l-'. By coupling an ammonia detection device to the reduction system, the percentage conversions of nitrate, nitrite and hydroxylamine to ammonia were shown to be 26%, 54% and 47%, respectively.