The preparation, detection and separation of some valency states of vanadium and cobalt by paper chromatography

✍ Scribed by H.M. Stevens

• Book ID: 102979509
• Publisher: Elsevier Science
• Year: 1956
• Tongue: English
• Weight: 719 KB
• Volume: 15
• Category: Article
• ISSN: 0003-2670
• DOI: 10.1016/0003-2670(56)80010-x

✦ Synopsis

Vanadium

Prqbavatio~t of vanadimt solutions

Vv chloride solution was prepared by acidifying a solution of ammonium vanadatc with 2N HCl, and a VV sulphatc solution by dissolvrng 4-5 g of vanadium pentoxidc in a mixture of sulphurrc acid (20 ml) and water (to ml) by heating. The sulphatc solution was cooled and diluted to 400-500 ml with distilled water, and filtcrcd (Whatman No. 41 paper). Vlv chloride (VOCl,) solution was prcparcd by heating vanadium pcntoxide with hydrochloric acid (d = I .x8) until the concentrated solution ccascd to give a Vv spot when analysed by paperstrip chromatography (see below). A Vfy sulphatc solution was prepared by dissolving 4 g of vanadyl sulphatc (VOSOd.2H,0) in 500 ml of water and adding 2 ml sulphuric acid (d = r.84), or by electrolytic reduction of Vv sulphate solution using Pt elcctrodcs and a current of G-7 A in a ccl1 with a porous anode chamber as described by WARDLAW AND SYLVIBTIZR~. References 9. 57 G. NICKU~SS asD 2%. J. &StSrI<R, ibid., In the press.