The accurate determination of cobalt

✍ Scribed by A.G. Foster; W.J. Williams

• Publisher: Elsevier Science
• Year: 1960
• Tongue: English
• Weight: 657 KB
• Volume: 22
• Category: Article
• ISSN: 0003-2670
• DOI: 10.1016/s0003-2670(00)88333-6

✦ Synopsis

Determination of +henantlwoline About 4 mg of phcnanthroline in IO ml aqueous solution, containing I ml of 'WI Na-acetate are titrated with a 0.004 M solution of palladmm chloride. The endpoint, at the frrst maximum optical density point, coincides with the quantitative formatlon of Pd2Y3. The test solution may contain some sodium chloride. The analysis can also be carried out at about PH I in nitric acid solution, but the former method is prcferablc. SUMMARY l%tlnum(lV), pnllaclium(lI) and gold(III), 8s chloriclcs, wer0 clctcrmmcd dlrcctly in tlliucy-,Lnatc or clllortclc solutions by hctcromctrlc tltr,rtlon with phcn~nthrollnc at phi values of I -7 L'WO Or CVCn tllrcc nl&lls COUld be dCtcrmlnCd ~IrCClSdy lronl the CrltlLd pJlnt5 Of One Or two lictcromctric tltratlon curve3 Scvcrnl mctliods arc prcscntecl 14usicurs mdtlloclcs sent proposhcs pour Ic dosage du platmc, du palladium ct dc I'or, cn prdscncc 10s uns clcs autrcs On procZxlc par titrafp h8tBrombtrrcluc en utlllsnnt la plidnantl~rolinc commc rdactif. %~JSAIMMENFASSUNG I)urcli hctcromc*trischc 'ritration mit I%cnantl~rolin Iconncn Platin,