The photometric determination of cobalt by extraction with b -nitroso-a-naphthol

✍ Scribed by A. Claassen; A. Daamen

• Publisher: Elsevier Science
• Year: 1955
• Tongue: English
• Weight: 561 KB
• Volume: 12
• Category: Article
• ISSN: 0003-2670
• DOI: 10.1016/s0003-2670(00)87879-4

✦ Synopsis

Nitroso-a-naphthol was introduced in xgrg by BELLWCCI~ as a calorimetric reagent for the estimation of cobalt. YQE r~~~ 13~1tTox~ described a photometric procedure in which the cobalt complex was developed in an ammoniacal citrate solution; this method was subject to intcrfcrcnccs by nickel, copper, manganese and large amounts of iron. That first cstr:\ction proccdurc (by benzene) was described by CARnIsI, JL'P;G ASI) 'I~GI~su.\S~. Recently BAI<O~ published a method especially adapted to the dctcnrmination of tracts of cobalt in fodder and soil. The effect of a large number of elements in 5 mg quantities was invcstisated and his method proved to be hi&ly seIectivc and sensitive.

Rl'fcrrmes pa 553. * only 2.5 mg tcstcd. *+ only fjo lll& testctl.