Titanium complexes cupferron

Determination of uranium with cupferron Discussion. Cupferron does not react with uranium(VI), but uranium(IV) is quantitatively precipitated. These facts are utilised in the separation of iron, vanadium, titanium, and zirconium from uranium(VI). After precipitation of these elements in acid solution with cupferron, the uranium in the filtrate is reduced to uranium(IV) by means of a Jones reductor and then precipitated with cupferron (thus separating it from aluminium, chromium, manganese, zinc, and phosphate). Ignition of the uranium(IV) cupferron complex affords U308. 

Titanium salts can also be determined using cupferron (the ammonium salt of nitrosophenylhydroxylamine) [20] or tannin [21]. In addition, 2 -hydroxy-4 -methylpropiophenone oxime has been shown to form an insoluble 1 1 complex with Ti salts [22]. 

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