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UNI 3892 : 1957

Withdrawn
Withdrawn

A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.

PROCEDURES FOR THE CHEMICAL ANALYSIS OF MINERALS - DETERMINATION OF THE TITANIUM OXIDE CONTENT IN TITANIUM MINERALS - CUPFERRON GRAVIMETRIC METHOD
Withdrawn date

11-07-2019

Published date

01-01-1957

Dopo disgregazione del minerale con perossido di sodio e insolubilizzazione della silice, si separa il ferro con idrogeno solforato in soluzione alcalina contenente acido tartarico, indi si precipita il titanio con cupferron in soluzione acida, si filtra, si calcina e si pesa infine l'ossido di titanio. Se il minerale contiene zirconio o vanadio è necessario purificare l'ossido di titanio. Soluzioni e reattivi. Procedimento. Prova in bianco. Calcolo.

DocumentType
Standard
PublisherName
Ente Nazionale Italiano di Unificazione (UNI)
Status
Withdrawn

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