UNI 3618 : 1955
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.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 CHEMICAL ANALYSIS OF MINERALS - DETERMINATION OF ARSENIC IN IRON ORE - METHOD FOR REDUCTION WITH STANNOUS CHLORIDE AND TITRATION WITH IODINE
11-07-2019
01-01-1955
Si tratta la soluzione cloridrica del campione con soluzione di cloruro stannoso per ridurre l'arsenico allo stato elementare; l'arsenico separato é dosato volumetricamente con soluzione di iodio, il cui eccesso é titolato con soluzione corrispondente di arsenito sodico. Soluzioni e reattivi. Procedimento. Prova in bianco. Calcolo.
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