| Rapid Estimation of Total Iron in
Chrome-Bearing Materials |
B. C. SINHA AND S. K. RoY
Pages : 31-34
DOI : 10.1080/0371750X.1969.10855677 |
| Abstract |
| A rapid method for direct determination of total iron in chrome-bearing materials
is given. The sample after fusion with sodium peroxide in a nickel crucible is taken into
sulphuric acid solution and chromate is reduced by boiling with ethyl alcohol. Iron is
then titrated with mercurous nitrate in presence of a large excess of thiocyanate ion.
Other ions which are generally present in chrome-bearing materials do not interfere.
Oxides of nitrogen interfere but their effect is eliminated by boiling with urea. A determination
can be completed within 20 minutes after opening the sample. The standard
deviation has been found to be 0.056. |
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