
%0 Journal Article
%A Mujumba, JK 
%A James, BD 
%A Tariq, SA 
%T Decomposition of Some Skarn-Rock Samples in Neutral and Basic Molten Potassium Nitrate for the Extraction and Determination of Iron
%J Australian Journal of Chemistry
%D 1996/02/01
%V 49
%N 2
%P 261-262
%K 
%R https://doi.org/10.1071/CH9960261
%U https://www.publish.csiro.au/paper/CH9960261 
%X Five skarn -rock samples were heated with KNO3 and with a solution of 5% KOH in KNO3 for 2 h at 450&#176;C. The decomposed samples were cooled, dissolved in water and filtered. Iron was extracted from each residue as well as from the original samples by hot conc. HCl , and determined by atomic absorption spectroscopy. These results were compared with the known (X-ray fluorescence) total iron content of the original samples. The amount of iron extracted with HCl from the skarn samples was 3-11% lower, while that extracted after heating with KNO3 alone was 2-4% lower, than the amount present according to the X-ray fluorescence results. However, the amount of iron extracted from the samples treated with a solution of KOH in KNO3 was comparable to that determined by X-ray fluorescence. 
