Analysis of rocks and minerals by atomic absorption spectroscopy, part 2 : determination of total iron, magnesium, calcium, sodium and potassium

1968 ◽  
Author(s):  
S Abbey
Keyword(s):  
Atomic Absorption ◽  
Absorption Spectroscopy ◽  
Atomic Absorption Spectroscopy ◽  
Total Iron ◽  
Sodium And Potassium

Decomposition of Some Skarn-Rock Samples in Neutral and Basic Molten Potassium Nitrate for the Extraction and Determination of Iron

1996 ◽  
Vol 49 (2) ◽  
pp. 261 ◽  
Author(s):  
JK Mujumba ◽  
BD James ◽  
SA Tariq
Keyword(s):  
Atomic Absorption ◽  
Absorption Spectroscopy ◽  
Atomic Absorption Spectroscopy ◽  
Iron Content ◽  
Potassium Nitrate ◽  
Total Iron ◽  
Total Iron Content ◽  
X Ray ◽  
Rock Samples

Five skarn -rock samples were heated with KNO3 and with a solution of 5% KOH in KNO3 for 2 h at 450°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.

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