Selectivity of Ammonium Acetate, Hydroxylamine Hydrochloride, and Oxalate/Ascorbic Acid Solutions for the Speciation of Fe, Mn, Zn, Cu, Ni, and Al in Early Tertiary Paleosols
✍ Scribed by John J. McAlister; Bernard J. Smith
- Publisher
- Elsevier Science
- Year
- 1999
- Tongue
- English
- Weight
- 169 KB
- Volume
- 63
- Category
- Article
- ISSN
- 0026-265X
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✦ Synopsis
Samples from early Tertiary subbasaltic and interbasaltic profiles were extracted by using a selective dissolution procedure. The specificity of each extracting solution for the different adsorption components was examined and the most important phases for the dispersion of Fe, Mn, Cu, Zn, Ni, and Al were identified. In order to observe an overall extraction pattern, the percentage of the total concentration extracted by each solution was recorded. The effectiveness of 1 M NH 2 OH ⅐ HCl/CH 3 COOH solution for the dissolution of crystalline iron minerals was also examined by using an XRD technique. These results have particular importance for the use of tracer techniques to study iron mineral formation. Results from element speciation, rather than a total element procedure, provide increased detail of element dispersion and information on the choice of extraction solutions required for a more complete dissolution of these chemically weathered palaeosols.