Summary
It was shown that iron could be determined by atomic absorption by direct aspiration (without preliminary treatment except dilution where necessary) of the filtrates of dry or waterlogged soils extracted with the following reagents:N ammonium acetate pH 7.0,N ammonium acetate pH 3.0, and Morgan's reagent.
References
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Khan, F.R., Cornfield, A.H. The direct determination of iron in soil extracts by atomic absorption spectrophotometry. Plant Soil 29, 189–192 (1968). https://doi.org/10.1007/BF01393922
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DOI: https://doi.org/10.1007/BF01393922