Aluminium determination in soil solution, 2. Short-term colorimetric procedures for the measurement of inorganic monomeric aluminium in the presence of organic acid ligands
1989
Kerven, G.L. | Edwards, D.G. | Asher, C.J. (Queensland Univ., St Lucia (Australia). Dept. of Agriculture) | Hallman, P.S. | Kokot, S. (Queensland Univ. of Technology, Brisbane (Australia). Dept. of Chemistry)
Colorimetric procedures were developed for the determination of inorganic monomeric aluminium (Al) in the presence of organic ligands including high molecular weight fulvic acids and short chain carboxylic acids. The determination of Al in soil solution and its fractionation into inorganic monomeric and organically complexed forms required the measurement of total Al in filtered soil solutions by inductively coupled plasma atomic emission spectroscopy (ICPAES) and the use of one of the short reaction time colorimetric procedures. Limited testing on soil solutions from acid, Al toxic soils showed better agreement between inorganic monomeric Al concentration determined by the new procedures and relative yield data than that obtained by existing colorimetric methods.
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