Determination of total soluble aluminum in soil solution using pyrocatechol violet, lanthanum and iron to discriminate against micro-particulates and organic ligands

Menzies N.W., Kerven G.L., Bell L.C. and Edwards D.G. (1992) Determination of total soluble aluminum in soil solution using pyrocatechol violet, lanthanum and iron to discriminate against micro-particulates and organic ligands. Communications in Soil Science and Plant Analysis, 23 17-20: 2525-2545. doi:10.1080/00103629209368754


Author Menzies N.W.
Kerven G.L.
Bell L.C.
Edwards D.G.
Title Determination of total soluble aluminum in soil solution using pyrocatechol violet, lanthanum and iron to discriminate against micro-particulates and organic ligands
Journal name Communications in Soil Science and Plant Analysis   Check publisher's open access policy
ISSN 1532-2416
Publication date 1992-11-01
Sub-type Article (original research)
DOI 10.1080/00103629209368754
Volume 23
Issue 17-20
Start page 2525
End page 2545
Total pages 21
Subject 1111 Nutrition and Dietetics
1102 Cardiovascular Medicine and Haematology
1900 Earth and Planetary Sciences
2300 Environmental Science
Abstract The determination of the Al concentration in soil solution is an important diagnostic tool in studies of Al toxicity in acid soils. Where organic residues have been applied as améliorants of Al toxicity, it is necessary to measure both the total soluble and monomeric Al concentrations in order to estimate the degree of Al complexation. Determination by ICPAES provides a measure of total Al without discrimination between chemical forms, and thus may include solid-phase Al present as micro-particulates that have passed through a 0.22 pm filter. Colorimetric methods, which do not include an acidification step, discriminate against micro-particulates, but do not measure all Al present as soluble organic forms and thus underestimate total soluble Al. Acidification of soil solutions to decomplex organically bound Al, and thus permit its measurement by colorimetric methods, results in dissolution of micro-particulates and overestimation of total soluble Al. Filtering to 0.025 pm eliminated microparticulates, thereby removing a source of error. However, this process is time consuming and thus unsuitable for routine use.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Scopus Import - Archived
 
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