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Determination of Inorganic Mononuclear Aluminum by Selected Chelation Using Crown Ethers
Author(s) -
Evans Andrew,
Zelazny Lucian W.
Publication year - 1986
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1986.03615995005000040016x
Subject(s) - chelation , citric acid , chemistry , crown ether , oxalic acid , nuclear chemistry , ether , crown (dentistry) , inorganic chemistry , ion , organic chemistry , materials science , composite material
This study was conducted to determine whether cation‐selective crown ethers could be utilized to measure inorganic mononuclear Al 3+ in solutions containing Al‐complexing ligands. The dibenzo‐18‐crown‐6 ether was found to selectively chelate inorganic mononuclear Al 3+ in the presence of common soil cations (Na, K, Ca, Mg, Fe, and Si). Aluminum previously complexed with di‐NaEDTA, oxalic, and citric acid was not chelated by the crown ether. The presence of high concentrations of F ‐ , SO 2‐ 4 , and NO ‐ 3 in the sample solutions did not influence the determination of inorganic mononuclear Al 3+ . Determination of inorganic mononuclear Al 3+ was reproducible to within ±0.17 × 10 −6 mol L −1 in the 0.8 to 10 × 10 −6 mol Al L −1 concentration range.