title: Solvent extraction-spectrophotometric determination of rare earths with chlorophosphonazo-III.
abstract: The rare-earth chlorophosphonazo III chelates are easily extracted from an aqueous solution (pH 1.1-1.5) into n-butanol. The absorbance at the absorption maximum (at 668 nm) is about 3 times that in aqueous solution. The spectrophotometric determination of rare earths has been investigated.
authors.affiliation: College of General Education Kyushu University Fukuoka, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Taketatsu
authors.forename: M
authors.initials: M
authors.lastname: Kaneko
authors.forename: N
authors.initials: N
authors.lastname: Kono