Solvent extraction-spectrophotometric determination of rare earths with chlorophosphonazo-III.
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.
Taketatsu
T
T
College of General Education Kyushu University Fukuoka, Japan.
Kaneko
M
M
Kono
N
N