Solvent extraction of the indium-alizarin Red S chelate as its 1,3-diphenylgaunidium salt.
The extraction of the 1,3-diphenylguanidiuin (DPG) salt of the indium-Alizarin Red S (ARS) chelate with n-butyl acetate has been investigated. The extracted species has an absorption maximum at 525 nm, and Beer's law is obeyed over the range from 0.3 to 2.8 ppm of indium. The molar absorptivity is 2.65 x 10(3) l.mole(-1).mm(-1) at 525 nm. The 1:3 indium(III)-ARS chelate is extracted from aqueous solution in a 1:3 molar ratio with DPG. The infrared spectrum implies that the metal ion is probably chelated by the two phenolic oxygen atoms of ARS.
Otomo
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M
Department of Chemistry Hirosaki University Hirosaki, Japan.
Tonosaki
K
K