Spectrophotometric determination of scandium with bromopyrogallol red.
A highly sensitive spectrophotometnc method for scandium with Bromopyrogallolo Red is described;) mierogram amounts of scandium can be determined by measurement 'at 610 mmu and pH 6-1. The molar-absorptivity is 2.4 x 10(4) at 610 mmu. Formation of a 1:1 complex of scandium with Bromopyrogallol Red is confirmed, Common cations interfere, but can be separated completely by three successive ioń-exchange (Steps, so the method can be applied to the determmation of traces of scandium in silicate rocks. Results are quoted for scandiumn in several types of igneous rocks.
Shimizu
T
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Department of Chemistry, Faculty of Liberal Arts and Education, Gunma University, Maebashi, GunmaJapan.