Abstract
Abstract Composition, stability constants, and other characteristics of the rare earth chelates of murexide were studied. The composition of the chelates at pH 6.0 were determined to be 1:1 (rare earth-murexide); the wavelength of maximum absorption of the dye was 530 mμ and that of the chelates, 480 mμ. The values of log K varied from 4.2 to 5.3 and did not show any particular relationship with the ionic radii.
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