Studies on the Complexes of Alizarin, Quinalizarin and Erichrome Blue Black R with some Rare Earth- Salts
| Main Authors: | S.M. F. Rahman, Naseer Ahmad, Jamil Ahmad |
|---|---|
| Format: | Article Journal |
| Bahasa: | eng |
| Terbitan: |
, 1968
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| Subjects: | |
| Online Access: |
https://zenodo.org/record/6474855 |
Daftar Isi:
- Alizarin, Quinalizarin and Eriochrome Blue Black R form red, light blue, and dark brown coloured complexes with La, Ce, Pr, Nd and Sm. These complexes have been studied spectrophotometrically. The ʎmax. for alizarin complexes was 535-40 mμ. and that for quinalizarin and Erichrome Blue Black R were 575-85 and 530-35 mμ respectively. Job's method of continuous variation as well as molar ratio method showed a combining ratio of 1:2 (metal:dye) for alizarin and quinalizarin complexes and 1:1 for Eriochrome-rare-earth complexes. The log of apparent formation constant for the Eriochrome complexes was 5.2±0.8.