Spectrophotometric determination of small amounts of tellurium in hydrochloric acid solutions
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Abstract
Tellurium in the tetravalent state in hydrochloric acid solutions forms moderately strong complexes that absorb in the ultraviolet region. The spectrum consists of a number of bands characterizing various tellurium-containing particles. Solutions with high HCl content (5-10 mol/l) and low tellurium content (10-6-10-3 mol/l) have buffering properties. The proportion of different forms of tellurium-containing particles depends little on the total concentration of tellurium and is determined by the concentration of hydrochloric acid.
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References
- Iofa B. Z., Van-Van-Xin, Rydvan M. extraction of complex acids with oxygen-containing solvents. VI. extraction of quadrivalent tellurium. Radiochemistry, 1966, Vol. 8, p. 14.
- Shikheeva L. V. Spectrophotometric study of equilibria in hydrochloric acid solutions of four-valent tellurium. JNCh, 1968, Vol. 12, p. 2967.
- Hanson M. W., Bradbury W. S., Sag11op J. K-Anal. Chem. 1957, v. 29, p. 490.
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