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Colorimetric determination of tellurium4+ in the presence of tellurium6+ and of total tellurium

A. Jílek and J. Vřešťál

Military Technical Academy, Brno

 

Abstract: It was found that Te6+ and Te4+ compds. react with thiourea in the presence of HClO4 with the formation of a deep yellow color of complex Te4+ but with much slower rate. It was found experimentally that the speed of reaction is dependent on pH, concn. of thiourea, and especially on temp. A colorimetric method for detg. Te4+ in the presence of Te6+ and of total Te originally present in the soln. as Te4+ and Te6+ compds. was worked out.

Full paper in Portable Document Format: 71-2a33.pdf (in Czech)

 

Chemical Papers 7 (1-2) 33–39 (1953)

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