Gravimetric determination of selenium from perchloric acid solution with hydrazine.
The gravimetric determination of selenium, by reduction of selenious acid in perchloric acid solution with hydrazine hydrate, has been studied in detail. Elemental selenium is completely precipitated in 3.2-5.1M perchloric acid at room temperature or 100 degrees C. One mole of selenious acid reacts with one mole of hydrazine hydrate to give elemental selenium.
Ooba
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National Institute for Researches in Inorganic Materials, Kurakake, Sakura-mura, Niihari-gun, Ibaraki, 300-31, Japan.
Uneo
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