𝔖 Bobbio Scriptorium
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Pure picric acid

✍ Scribed by J.S.H.

Publisher
Elsevier Science
Year
1923
Tongue
English
Weight
53 KB
Volume
195
Category
Article
ISSN
0016-0032

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✦ Synopsis

A =ETI-IOD has been developed by which anthraquinone may be determined quantitatively in mixtures containing also phenanthraquinone, anthracene, phenanthrene, phthalic anhydride, phthalic acid, or other oxidation products of anthracene or phenanthrene. It consists essentially in reducing the anthraquinone to the red oxanthranol, using zinc powder and 5 per cent. solution of sodium hydroxide. The red solution is filtered in vacuum and titrated with standard potassium permanganate.

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