Micro-Kjeldahl procedures are described for determination of nitrogen in certain organic compounds containing nitrogen to nitrogen and nitrogen to oxygen linkages.One procedure gives excellent results with azo and nitro compounds, oximes, isoxazoles, hydrazines, and hydrazones, while the

A micromethod for determining sulfur is presented which employs the Carius combustion followed by titration of the resulting sulfate with barium chloride. The tetrahydroxyquinone indicator method of Ogg, Willits, and Cooper is used. HE use of the tetrahydroxyquinone indicator (prepared by W.

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