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A rapid automatic method for the determination of oxygen in organic substances, using coulometry at controlled
1Department of Analytical Chemistry University of Lund P.O.B. 740, S-220 07 Lund 7, Sweden.
Abstract:
An Unterzaucher apparatus for the determination of oxygen in organic compounds is used. The iodine vapour formed in the anhydroiodic acid tube is led by a stream of nitrogen to the cathodic chamber of an electrolysis cell. Here the iodine is reduced at controlled potential at a rotating Pt-eiectrode. The amount of electricity used is determined by an electronic integrator and read from a digital voltmeter. For weights of samples in the range 0.5-6 mg the standard deviation is about 0.08% oxygen.
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