A method and apparatus for the determination of the volatile organic acids in the gas mixtures.

摘要

The present invention relates to a method and an apparatus for the determination of volatile organic acids, such as acetic acid, propionic acid, valeric acid, butyric acid, and in the case of gas mixtures. It is preferably provided for the analysis of gas mixtures, which in the case of chemical and biotechnological processes, in particular in the case of the biogas. In addition, it is, for example, also in the field of medicine, the environmental analysis, as well as in the foodstuffs control can be used in a versatile manner. The device according to the invention consists essentially of an adsorption - / desorber unit, a sample object system, of a gas chromatographic separating device, a catalysis reactor and a highly sensitive above-mentioned solid electrolyte - detector. In the adsorption - / desorber unit, the volatile organic acids to be measured in a periodic sequence, from the test gas mixture is first extracted by adsorption, and subsequently enriched by the measuring gas to more highly concentrated. In the upstream of the above-mentioned solid electrolyte - detector arranged permanently heated catalysis reactor, the volatile organic acids by catalytic reactions in substances, such as methane and carbon dioxide is converted, and the by means of the solid electrolyte - detector be detected quantitatively.