S. A. Listov

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In the scientific literature, the analysis of thyroidin is represented mainly by the methods of "dryU and "wet" mineralization and combustion in a flask with oxygen [i, 3, 4, 8, 9]. The general disadvantage of all these methods is their long duration and their labor-consuming character. The analysis involves definite difficulties, due to the complex(More)
Conventional methods of the determination of sulphur in organic drugs were studied (Schöniger method) and new methods developed. Emphasis was put on the disturbance effect of 5 elements, which often occur in the structure of organic drug compounds. It could be shown, that the disturbance effect of nitrogen and chlorine was overcome by the use of carbamide(More)
Investigations have been made with the aim of drawing up a new and all-sided comparative evaluation of various known methods for the microdetermination of iodine in order to select the optimum procedures for the quantitative analysis of this element in materials of animal and plant origin. The efficacy of the use of the method of combustion in a flask with(More)
Another possible method for the quantitative determination of iodine in thyroidin is that of combustion of a sample of the preparation in a flask with oxygen. Already, after the first investigations of Schoniger [19, 20], this method has been successfully used in the analysis of organic iodine-containlng drugs [6, 13, 20]. As a result, the widely used(More)
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