A simple, rapid and semi-automated method for the determination of inorganic, organic and total phosphorus in lake and river sediments is described. Total phosphorus is extracted from sediments with 1 N hydrochloric acid after

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Dithiocarbamic acids have been investigated with regards to their monobasic or dibasic characteristics using three methods of analysis. The variation of the summit potentials for oxidation of dithiocarbamic acids at a dropping mercury electrode in ac polarography enables the determination of acid dissociation constants for the sulfur protonation. This factor, and the rate profiles as a function of pH for the decomposition of several dithiocarbamic acids, is used to interpret the unusual acid-base titration curves of dithiocarbamates. It is concluded that dithiocarbamic acids are monobasic. An explanation is given of the difference in the acid-base properties of dithiocarbamates

The stability of some cyclic N,N-disubstituted dithiocarbamates has been studied by the analysis of the decomposition rates at different pH values. It is concluded that the most important factors which determine the relative stabilities of three cyclic dithiocarbamates (DTC) are the solvation of the DTC acid molecule and the ring strain associated with the substituents. This has been proven by a study of (a) the decomposition rates as a function of the dielectric constant of the medium, (b) order of the stability, and (c) activation energy.The molar absorptivities and the apparent acid dissociation constants have been determined for pyrrolidine-, piperidine-, and hexamethylene-dithiocarbamates.