Thermal analysis of some analogous thiols and their palladium complexes.

Differential thermal analysis (DTA) and thermogravimetric analysis (TGA) have been conducted on several analogous heterocyclic thiols and their complexes with palladium in air, over the temperature range of 25-800 degrees . A rough order of thermal stability of the ligands and the complexes has been deduced.

Amperometric titration of palladium, silver and copper with benzimidazol-2-ylmethanethiol, and its application to non-ferrous materials.

A method is described for the determination of mg amounts of palladium, silver and copper by amperometric titration with benzimidazol-2-ylmethanethiol in acetate buifer medium (pH 4-5) at an applied potential of -0.2 V vs. the saturated calomel electrode. Direct titrations are possible in the presence of a number of foreign ions. Copper and palladium interfere mutually and in the determination of silver. Mercury(I), mercury(II) and platinum(IV) also interfere. Silver does not interfere in the determination of copper and palladium if it is first precipitated as chloride. The method has been successfully applied to the analysis of non-ferrous materials.

Amperometric titration of mercury with a stationary platinum electrode in stirred solutions.

Amperometric titration of mercury (in the range of 0-4 to 3.5 mg) has been carried out with 2-mercaptobenzoxazole with a stationary electrode in stirred solution in a sodium acetate-acetic acid medium.