Electrophoresis technetium

The paper electrophoresis experiments carried out to study the mobility of polynuclear technetium clusters in aqueous solutions of HX of varying acidity, as a mobile phase, showed that these clusters were also characterized by reversible reactions such as (5) without leading to destruction of M-M bonds. On the other hand, an autoclave recrystallization of the polynuclear clusters at 200-220°C in an atmosphere of argon from concentrated solutions of HX led to a partial destruction of M-M bonds and the formation of binuclear complexes [Tc2X8]3 and [Tc,X6]2. This indirectly shows that reactions (6) and (7), leading to the destruction of M-M bonds, are likely in solutions of polynuclear clusters [15]. 

Carvalho has studied the separation of technetium from rhenium by electrophoresis and paper chromatography. Good separations can be obtained by electrophoresis using either alkaline hydra2dne sulfate or a solution of SnClj in hydrochloric acid as electrolytes. Both elements can sufficiently be separated by paper... 

Reaction of [TcBrJ-" with citric acid is reported to yield polymeric mono- and dicitrates and monomeric dicitrates of Tc(IV). Complex formation and hydrolysis of Tc(lV) were shown to be competitive reactions. Brown to violet solutions occurred, depending on the molar ratio of citratc/technetium and on the reaction time [370,371], The complex formation of Tc(IV) with nitrilotriacctic acid (H3iita), ethylc-nediaminctetraacetic acid (H4edta), and cyclohexanediaminetctraacetic acid (f data) were studied in aqueous solution by means of ion exchange and electrophoresis [372] and the complex composition of solid di- and trinuclear compounds containing H jnta were analyzed [373]. 

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