Coulometric Titration with Electrolytically Generated Tin (II) Ion

Coulometric Titration with Electrogenerated Tin(II). Titration of Platinum(IV)

A Coulometric-Titration Coulometer

A highly precise coulometer is described which permits time integration of currents totaling 100 coulombs or more with a precision of about 1 part in 100,000. The current to be integrated oxidizes hydroquinone in an electrolysis cell, producing quinone and acid. The quinone is t hen reduced by constant-current coulometric titration, the end point being indicated by hydrogen-ion concentration me...

Coulometric Titration with Electrogenerated +2 Tin Determination of Iodine, Bromine. and Various Oxidants via Iodometry

Although the roster of coulometric titrations no\\' includes many reactions of classical titrimetry'. the lIse of cl,ectrogeneratecl +2 tin as a coulometric titrant has not previously been reported. We have found that in an acidic bromide medium +4 tin (probably SrlBr6-2) is reduced to the' +2 state (probably SnBr4-2) with 100% current efficiency' at a gold cathode. The formal potential of the ...

Coulometric titration of urea with electrogenerated hypobromite.

A definitive method is described for the indirect assay of several tens of milligrams of urea by coulometric titration. Urea was decomposed in concentrated sulfuric acid using a Kjeldahl flask. Subsequently, the formed ammonium ion was titrated with electrogenerated hypobromite ion in a sodium bromide-sodium tetraborate medium of pH 8.6, with amperometric end-point detection. Parameters affecti...

High Precision Coulometric Titration of Uranium

An improved method for the coulometric assay of uranium and uranium oxide has been developed based on the electrogeneration of Tif II in H2SO,, using Fe(lI) as a catalyst. The endpoint is determined amperometrically. Hydrogen peroxide is used as the oxidant in the dissolution of the uranium to avoid interferences from nitrate. The precision of the method as indicated by the standard deviation o...