Titrations polarometric

Amperometric Titration s(Polarometric Titrations). In a strict sense, the term "ampero-metric should be applied to titrations in which a polagraphic diffusion-controlled limiting current is measured, according to the procedures described in references 3 to 8. This method has to be differentiated from galvanometric titration bf E.Salomon... 

The main advantage of manual instruments is that they are relatively inexpensive, and possess an educational value demonstrating clearly the principles of the polarographic method. The manual instruments can furthermore be advantageously applied to polarometric titrations. 

Fig. 46. Polarometric titration, electroactive substance titrated with an electroinactive reagent.

Fig. 47. Polarometric titration, electro-inactive substance titrated with an electroactive reagent.

Fig. 49. Polarometric titration, substance showing an anodic wave titrated with a substance showing a cathodic wave.

Fig. 50. Polarometric titration, an insoluble salt titrated with a complex-forming reagent.

In polarometric titrations, as in most polarographic measurements, it is desirable to work nearly always in the absence of oxygen. The inert gas used to deaerate the solution, also stirs the solution in a simpler way than most mechanical or magnetic... 

The most frequently used titrating agents in polarometric and amperometric titrations are silver and mercury compounds and some heteropoly acids. It should be stressed once more that little selectivity, especially for precipitation reactions, can be expected and thus in the analysis of mixtures the application of polarometric titrations must be preceded by separation techniques. 

The composition of the nonreducible boric acid-fructose complex was determined by a polarometric titration. 

DoleJal, j. and TAkk, j., Polarometrickd titrace (Polarometric titrations), SNTL, Prague 1961, p. 98 where further references can he found. 

Cystine has also been determined in wool using a polarometric titration< based on the principle that sulphite reacts with... 

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