Applications of Direct Potentiometry

Examples of the recent application of such electrodes in food analysis are given by references [19 to 36]. Quite a few of these represent the apphcation of immobilised enzyme electrodes, since much investigatory work is being done in this area. 

The following provide actual preparatory and measuring details for two specific direct potentiometry analyses of food substances. 

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The application of direct potentiometry with silver bromide precipitate-based ion-selective electrodes for bromide measurements in water samples as been investigated [65]. Cyanide, sulfide, and iodide ions represent the major interferences. A 20 times higher concentration of chloride also can cause positive error. TTierefore, the applicability of direct potentiometry in the analysis of bromide concentration of water samples is limited. 

Birch BJ, Clarke DE (1972) An electrode selective to the dodecyl sulphate animi comments on the application of direct potentiometry to c.m.c. measurements. Anal Chim Acta 61 159-162... 

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