
55-31Electrochemical Composition Measurement
Further homogeneous membrane electrodes are silver halide electrodes, where the respective silver
halide (AgCl, AgI, AgBr, Ag
2
S) is pressed into a pellet, placed in a tube, and contacted via a silver wire.
In these substances, silver ions are accordingly able to migrate. Such electrodes have been successfully
used for the selective determination of chloride, bromide, iodide, silver, and sulde ions. Likewise, if
th
e
pe
llets
co
ntain
Ag
2
S together with the silver halides or mixtures of PbS, CdS, and CuS, solid-state
electrodes sensitive toward Pb
2+
, Cd
2+
, Cu
2+
, and SCN
−
can be realized. Moreover, the ...