Voltohmmetry as an alternative detection method at polycrystalline metal film electrodes

A new method is introduced for the detection of dissolved analytes which ca n be deposited at noble metal electrodes. It is based on the measurement of surface resistance-potential curves at thin-film electrodes and has been n amed voltohmmetry. The measuring principle, fundamental prerequisites and t he necessary experimental set-up are described. As an example the depositio n and dissolution of lead has been studied by cyclic voltohmmetric experime nts at specifically prepared thin-film gold electrodes. The present possibi lities and limitations of surface resistance-potential measurements for ele ctroanalysis are discussed.