Original scientific paper

Electrochemical Kinetic Measurements and Metal Speciation with the Vibrating Dropping Mercury Electrode

Milivoj Lovrić ; Center for Marine Research Zagreb, »Ruder Boskovic« Institute, POB 1016, Zagreb, 41001, Croatia, Yugoslavia
Tomislav Magjer ; Center for Marine Research Zagreb, »Ruder Boskovic« Institute, POB 1016, Zagreb, 41001, Croatia, Yugoslavia
Marko Branica ; Center for Marine Research Zagreb, »Ruder Boskovic« Institute, POB 1016, Zagreb, 41001, Croatia, Yugoslavia

Abstract

The vibrating dropping mercury ele·ctrode (VDME) is applied
to the characterization of ionic species and to electroanalytical
measurements of metal ion concentrations in water samples
strongly polluted with different kinds of surface active
substances (SAS). The Cd2+ /CdNTA- system in citrate buffer
solution at pH = 6 was chosen as a model for the effect of a
preceeddng homogeneous chemical reaction on the reveraible
charge transfer of »free« metal ions. The influence· of Triton-
X-100 on the Cd2+ poiarographic wave is a good example of
nonionic SAS interference with metal ion charge transfer. The
possibilities of the VDME for electrochemical measurements of
methylene-blue and iatrorubine in NaCl and KN03 supporting
electrolytes are discussed. The VDME with its short drop li.fe
time of up to 200 drops/s is more convenient and reliable than
other kinds of electrodes for kinetic measurements and for the
analysis of samples which are highly polluted by organics.

Keywords

Hrčak ID:

194179

URI

https://hrcak.srce.hr/194179

Publication date:

15.2.1984.

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