Electrodes of Nontoxic Solid Amalgams for Electrochemical Measurements

0181515 - UFCH-W 20020255 RIV DE eng J - Journal Article
Josypčuk, Bohdan - Novotný, Ladislav
Electrodes of Nontoxic Solid Amalgams for Electrochemical Measurements.
Electroanalysis. Roč. 14, č. 24 (2002), s. 1733-1738. ISSN 1040-0397. E-ISSN 1521-4109
R&D Projects: GA ČR GV204/97/K084
Institutional research plan: CEZ:AV0Z4040901
Keywords : solid amalgam electrodes * voltammetry * electrochemical measurements
Subject RIV: CG - Electrochemistry
Impact factor: 1.783, year: 2002

The preparation, activation and electrochemical pretreatment of electrodes based on nontoxic solid amalgams were described. Testing of metal solid amalgam electrodes (MeSAEs) proved their broad applicability in many respects, e.g., as to the range of working potentials and the level of background currents, well comparable with those of the hanging mercury drop electrode (HMDE). A regeneration of their surfaces before each measurements could be simply automatized using a PC-controlled system providing a reasonable repeatability of voltammetric measurements down to 3% RSD. Combination with stripping techniques at accumulation times t(ac) 300 s the detection limit amounted to the concentration level of 1 ppb Cu(II), Pb(II), Cd(II), Zn(II), etc. Best electrochemical properties were exhibited by the silver solid amalgam electrode (AgSAE). For example, polished AgSAE (p-AgSAE), completely free of liquid mercury, proved satisfactory even at more negative potentials enabling the determination.
Permanent Link: http://hdl.handle.net/11104/0078073