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Reference Electrodes Based on Solid Amalgams
Author(s) -
Yosypchuk Bogdan,
Novotný Ladislav
Publication year - 2004
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.200302792
Subject(s) - saturated calomel electrode , electrode , dropping mercury electrode , mercury (programming language) , chemistry , potential difference , reference electrode , analytical chemistry (journal) , amalgam (chemistry) , metal , standard electrode potential , inorganic chemistry , materials science , electrochemistry , chromatography , organic chemistry , computer science , programming language
A reference saturated calomel electrode based on the non‐toxic silver solid amalgam (SCE‐AgSA) as a substitute for liquid mercury is described. Long‐term as well as short‐term tests made during a period of one year confirmed the SCE‐AgSA potential to be equal to that of SCE within the limits of ±1 mV (the difference ΔE SCE‐AgSA =+1.08±0.24 mV (vs. SCE); SD =0.87; N =51). The voltammograms of four selected metal ions registered vs. SCE‐AgSA and vs. SCE could practically overlap each other. None of the mentioned electrodes were polarized to a significant degree even if the electric current applied reached 2 mA. On the basis of the obtained results the SCE‐AgSA could be considered as equivalent substitute for SCE. Owing to practically identical electrode potential of both types of the mentioned electrodes the results obtained using SCE‐AgSA are completely comparable to those measured vs. SCE, without any correction of peak potentials.