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Combined Voltammetric‐Potentiometric Sensor with Silver Solid Amalgam Link for Electroanalytical Measurements
Author(s) -
Yosypchuk Bogdan,
Novotný Ladislav
Publication year - 2002
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.200290019
Subject(s) - potentiometric titration , amalgam (chemistry) , tartaric acid , electroanalytical method , electrolyte , potentiometric sensor , chemistry , electrode , buffer solution , inorganic chemistry , voltammetry , selectivity , materials science , analytical chemistry (journal) , supporting electrolyte , electrochemistry , chromatography , catalysis , biochemistry , organic chemistry , citric acid
Abstract An arrangement of a combined voltammetric‐potentiometric sensor (CVPS) with a silver solid amalgam link (AgSAL) was designed, comprising a working electrode inserted into an internal solution of a proper depolarizer (e.g., 10 ppm Cu(II) in 0.2 M acetate buffer, 2% tartaric acid), which is separated from the analyzed solution by the AgSAL or other amalgam links. The preparation procedure of the AgSAL was described. The sensor has been successfully tested using solutions at various concentrations of Ag(I) and Hg(II) in various types of base electrolytes, exhibiting good selectivity with respect to Ag(I) or Hg(II) ions. The proportional voltammetric current concentration dependences i p − ln c were obtained and interpreted.