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Response of the Cu2+ and Cd2+ Ion‐Selective Electrodes to Solutions of Different Ionic Strength and Ion Composition
Author(s) -
Cavallaro N.,
McBride M. B.
Publication year - 1980
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1980.03615995004400040045x
Subject(s) - ionic strength , ion , electrode , ionic bonding , chemistry , chloride , inorganic chemistry , glass electrode , composition (language) , range (aeronautics) , ion selective electrode , analytical chemistry (journal) , reference electrode , materials science , electrochemistry , selectivity , chromatography , aqueous solution , catalysis , organic chemistry , linguistics , philosophy , composite material
The Cu 2+ and Cd 2+ specific ion electrodes are shown to closely reflect calculated activities of Cu 2+ and Cd 2+ in solution with variable amounts of Cl ‐ and a wide range of ionic strengths. Published stability constants for the chloride complexes of Cd 2+ are consistent with the electrode readings, while those given for Cu 2+ appear to underestimate the stability of the CuCl + species. The Al 3+ ion interferes with electrode measurement of Cu 2+ and Cd 3+ , creating a problem for the use of electrodes in some acid soils.