Abstract
Constant-current enhanced potentiometric stripping analysis (CCEPSA) is similar to potentiometric stripping analysis (PSA) except that during the stripping step in CCEPSA a cathodic current is imposed on the electrode system. The freshly oxidized metal ions in the vicinity of the electrode surface are partially redeposited so that the stripping time is extended. The stripping time and potential-time equations for CCEPSA were derived and verified using the stripping of cadmium(II). Under the most favorable conditions, the sensitivity of cadmium(II) determination was enhanced by a factor of 15.
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