Substitution Coordination Approach for Selective Determination of Complex: Pontachrome Violet SW/Fe(III)/Cu(II) System

摘要

The Substitution Coordination for Selective Determination (SCSD) was proposed by studying the complexations of pontachrome violet SW (PCV) with Fe(III) and Cu(II) at pH 5.5. The updated approach to the determination of binding constants of a complex was established by the spectral correction technique (SCT). The substitution complexation Cu(II)+Fe(PVC)->Cu(PCV)+Fe(III) has been applied to the direct selective determination of copper traces by the SCT with a high sensitivity.