Copper (II)-Catalyzed Oxidation of Ascorbic Acid: Ionic Strength Effect and Analytical Use in Aqueous Solution

Copper is an important metal both in living organisms and the industrial activity of humans, it also a distributed water pollutant toxic agent capable inducing acute chronic health disorders. There are several fluorescent chemosensors for copper (II) determination solutions; however, they often difficult to synthesize solvent-sensitive, requiring non-aqueous medium. The present paper improves known analytical technique ions, where linear dependence between ascorbic acid oxidation rate constant concentration used. limits detection quantification analysis kinetic method determined be 82 nM 275 nM, respectively. In addition, selectivity chosen indicator reaction shown: Cu2+ cations can quantified presence 5–20 fold excess Co2+, Ni2+, Zn2+ ions. La3+, Ce3+, UO22+ ions do not catalyze reaction. effect common background electrolytes studied, anomalous influence chloride-containing salts observed discussed.