The determination of hydrogen peroxide in aqueous solutions by square wave voltammetry.
Hydrogen peroxide in aqueous solutions can be determined directly by square wave voltammetry. The method is applicable to samples with a large range of pH in matrices ranging from distilled de-ionized water to sea-water. Its dynamic range extends from 0.5 to at least 1000 microM and the precision is about +/-6% at 2.5 microM and +/-2% at 215 microM. In comparison to DC and differential pulse polarography, by using square wave voltammetry the scan time is reduced from minutes to a fraction of a second, the sensitivity is increased by several-fold and the dynamic range has been greatly expanded at both the lower and the upper end by at least an order of magnitude. The low detection limit allows this method to be applied to the determination of H(2)O(2) in some samples of rainwater.
Zhang
L S
LS
Department of Oceanography, Old Dominion University, Norfolk, VA 23529-0276, U.S.A.
Wong
G T
GT