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The response of a fiber-optic hydrogen peroxide (H2O2) sensing probe is investigated under a range of pH conditions. The H2O2 optrode is prepared by depositing a thin layer of Prussian blue (PB) onto the tip of a multimode optical fiber, and its detection mechanism is based on the PB/Prussian white (PW) redox reaction. PW is oxidized to PB by H2O2 leading to changes in the absorption of visible light...
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