Static and flow-injection voltammetric determination of periodate by reduction at a rotating platinum wire electrode

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Abstract

A method for periodate determination was developed as a result of static and flow-injection voltammetric investigations where a rotating platinum wire electrode was employed. In the static system, 4.0 × 10−5−4.2 × 10−4 M periodate could be determined in the cell in pH 7.0–74.5 phosphate buffer. In the flow-injection system, periodate solutions of 20–100 μl were injected into the carrier stream of a phosphate buffer solution at pH 7.0. The flow rates were in the range of 1.0–1.7 ml min−1. The peak currents were measured at −0.07 V against a saturated calomel electrode. The determination of periodate concentrations in the range 1.0 × 10−5–1.0 × 10−4 M was possible with a throughput of 15–40 samples per hour.

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