Catalytic Square-Wave Voltammetric Determination of Acrylamide in Potato Chips

Abstract

Square-wave voltammetry is a fast technique used for determination of trace amounts of acrylamide. When cobalt(II) ions were added to the acrylamide solution, a catalytic peak at about −1.35 V vs. Ag/AgCl was observed, which was proportional to acrylamide concentration. The calibration curve showed good linearity in the range of 200–800 ng mL⁻¹ of acrylamide with a regression coefficient of 0.9989. The limit of detection of the method was 3.52 ng mL⁻¹, and the relative standard deviations for concentrations of 300 ng mL⁻¹ and 700 ng mL⁻¹ were 99.8% × 10⁻² and 79.7% × 10⁻², respectively.

Keywords:

• Acrylamide
• determination
• potato chips
• square-wave voltammetry

The authors thank Shahid Chamran University Research Council for financial support of this work.

Notes

^a Conditions: 500 ng mL⁻¹of AA; 1 µg mL⁻¹ of Co²⁺; 200, 500, and 800 ng mL⁻¹ of AA; 0.1 M KNO₃; nitrogen purge time: 10 s; frequency: 50 Hz; scan increment: 45 × 10⁻⁵ V, pulse amplitude: 19.95 × 10⁻³ V; and large mercury drop size.

^b All cations were prepared from nitrate salts and anions were prepared from sodium and potassium salts.