This article reports on applicability of carbon paste electrodes modified "in situ" with a surfactant in voltammetry to selected inorganic anions. A new method for the determination of iodide is proposed based on ion-pairing of iodide with 1-ethoxycarbonylpentadecyl-trimethylammonium bromide (Septonex). The procedure developed has been tested and verified by means of analyzing both model and real samples.
