Determination of Glycerol in Biodiesel Using a Nickel(II) Oxyhydroxide Chemically Modified Electrode by Cyclic Voltammetry

Abstract

Abstract A glassy carbon electrode chemically modified with nickel oxyhydroxide from a nickel hexacyanoferrate (NiHCF) film was used to determine glycerol in biodiesel by cyclic voltammetry. The modified electrode exhibited a linear response to glycerol concentration in the range from 0.05 to 0.35 mmol L −1 , and a detection limit of 0.030 mmol L −1 . The glycerol concentration found in the biodiesel sample was 0.156 mmol L −1 . The method developed in this study showed a recovery of (100.3±5.0)%.