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This report describes a new electroanalytical application for the detection of Allura Red (AR) using a carbon paste electrode (CPE) modified with lanthanide oxide and titanium oxide (La OX -Ti OX /CPE). The standard potential (E o ) for oxidation of AR was obtained from the E (V) vs. pH relation with the regression equation E p (V) = À 0.038pH + 0.922, where the intercept on the axis E p (V) is equal to the standard potential. Moreover, the anodic peak current for AR was increased almost 160 % compared to the unmodified electrodes, and this current increase allowed us to obtain a detection limit of 0.09 μmol/L. The active surface area of the modified electrode La-Ti OX /CPE is reported for the first time in this report and was increased by almost 200 % compared to the unmodified electrodes. The usefulness of the new method was tested by analyzing real food samples with acceptable results. The real samples do not need pretreatment before analysis [a] A.

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