In this study, a sensitive electrochemical voltammetry method for the analysis of p-anisidine (pA) using a carbon paste electrochemical (CPE) modified with a porous material, such as natural phosphate (NP), was proposed. p-anisidine strongly adsorbed on a electrode surface and prepared electrode NP-CPE provides easy methods for electrochemical quantitative electro-p-anisidine. Operational parameters have been optimized, and performance voltammetric stripping was investigated by cyclic voltammetry (CV). The current intensity peaks are very linear, with good sensitivity NP- CPE.