Bigarreau Burlat kernel shell was valorized as an eco-friendly modifier of carbon paste electrode (BBKS-CPE) for simultaneous trace detection of Cd²⁺, Pb²⁺and Cu²⁺ions. The electrochemical investigation by cyclic voltammetry (CV), square wave voltammetry (SWV) and electrochemical impedance spectroscopy (EIS) revels an enhancement in the detection current intensity after the electrode modification. After calibration, the obtained detection limits are 9.56 ppb for Cd²⁺, 8.48 ppb for Pb²⁺ and 9.77 ppb for Cu²⁺under the following optimal conditions: modifier granulometry between 180 and 125 µm, pH= 6, 10% of modifier ratio, acetate buffer as supporting electrolyte, -2 V and 130 s as an accumulation potential and time, respectively. The manufactured electrode exhibited good selectivity and sensitivity towards these ions even in the presence of interferences. This electrode was applied to tap water, seawater and industrial wastewater, good detection limits were achieved. Good recovery was found by comparing the modified electrode response with ICP technique.

Bigarreau Burlat 核壳被用作碳糊电极（BBKS-CPE）的生态友好改性剂，可同时检测Cd 2 ⁺，Pb ²⁺和Cu ²⁺离子。通过循环伏安法（CV），方波伏安法（SWV）和电化学阻抗谱（EIS）进行的电化学研究，在修饰电极后，增强了检测电流强度。校准后，获得的检测限为Cd ²⁺为9.56 ppb，Pb ²⁺为8.48 ppb 和Cu ²⁺为9.77 ppb在以下最佳条件下：改性剂粒度在180至125 µm之间，pH = 6，改性剂比率为10％，醋酸盐缓冲液作为支持电解质，-2 V和130 s分别作为累积电势和时间。所制造的电极即使在存在干扰的情况下也表现出对这些离子的良好选择性和灵敏度。该电极适用于自来水，海水和工业废水，达到了良好的检出限。通过将修改后的电极响应与ICP技术进行比较，发现回收率良好。