Salih Fatima Ezzahra, Achiou Brahim, Ouammou Mohamed, Bennazha Jamal, Ouarzane Aicha, Younssi Saad Alami, El Rhazi Mama
Laboratory of Materials, Membranes and Environment, Faculty of Sciences and Technologies, University Hassan II of Casablanca, BP 146, Mohammedia 20650, Morocco.
J Adv Res. 2017 Nov;8(6):669-676. doi: 10.1016/j.jare.2017.08.002. Epub 2017 Aug 7.
A new and simple approach for carbaryl determination in natural sample was proposed using Low Silica X (LSX) zeolite modified carbon paste electrode. LSX zeolite with a porous structure was incorporated into carbon paste electrode in the appropriate portion. The prepared electrode was then characterized using scanning electron microscopy, cyclic voltammetry and electrochemical impedance spectroscopy. Various experimental parameters as the zeolite amounts, pH, accumulation time, and differential pulse voltammetric parameters were optimized. Under optimal conditions, a linear response was obtained in the range of 1-100 µM of carbaryl using differential pulse voltammetry with detection limit of 0.3 µM ( = 3). The sensors showed good selectivity, stability, and reproducibility and has been successfully applied for detection of carbaryl in tomato samples with good recoveries.
提出了一种使用低硅X（LSX）沸石修饰碳糊电极测定天然样品中甲萘威的新的简单方法。将具有多孔结构的LSX沸石以适当比例掺入碳糊电极中。然后使用扫描电子显微镜、循环伏安法和电化学阻抗谱对制备的电极进行表征。对沸石用量、pH值、富集时间和差分脉冲伏安参数等各种实验参数进行了优化。在最佳条件下，使用差分脉冲伏安法在1-100µM甲萘威范围内获得线性响应，检测限为0.3µM（n=3）。该传感器具有良好的选择性、稳定性和重现性，并已成功应用于番茄样品中甲萘威的检测，回收率良好。
