A novel carbon paste electrode (CPE) chemically modified with a newly synthesized Zn-metal organic framework (Zn-MOF) was synthesized for Ni(II) ion determination with impressing enhancement in sensitivity and selectivity over the preceding studies. Due to their electrocatalytic and substantial surface area criteria, MOFs are a reasonably new category of fascinating materials for precise electrochemical detection. Under the sonication condition, a novel Zn-MOF depending on a Schiff base ligand in nano size was synthesized, and it was characterized using different characterization methods such as powdered X-ray diffraction (PXRD), FT-IR, BET surface area, contact angle and scanning electron microscope (SEM) combined with energy dispersive X-ray analyzer (EDX). The BET surface area and contact angle measurement techniques results were 2901.08 m² g⁻¹ and 143.49°, respectively, for the synthesized MOF. It was concluded that under the ideal experimental circumstances, the produced Zn-MOF can extract and sense nickel ions from aqueous solution selectively. Several crucial factors were optimized to gain the ultimate electrochemical response. Response mechanism was proved by the aid of study of morphological change and functional groups chemical shifts. Ultimately, a calibration with a Nernstian slope of 28.75 mV decade⁻¹ over linear concentration limits from 5.0 × 10⁻⁸ to 1.0 × 10⁻¹ mol L⁻¹ (R² = 0.9990) and detection limit of 5.0 × 10⁻⁸ mol L⁻¹ was obtained. The relative standard deviations and recovery ranges of the proposed approach for determining the Ni(II) ion in various water and food tests (n = 5) were 0.94–2.35% and 97.0–104%, respectively.

合成了一种用新合成的锌金属有机骨架 (Zn-MOF) 进行化学修饰的新型碳糊电极 (CPE)，用于测定 Ni(II) 离子，与之前的研究相比，其灵敏度和选择性有了显着提高。由于其电催化和大量表面积标准，MOFs 是一种相当新的用于精确电化学检测的迷人材料。在超声条件下，合成了一种基于席夫碱配体的新型纳米级 Zn-MOF，并使用粉末 X 射线衍射 (PXRD)、FT-IR、BET 表面积、接触法等不同的表征方法对其进行了表征。角度和扫描电子显微镜 (SEM) 结合能量色散 X 射线分析仪 (EDX)。BET表面积和接触角测量技术结果为2901.08 m合成的 MOF 分别为² g ^{-1和 143.49°。}得出的结论是，在理想的实验环境下，生成的 Zn-MOF 可以选择性地从水溶液中提取和检测镍离子。优化了几个关键因素以获得最终的电化学响应。借助于形态变化和官能团化学位移的研究证明了响应机制。最终，在 5.0 × 10 ⁻⁸至 1.0 × 10 ⁻¹ mol L ⁻¹ (R ^{2 = 0.9990) 的线性浓度限值和 5.0 × 10 −8} mol 的检测限度内，能斯特斜率为 28.75 mV decade ⁻¹的校准L ^-1获得。在各种水和食品测试 (n = 5) 中确定 Ni(II) 离子的拟议方法的相对标准偏差和回收率范围分别为 0.94-2.35% 和 97.0-104%。