Electrochemical detection of residual methyl parathion (MPT) has been demonstrated over chemically functionalized and surface interactive CuO encapsulated chitosan grafted polyaniline (CuO-en-CHIT-g-PANI) composite under optimized conditions. The analytical results confirm the formation of CuO-en-CHIT-g-PANI with porous, interactive, and plane aligned crystalline to use as a sensing electrode with electrical conductivity, i.e., 3.75 × 10⁻⁴ S cm⁻¹, reversible interactivity after making a thin film of composite over glass coated with ITO by spin-coated technique. Further, the developed electrode is explored for potentiometric sensing of MPT in natural and artificial samples after monitoring of surface-induced potential under optimum conditions, i.e., pH = 7.0 and 25 °C. The observed parameters are linear ultrasensitive concentration range 2.0–100 × 10⁻⁶ m, sensitivity 3.0408 mV µm⁻¹ cm⁻², detection limit 0.1 × 10⁻⁶ m, time of response 180 s, time of recovery 20 s, and stability for 70 d. Further, the mechanism for sensing MPT has explicated through observed potential and associative oxidative interactions between MPT and sensing electrode.

中文翻译：

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结构功能化氧化铜包封壳聚糖接枝聚苯胺复合材料，用于甲基对硫磷的电位检测

残留甲基对硫磷 (MPT) 的电化学检测已在优化条件下通过化学功能化和表面相互作用的 CuO 包封壳聚糖接枝聚苯胺 (CuO-en-CHIT-g-PANI) 复合材料得到证明。分析结果证实了形成具有多孔、相互作用和平面排列的晶体的 CuO-en-CHIT-g-PANI 可用作具有导电性的传感电极，即 3.75 × 10 ^-4 S cm ^-1，通过旋涂技术在涂有 ITO 的玻璃上制作复合薄膜后的可逆相互作用。此外，在最佳条件下（即 pH = 7.0 和 25 °C）监测表面诱导电位后，开发的电极用于天然和人工样品中 MPT 的电位传感。观察到的参数是线性超灵敏浓度范围 2.0–100 × 10 ^-6 m，灵敏度 3.0408 mV µ m ^-1 cm ^-2，检测限 0.1 × 10 ^-6 m，响应时间 180 s，恢复时间 20 s，和稳定性 70 d。此外，通过观察到的 MPT 和传感电极之间的电位和缔合氧化相互作用，已经阐明了传感 MPT 的机制。