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首页> 外文期刊>Sensors and Actuators >Simultaneous determination of morphine and codeine using Pt nanoparticles supported on porous silicon flour modified ionic liquid carbon paste electrode
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Simultaneous determination of morphine and codeine using Pt nanoparticles supported on porous silicon flour modified ionic liquid carbon paste electrode

机译：多孔硅粉改性离子液体碳糊电极上负载的铂纳米粒子同时测定吗啡和可待因

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摘要

Pt nanoparticles supported on porous silicon (PSi) flour was synthesized by a simple in-situ redox reaction between PtCl_6~(2-) and PSi, in hydrofluoric acid solution. The components and morphological properties of Pt/PSi nanocomposites were investigated by means of scanning electron microscopy, X-ray diffraction spectroscopy, energy dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy, cyclic voltammetry and electrochemical impedance spectroscopy. Pt/PSi nanocomposite in carbon ionic liquid electrode (C1LE) has synergetic effect on the oxidation of morphine and codeine. Simultaneous determination of morphine and codeine were performed using the proposed sensor by means of adsorptive striping voltammetry. Under the optimum conditions, the oxidation current responses of morphine and codeine were linear in the concentration range of 0.10-25.0 μmolL~(-1). The detection limits of 30.0 and 20.0 nmolL~(-1) were achieved for morphine and codeine, respectively. The electrochemical sensor has high sensitivity toward the analytes with a good reproducibility (due to the high synergetic activity of Pt nanoparticles and good antifouling properties of the ionic liquid). To check the applicability of the sensor, the proposed sensor was used for the simultaneous determination of morphine and codeine in biological fluids with satisfactory results.
机译：通过PtCl_6〜（2-）与PSi在氢氟酸溶液中的简单原位氧化还原反应合成了负载在多孔硅粉（PSi）上的Pt纳米颗粒。通过扫描电子显微镜，X射线衍射光谱，能量色散X射线光谱，X射线光电子能谱，循环伏安法和电化学阻抗谱研究了Pt / PSi纳米复合材料的成分和形态学特性。碳离子液体电极（C1LE）中的Pt / PSi纳米复合材料对吗啡和可待因的氧化具有协同作用。使用所提出的传感器通过吸附溶出伏安法同时测定吗啡和可待因。在最佳条件下，吗啡和可待因的氧化电流响应在0.10-25.0μmolL〜（-1）的浓度范围内呈线性关系。吗啡和可待因的检出限分别为30.0和20.0 nmolL〜（-1）。电化学传感器对分析物具有很高的灵敏度，并具有良好的重现性（由于Pt纳米颗粒的高协同活性和离子液体的良好防污性能）。为了检查传感器的适用性，所提出的传感器用于同时测定生物体液中的吗啡和可待因，结果令人满意。

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