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Facile Fabrication of Zirconia Modified Screen-Printed Carbon Electrodes for Electrochemical Sensing of Phosphate

机译:氧化锆修饰丝网印刷碳电极的电化学电化学合成

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摘要

We report here a facile method to immobilize zirconia nanoparticles on a disposable screen-printed carbon electrode (designated as ZrO_2-SPCE) for phosphate sensor application. Simply by ultrasonicating a bare SPCE in a ZrO_2 slurry, ZrO_2 nanoparticles can be immobilized effectively on the electrode surface as verified by surface characterization evidences. Using ferricyanide as a redox probe, an increase in the charge transfer resistance (R_(ct)) of ferricyanide upon adsorption of phosphate on ZrO_2 is used for the determination of phosphate. This ZrO_2-SPCE phosphate sensor shows a wide linear range up to 1 μM and a detection limit of 1.69 μM (S/N=3). Practical applicability of the ZrO_2-SPCE is demonstrated by detecting phosphate content in human blood samples.
机译:我们在这里报告一种简便的方法,将氧化锆纳米粒子固定在用于磷酸盐传感器应用的一次性丝网印刷碳电极(指定为ZrO_2-SPCE)上。仅通过对ZrO_2浆料中的裸露SPCE进行超声波处理,就可以将ZrO_2纳米颗粒有效地固定在电极表面上,这已得到表面表征证据的证实。使用铁氰化物作为氧化还原探针,将磷酸盐吸附在ZrO_2上时铁氰化物的电荷转移电阻(R_(ct))的增加用于测定磷酸盐。该ZrO_2-SPCE磷酸盐传感器显示高达1μM的宽线性范围,检测极限为1.69μM(S / N = 3)。 ZrO_2-SPCE的实际适用性通过检测人体血液样本中的磷酸盐含量得到了证明。

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