کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1163769 | 1490956 | 2015 | 6 صفحه PDF | دانلود رایگان |
• An all-solid-state Pb2+-ISE with bimodal pore C60 as solid contact is developed.
• The bimodal pore C60-based solid contact is prepared by electrochemical deposition.
• The electrode shows an excellent potential stability with a LOD of 5.0 × 10−10 M.
An all-solid-state polymeric membrane Pb2+ ion-selective electrode (Pb2+-ISE) based on bimodal pore C60 (BP-C60) as solid contact has been developed. A BP-C60 film can be readily formed on the surface of a glassy carbon electrode by electrochemical deposition. Cyclic voltammetry and electrochemical impedance spectroscopy have been employed to characterize the BP-C60 film. The large double layer capacitance and fast charge-transfer capability make BP-C60 favorable to be used as solid contact for developing all-solid-state ISEs. The all-solid-state BP-C60-based Pb2+-ISE shows a Nernstian response in the range from 1.0 × 10−9 to 1.0 × 10−3 M with a detection limit of 5.0 × 10−10 M. The membrane electrode not only displays an excellent potential stability with the absence of a water layer between the ion-selective membrane and the underlying BP-C60 solid contact, but also is insensitive to interferences from O2, CO2 and light. The proposed solid-contact Pb2+-ISE has been applied to determine Pb2+ in real water samples and the results agree well with those obtained by anodic stripping voltammetry.
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Journal: Analytica Chimica Acta - Volume 876, 30 May 2015, Pages 49–54