Pencil Lead as a Material for Microfluidic 3D-Electrode Assemblies.

ABSTRACT: We present an electrochemical, microfluidic system with a working electrode based on an ordered 3D array of pencil leads. The electrode array was integrated into a plexiglass/PDMS channel. We tested the setup using a simple redox probe and compared the results with computer simulations. As a proof of concept application of the device we showed that the setup can be used for determination of dopamine concentration in physiological pH and ultrasensitive, although only qualitative, detection of p-nitrophenol with a limit of detection below 1 nmol L^-1. The observed limit of detection for p-nitrophenol is not only much lower than achieved with similar methods but also sufficient for evaluation of exposure to pesticides such as methyl parathion through urinalysis. This l

SUBMITTER: Witkowska Nery E 

PROVIDER: S-EPMC6264025 | biostudies-literature | 2018 Nov

REPOSITORIES: biostudies-literature