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Combining microfluidic devices with nuclear magnetic resonance (NMR) has thepotential of unlocking their vast sample handling and processing operationspace for use with the powerful analytics provided by NMR. One particularlychallenging class of integrated functional elements from the perspective of NMRare conductive structures. Metallic electrodes could be used forelectrochemical sample interaction for example, yet they can cause severe NMRspectral degradation. In this study, a combination of simulation andexperimental validation was used to identify an electrode geometry that, interms of NMR spectral parameters, performs as well as for the case when noelectrodes are present. By placing the metal tracks in the side-walls of amicrofluidic channel, we found that NMR RF excitation performance was actuallyenhanced, without compromising $B_0$ homogeneity. Monitoring in situ depositionof chitosan in the microfluidic platform is presented as a proof-of-conceptdemonstration of NMR characterisation of an electrochemical process.

An NMR-compatible microfluidic platform enabling in situ electrochemistry