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. Author manuscript; available in PMC: 2021 Feb 16.
Published in final edited form as: Trends Analyt Chem. 2020 Oct 20;132:116049. doi: 10.1016/j.trac.2020.116049

Fig. 1.

Fig. 1.

No-net-flux microdialysis to determine the extracellular concentrations of analytes in the brain. A microdialysis probe is inserted into the brain region of interest and perfused with a known concentration of analyte. When no net flux through the semipermeable membrane is established, the known perfusate concentration is equal to the extracellular concentration. Dialysate flows through the outlet and is collected for external analysis.