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. Author manuscript; available in PMC: 2013 Oct 9.
Published in final edited form as: Biosens Bioelectron. 2011 Dec 22;34(1):30–36. doi: 10.1016/j.bios.2011.11.050

Fig.5.

Fig.5

Detection of catecholamine release from a small population of chromaffin cells trapped in the microfluidic device. Secretion of catecholamines was evoked by exposure to high K+.

(a) oxidation current is plotted against time during the stimulation of chromaffin cells in the microfluidic device with Tyrode’s solution containing 50mM of potassium. The perfusion rate was 1 nL/s. (b) optical image of the chromaffin cells trapped in the microfluidic device during the experiment. (1) microfluidic channel; (2) filter; (3) cells culture volume; (4) chromaffin cells; (5) working electrode – IrOx; (6) counter electrode – Pt; (7) 50mM K+ solution separated by an air gap.