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Cyclic voltammograms obtained with bare GCE in the absence (a) and presence (b) of estriol, poly(Met)/GCE in the absence (c) and presence (d) of estriol, and Co-poly(Met)/GCE in the absence (e) and presence (f) of estriol. [Estriol] = 0.14 mmol/L in 0.1 mol/L PBS, pH = 7.0, v = 100 mV/s. Inserted graph: Cyclic voltammograms obtained only with Co-poly(Met)/GCE in the absence (e) and presence (f) of estriol.
