Figure 7
From: Direct In Vivo Electrochemical Detection of Haemoglobin in Red Blood Cells
(A) Cyclic voltammograms (from +0.5 V to −1.0 V) were obtained in aqueous 50 mM phosphate buffer at pH 3.5 for the electrochemical reduction of red blood cells at GC-Nf-RBC-3Nf electrodes. Legend shows concentrations of RBC (mg/mL). Scan rate is 0.1 Vs−1. Inset: Reduction peak height corresponding to different concentrations of RBC. The calibration curve observed concentration saturation starting at 1.45 mg/mL (50 × 103 cells/μL). Error bars represent RSD (n = 3; 95% confidence interval). (B) Cyclic voltammograms (from +0.5 V to −1.0 V) were obtained in aqueous 50 mM phosphate buffer at pH 3.5 for the electrochemical reduction of blood at GC-Nf-B-3Nf electrodes. Legend shows concentrations of blood (Cells (x103)/μL). Scan rate is 0.1 Vs−1. Inset: Reduction peak height corresponding to different concentrations of blood. The calibration curve observed concentration saturation starting at 5 × 103 cells/μL. Error bars represent RSD (n = 3; 95% confidence interval).
