Fig. 4: Calculation of diffusion coefficient.
From: Low-cost fiber-based electrochemical sensor for quantification of acetaminophen in human breast milk
Chronoamperometric analysis of acetaminophen with varying concentrations in pH buffer 7 (A) and undiluted breast milk (D), measured at a bias potential of 0.35 V. The Cottrell behavior of chronoamperometric measurements, showing linear relationship of anodic current vs. the reciprocal square root of time (t−1/2) in pH buffer 7 (B), and milk (E). The Cottrell slope plotted vs. concentration of acetaminophen in pH buffer 7 (C) and in undiluted breast milk (F). All measurements were performed at C-AuNP-SSFf with an external Pt counter electrode, and an Ag-AgCl reference electrode.
