Figure 5From: Dual-lifetime referencing (DLR): a powerful method for on-line measurement of internal pH in carrier-bound immobilized biocatalystsCalibration of the intraparticle pH determination by DLR. Panel A. Phase shift in response to pH. Panel B. Relationship between pH and phase shift. Experiments were performed in 50 mM PPB at 37°C. In panel B, symbols show data and the line is the fit to Equation 2, using the parameters in Table 1Back to article page