Figure 2From: Dual-lifetime referencing (DLR): a powerful method for on-line measurement of internal pH in carrier-bound immobilized biocatalystsSpectral properties of the luminescent dyes attached to Sepabeads and optical components used for DLR. Excitation (dotted line) and emission (continuous line) spectra of Fluorescein (blue) and Ru(dpp) (red), and a schematic representation of the excitation source (LED) and the filter used for detection (grey area)Back to article page