Figure 8From: Iron specificity of a biosensor based on fluorescent pyoverdin immobilized in sol-gel glassFluorescence of purified pyoverdin solution (3.0 μM) in response to 70 μl of either 89.5 μM ferric chloride (Fe3+) or 89.5 μM ferrous sulfate (Fe2+). Each iron solution was added at the time indicated by the arrow, for a final iron (II or III) concentration of 3.0 μM. (ex/em = 390/452 nm)Back to article page