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(a,b) Concentration-dependent fluorescence intensity (FI) increasing effect of a typical D.s.-SP (dissolved in double distilled water) on Polymer-H. The red line results from 7.5 µg/mL Polymer-H in the assay solution (y = 1923x − 8597, r = 0.9997), the black one from 75 µg/mL (y = 2032x − 985, r = 0.9966). At the tenfold Polymer-H concentration, the linear range is parallel shifted to higher D.s.-SP concentrations.
