Fig. 1

Relationship between suspended fluorescence and mass of polystyrene particles in exposure media. A: The increase in fluorescence for both particles was similar to standard dilution at T_{0 h}. B: After 96 h of experiment the fluorescence in suspension at exposure media at 100 mg L⁻¹ dropped to c.a. 17% and 56% of T_{0 h} for 100 nm and 50 nm, respectively. Points represent average of 5 replicates, dashed lines represent regression lines, and in 1A shadow area represents standard error of regression