Figure 7.

UV–vis absorbance at 280 nm of 17α-ethinyl estradiol (EE2) in 50 mM phosphate buffer at pH 7.4 before and after contacting 2.5 cm long β-cyclodextrin modified fiber. The β-cyclodextrin modified fiber yarns were swollen in the given buffer solution before being placed in the measurement cuvette (liquid volume 3 mL) for 30 min. Before light absorbance measurement, the yarns were removed from the cuvettes. The bound EE2 (mg/g CD-fiber yarn) was calculated based on the concentration of EE2 change and weight-length of the yarn.