Figure 6From: Electrospun nanofiber sorbents for the pre-concentration of urinary 1-hydroxypyrene SEM images. Polystyrene (a), CA (b), SDVB (c), PVBC (d), PSO/DMF (e), PSO/Py (f), ST/NaST.SO3 (g), PET (h), nylon 6 (i), ST/Methacrylic acid (j), and ST/Acrylamide (k).Back to article page