Fig. 6
Representative chromatogram of a 2 μg L−1 standard mixture and of a 0.5 μg L−1 internal standard of the free estrogens analyzed in river water
Fig. 6 | Chemistry Central Journal
Representative chromatogram of a 2 μg L−1 standard mixture and of a 0.5 μg L−1 internal standard of the free estrogens analyzed in river water