Carbonized Aramid Fiber as the Adsorbent for In-Tube Solid-Phase Microextraction to Detect Estrogens in Water Samples

Figure 6

Chromatograms of aramid fiber and aramid fiber carbonized at different temperatures. Peaks: (1) bisphenol A, (2) ethynylestradiol, (3) diethylstilbestrol, (4) hexestrol, and (5) estrone. Conditions: sampling volume, 50 mL; sampling rate, 2.00 mL/min; and desorption time, 2.0 min. Mobile phase: water/acetonitrile (53 : 47, v/v); detection wavelength, 202 nm; and room temperature.