Abstract
A novel sorbent, dihydroxylated polymethylmethacrylate (DHPMM), coated on hollow-fiber membrane, is used for the polymer-coated hollow-fiber microextraction of trace amounts of natural and synthetic estrogens, such as diethylstilbestrol, estrone, 17β-estradiol and 17α-ethynylestradiol, in aqueous samples. In this procedure, estrogens were extracted using the functionalized polar DHPMM polymer with derivatization using N-methyl- N-(trimethylsilyl)trifluoroacetamide followed by gas chromatography–mass spectrometric analysis. The detection limits for estrogens in aqueous sample were between 0.03 and 0.8 ng l −1 and the calibration curves were linear over the concentration range 0.05–10 μg l −1 and had correlation coefficients of >0.994. The relative standard deviations (RSDs) were <15% ( n = 3). This simple, accurate, sensitive and selective analytical method is applicable to the determination of trace amounts of estrogens in reservoir and potable water samples.
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