ABSTRACT
In recent years, there has been an increasing demand on the determination of trace environmental estrogen. In this study, a new 17ß-estradiol molecularly imprinted polymer was successfully synthesized on the surface of activated silica gel. This prepared molecularly imprinted polymer was characterized, and found to exhibit good recognition, high selectivity, and a rapid adsorption-desorption dynamic toward 17ß-estradiol. Using the molecularly imprinted polymer as a sorbent, an effective method of solid phase extraction coupled to high performance liquid chromatography for the separation and determination of 17ß-estradiol was developed. Under optimal conditions, the detection limit (S/N = 3) of 17ß-estradiol was 12.0 ng L(-1). The enrichment factor was 198, and the linear range of the calibration graph was 0.05-300 mg L(-1). Blank water samples spiked with 17ß-estradiol at three different levels were analyzed by the developed method to afford recoveries ranging from 82.7% to 103.0%. Moreover, this presented method was applied to the quantitative detection of 17ß-estradiol in a polluted water sample with a level of 0.024 mg L(-1).
