Background Investigation on Steroid Estrogens in the Drinking Water Sources in Kunming

In this paper, derivatization and gas chromatography-tandem mass spectrometry were used to test the concentrations of natural Estrone(E1), estradiol(17β-Estradiol, E2), Estriol(E3) and synthetic ethinyl estradiol(17α-ethynylestradiol, EE2) in the drinking water sources of Kunming. The detection limits of E1, E2, EE2 and E3 were 1.98, 1.86, 2.57 and 1.93ng/L, respectively.The concentrations of four estrogens in the six main drinking water sources(Songhuba, Dahe, Qingshuihai, Yunlong, Baoxianghe,Ziweicun Reservoir) in the main urban area of Kunming were all lower than the detection limits, indicating that steroid estrogens were not detected.