Journal
JOURNAL OF CHROMATOGRAPHY A
Volume 1070, Issue 1-2, Pages 221-224Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.chroma.2005.02.069
Keywords
estrogens; LC-ESI-MS; phenyl column; environmental analysis
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An improved LC-electrospray ionization MS method was established for four estrogens (17 beta-estradiol (E2), estriol (E3), estrone (E1), and ethynyl estradiol (EE)) in environmental water. Almost complete separation of all estrogens was achieved on a phenyl column with methanol/water as the mobile phase. Quantification was achieved in the negative ionization mode using selected ion monitoring. The instrumental detection limits were 20-30 ng/l for the four analytes. In Milli-Q spiked water, the recoveries of the four estrogens were 72-81%, which was similar to those found for river water spiked with the corresponding deuterated estrogens. The detection limits for the four estrogens in river water were 0.1-0.2 ng/l. The method was used to detect residual estrogens in the Tonghui River, which receives water from a municipal sewage treatment plant in Beijing; E1 (1.1 ng/l) and E2 (0.2 ng/l) were detected. (c) 2005 Elsevier B.V. All rights reserved.
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