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Persistence of Estrogenic Hormones in Agricultural Soils

II. 17-Ethynylestradiol

Agriculture and Agri-Food Canada, Research Branch, 1391 Sandford Street, London, ON, Canada N5V 4T3

View larger version (9K): [in a new window]   Fig. 1. Structure of 17-ethynylestradiol, a synthetic analogue of 17ß-estradiol modified by substitution of position 17 with an acetylene group.

View larger version (13K): [in a new window]   Fig. 2. Dissipation of 1 mg kg-1 17-ethynylestradiol (open triangles) measured by high performance liquid chromatography (HPLC), and removal of yeast estrogenicity screen assay (YES)-detectable estrogenicity (closed triangle) 17-ethynylestradiol in a loam soil adjusted to a moisture content of 15% and incubated at 30°C.

View larger version (33K): [in a new window]   Fig. 3. Dissipation of 1 mg kg-1 17-ethynylestradiol by a loam soil adjusted to a moisture content of 13%, and incubated at 30°C. Nonsterile soil was incubated under an atmosphere of nitrogen gas (left panel) or air (center panel). Soil sterilized by autoclaving was incubated under air (right panel). Error bars indicate standard deviation.