Simultaneous analysis of free and sulfo-conjugated steroid estrogens in artificial urine solution and agricultural soils by high-performance liquid chromatography |
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Authors: | Frank F. Scherr Ajit K. Sarmah |
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Affiliation: | 1. Soil Chemical &2. Biological Interactions , Landcare Research New Zealand , Hamilton, New Zealand;3. Bayer Crop Science , Monheim, Germany;4. Department of Civil &5. Environmental Engineering , University of Auckland , Auckland, New Zealand |
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Abstract: | A simple and robust analytical method was developed to simultaneously detect and quantify 17β-estradiol (E2), estrone (E1), 17β-estradiol-3-sulphate (E2-3S), and estrone-3-sulphate (E1-3S) in aqueous solutions (calcium chloride and artificial urine solutions) and agricultural soils using high performance liquid chromatography and UV detection. The standards for all four compounds were linear in the range of 0.01 to 1.0 μg mL?1 (n = 6) and 1.0 to 20 μg mL?1 (n = 6), respectively, with correlation coefficients > 0.999. The on-column limits of detection at an injection volume of 50 μL and S/N (signal: noise) ratio of 3 were: 9.0 ng mL?1, 10 ng mL?1, 5.0 ng mL?1, and 7.0 ng mL?1 for E2-3S, E1-3S, E2 and E1, respectively. The limit of detection and quantification in artificial urine solution and CaCl2 solution was 1.0 ng mL?1 for all four compounds. Method detection limits for the compounds in the 3 soils ranged from 2 to 2.4 ng g?1 (E2-3S and E1-3S), and 1.0 to 2.9 ng g?1 (E2 and E1), respectively. |
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Keywords: | 17β-estradiol estrone 17β-estradiol-3-sulphate estrone-3-sulphate |
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