Faecal sterols determination in wastewater and surface water |
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Authors: | Gilli Giorgio Rovere Renato Traversi Deborah Schilirò Tiziana Pignata Cristina |
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Affiliation: | Department of Public Health and Microbiology, University of Torino, Via Santena 5 bis, 10126 Torino, Italy. giorgio.gilli@unito.it |
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Abstract: | A simplified method to detect faecal sterols, as an alternative assessment of environmental faecal pollution is proposed. The aim of this study is the development of a method to determine sterols in water samples avoiding sample filtration through glass fibre filter. The method is based on a liquid-liquid extraction and a final GC-FID determination. The quantified sterols are coprostanol and 24-ethylcoprostanol, while 5alpha-cholestane is used as internal standard. The recovery of coprostanol and 24-ethylcoprostanol in wastewater ranges from 90 to 100% and the detection limit is 1-2 microgl(-1). Moreover the method proved to be useful for the sterols determination in surface water too. |
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