| Autor: |
Bauld, T., Teasdale, P., Stratton, H., Uwins, H. |
| Předmět: |
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| Zdroj: |
Water Science & Technology; 2007, Vol. 55 Issue 5, p59-67, 9p |
| Abstrakt: |
The presence of unpleasant taste and odour in drinking water is an ongoing aesthetic concern for water providers worldwide. The need for a sensitive and robust method capable of analysis in both natural and treated waters is essential for early detection of taste and odour events. The purpose of this study was to develop and optimise a fast stir bar sorptive extraction (SBSE) method for the analysis of geosmin and 2-methylisobomeol (MIB) in both natural water and drinking water. Limits of detection with the optimised fast method (45 min extraction time at 60°C using 24 µL stir bars) were 1.1 ng/L for geosmin and 4.2 ng/L for 1 MIB. Relative standard deviations at the detection limits were under 17% for both compounds. Use of multiple stir bars can be used to decrease the detection limits further. The use of 25% NaCI and 5% methanol sample modifiers decreased the experimental recoveries, Likewise, addition of 1 mg/L and 1.5 mg/L NaOCI decreased the recoveries and this effect was not reversed by addition of 10% thiosulphate, The optimised method was used to measure geosmin concentrations in treated and untreated drinking water. MIB concentrations were below the detection limits in these waters. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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