Abstract
Geosmin (GSM) and 2-methylisoborneol (MIB) were extracted from water samples, adsorbed in organic solvent microdrop by headspace liquid-phase microextraction (HS-LPME), and were analyzed by gas chromatography-mass spectrometry (GC-MS). Influence factors such as the extraction solvent types, headspace and microdrop volumes, stirring rate, equilibrium and extraction time, and ionic strength for HS-LPME efficiency were thoroughly evaluated. Under optimized extraction and detection conditions, the calibration curves of GSM and MIB were linear in the range of 5-1000 ng/L. The detection limits of GSM and MIB were 1.1 and 1.0 ng/L, respectively. Average recoveries of 95.45-113.7% (n=5) were obtained and method precisions were also satisfactory. Trace levels of the off-flavor compounds at ng/L in tap water and raw water were successfully quantified.
| Original language | English |
|---|---|
| Pages (from-to) | 1544-1557 |
| Number of pages | 14 |
| Journal | Analytical Letters |
| Volume | 44 |
| Issue number | 8 |
| DOIs | |
| State | Published - May 2011 |
| Externally published | Yes |
Keywords
- Gas chromatography-mass spectrometry
- Geosmin
- Headspace liquid-phase microextraction;2-methylisoborneol
- Single-drop microextraction
- Water samples