Type of Document Master's Thesis Author Schneider, Mark S URN etd-122198-111304 Title Analysis of Organic Pollutants by Micro Scale Liquid-Liquid Extraction and On-column Large Volume Injection Gas Chromatography Degree Master of Science Department Chemistry Advisory Committee
Advisor Name Title McNair, Harold M. Committee Chair Glanville, James O. Committee Member Taylor, Larry T. Committee Member Keywords
- Large Volume Injection
- Water Analysis
- Micro Scale Extraction
- Oganic Pollutants
Date of Defense 1998-12-02 Availability restricted AbstractAnalysis of Organic Pollutants by Micro Scale Liquid-Liquid Extraction and On-column Large Volume Injection Gas Chromatography
Mark S. Schneider
Dr. Harold McNair, Chairman
The analysis of organic pollutants in water is traditionally done following EPA procedures which commonly use liquid-liquid extraction. One liter of water is extracted three times with 60 mL of an organic solvent. The extract is concentrated and analyzed by gas chromatography. This procedure is time consuming and can cause losses of semi-volatile components, in addition to requiring a relatively large amount of organic solvent (180 mL). By performing the extraction directly in a GC autosampler vial using one milliliter of contaminated water and one milliliter of organic solvent, then injecting a large volume (~150 mL) of the organic layer taken directly from the vial by an autosampler, the same analysis can be done simpler, quicker, and with much less organic solvent (1 mL).
Filename Size Approximate Download Time (Hours:Minutes:Seconds)
28.8 Modem 56K Modem ISDN (64 Kb) ISDN (128 Kb) Higher-speed Access 1THESIS.PDF 391.89 Kb 00:01:48 00:00:55 00:00:48 00:00:24 00:00:02indicates that a file or directory is accessible from the Virginia Tech campus network only.
If you have questions or technical problems, please Contact DLA.