Rapid extraction and separation of VOCs from soil with SPME and short capillary columns
- Supelco, Inc., Bellefonte, PA (United States)
Volatile organic compounds (VOCs) are among the most common chemical pollutants tested for in soil, sludge, drinking water and waste water. The US EPA methods describe the use of thick-film capillary columns for separating VOCs. Methods 502.2, 524.2, 624.2, 8,240, 8,260 and CLP-VOA normally specify purge-and-trap sample preparation/introduction systems connected to 0.530 mm ID fused silica columns. These requirements have been satisfied with long 0.53 mm ID capillary GC columns (75--105m), thick stationary phase films (3.0 {micro}m) and unique stationary phases. However, each purge-and-trap analysis takes 60--90 minutes to complete. The authors demonstrate VOC analyses performed with short, small-diameter open tubular columns via purge-and-trap with continuous splitting and via solid phase microextraction (SPME). The goal for this work was to reduce total analysis time by reducing the GC cycle time and sample extraction time. Comparison of purge-and-trap and SPME of VOCs in soil will be examined in order to accomplish the goal.
- OSTI ID:
- 398236
- Report Number(s):
- CONF-9511137--; ISBN 1-880611-03-1
- Country of Publication:
- United States
- Language:
- English
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