Extraction of Gasoline from Soil Samples Using Supercritical Fluid Extraction and GC-MS
By: Tim Abell and Zach Bensley
Purpose
• To create a method to extract gasoline from soil samples.
Importance
• Test contamination of soil after an oil spill.• To see if clean up from an oil spill was
successful.
Procedure
• Sample Preparation (SFE):– Approximately 1.00 g of celite spiked with 0.50 mL
of gasoline.– 3 samples were prepared.
• Placed spiked sample in SFE column.• 50 mL of chloroform in beaker in an ice bath
to capture the extracted gasoline.• Extracted each sample for 30 minutes.
Procedure
• Sample Preparation (GC-MS):– Created Standard with 0.50 mL of gasoline
and 100 mL chloroform.– Each sample mixture was diluted to 100 mL with
chloroform.• Ran standard and 3 sample on GC-MS.
Data
• Standard
Data
• Celite Trial 1
Data
• Celite Trial 2
Data
• Celite Trial 3
Procedure
• Sample Preparation (SFE):– Obtained soil from outside.– Approximately 5.00 g of soil with 0.50 mL gasoline.– 3 samples were prepared.
• Placed spiked soil samples in SFE column.• Placed 50.0 mL chloroform in a beaker in an
ice bath.• Ran each sample for 30 minutes.
Procedure
• Sample Preparation (GC-MS):– Created Standard with 0.50 mL of gasoline
and 100 mL chloroform.– Each sample mixture was diluted to 100 mL with
chloroform.• Ran standard and 3 sample on GC-MS.
Data
• Soil Sample Trial 1
Data
• Soil Sample Trial 2
Data
• Soil Sample Trial 3
Error
• Making soil sample more fine.• Longer run time on SFE for soil samples.• Gasoline and chloroform mixture sat for 6
days.
Conclusion
• Gasoline can be extracted using SFE and condensed in chloroform.
• More work with the method of extraction with soil samples.
Future Work
• Test with different solvents.• Extract non-spiked soil samples.