1. Jeffrey Reid Slide 1/18NEMC, August 4, 2014
Concentrations of Samples Complying to US EPA 8270
BUCHI Corporation

2. Jeffrey Reid Slide 2/18NEMC, August 4, 2014
• US EPA SW 846-8270
• Overview of parallel evaporation
• Importance of solvent recovery
• US EPA SW 846-8270, analytical results
• Summary
• Questions
Content

3. Jeffrey Reid Slide 3/18NEMC, August 4, 2014
Scope of application
• Determination of the concentration levels of semivolatile
organic compounds (SVOC) in extract prepared from solid
waste, soils, air media, and water samples by gas
chromatography/mass spectrometry (GC/MS)
• For example
US EPA SW 846-8270
Naphthalene Pyrene 1,2, 4 Trichlorobenzene

4. Jeffrey Reid Slide 4/18NEMC, August 4, 2014
Workflow
US EPA SW 846-8270

5. Jeffrey Reid Slide 5/18NEMC, August 4, 2014
Solvent removal of multiple solvents at once
Overview of parallel evaporation
• Evaporate à energy in à heat
• Condense à energy out à coolant
• Energy must be equal

6. Jeffrey Reid Slide 6/18NEMC, August 4, 2014
Utilization of a vacuum source
Overview of parallel evaporation
Why evaporate under vacuum?
• Boiling point depends strongly on
pressure (Clausius-Clapeyron
equation)
• Lower pressure à lower boiling point
Advantages:
• Protect thermo-sensitive samples
• Speed up evaporation
• Eliminate N2 usage

7. Jeffrey Reid Slide 7/18NEMC, August 4, 2014
Overview of parallel evaporation
Syncore® Vortex evaporator overview
Primary solvent
recovery source
Rack and
vacuum cover
Secondary solvent
recovery source
Platform
Vacuum source
Recovered solvent

8. Jeffrey Reid Slide 8/18NEMC, August 4, 2014
US EPA Method 3500C and other concentration methods
• Summary of Methods; section 2.2 à “Solvent recovery
apparatus is recommended for use in evaporative
concentrators. EPA recommends that incorporation type of
reclamation system as a method to implement an emissions
reduction program.”
Source:
http://www.epa.gov/osw/hazard/testmethods/sw846/pdfs/3500c.pdf
Importance of solvent recovery
“Emissions Reduction Program”

9. Jeffrey Reid Slide 9/18NEMC, August 4, 2014
No air pollution by organic
or chlorinated solvents
• Chlorinated solvents are
(potential) carcinogens
• Safe laboratory
• Clean atmosphere
Importance of solvent recovery
Environmental aspects
SustainableSafe

10. Jeffrey Reid Slide 10/18NEMC, August 4, 2014
Importance of solvent recovery
Two solvent recovery sources
Primary solvent
recovery source
Secondary solvent
recovery source
> 95 % solvent recovery

11. Jeffrey Reid Slide 11/18NEMC, August 4, 2014
Analytical results: Phoenix Environmental Laboratories, Inc.
US EPA SW 846-8270 results

12. Jeffrey Reid Slide 12/18NEMC, August 4, 2014
Flushback module
US EPA SW 846-8270 results

13. Jeffrey Reid Slide 13/18NEMC, August 4, 2014
How it works
US EPA SW 846-8270 results

14. Jeffrey Reid Slide 14/18NEMC, August 4, 2014
Improved recoveries
US EPA SW 846-8270 results

15. Jeffrey Reid Slide 15/18NEMC, August 4, 2014
Chilled appendage
technology
• Less supervision
• High reproducibility
• Low risk of losing sample
• Optical sensor not required
US EPA SW 846-8270 results
Reproducibility

16. Jeffrey Reid Slide 16/18NEMC, August 4, 2014
US EPA SW 846-8270 results
Reproducibility

17. Jeffrey Reid Slide 17/18NEMC, August 4, 2014
• Elimination of N2 cost
• > 95 % solvent recovery
• High analyte recovery
• Essential reproducibility
• Advanced automation
Summary

18. Jeffrey Reid Slide 18/18NEMC, August 4, 2014
Thank you
Download environmental Application Notes:
http://www.mybuchi.com/Environmental-applications.11348.0.html
Questions and answers
Additional “Thank You” to:
Greg Lawrence
Lab Manager
Phoenix Environmental Laboratories