Transcript
Jeffrey Reid Slide 1/18 NEMC, August 4, 2014
Concentrations of Samples Complying to US EPA 8270
BUCHI Corporation
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• US EPA SW 846-8270
• Overview of parallel evaporation
• Importance of solvent recovery
• US EPA SW 846-8270, analytical results
• Summary
• Questions
Content
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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
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Workflow
US EPA SW 846-8270
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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
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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
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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
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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”
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No air pollution by organic or chlorinated solvents • Chlorinated solvents are
(potential) carcinogens • Safe laboratory • Clean atmosphere
Importance of solvent recovery Environmental aspects
Sustainable Safe
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Importance of solvent recovery Two solvent recovery sources
Primary solvent recovery source
Secondary solvent recovery source
> 95 % solvent recovery
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Analytical results: Phoenix Environmental Laboratories, Inc.
US EPA SW 846-8270 results
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Flushback module
US EPA SW 846-8270 results
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How it works
US EPA SW 846-8270 results
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Improved recoveries US EPA SW 846-8270 results
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Chilled appendage technology • Less supervision • High reproducibility • Low risk of losing sample • Optical sensor not required
US EPA SW 846-8270 results Reproducibility
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US EPA SW 846-8270 results Reproducibility
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• Elimination of N2 cost • > 95 % solvent recovery • High analyte recovery • Essential reproducibility • Advanced automation
Summary
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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
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