ACRYLONITRILE

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ACRYLONITRILE

• Measurements in Ambient Air

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MONITORING

• Started in July, 2003, along with acrolein,
  acetone, ethanol, and acetonitrile
• Samples in canisters collected over 24 hrs
  1-in-12 days in network
• Analyzed by preconcentration GC/MS
• NIST calibration standard used
• Confirmed independently by Dr. Rasmussen

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SOURCES?

• Emission inventory contains little information on
  emissions
• No acrylonitrile manufacturing use in California
• Acrylonitrile used in a wide variety of polymers,
  paints, adhesives, and fibers
• Landfills?
• Polymer extruding operations?

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ONGOING STUDIES

• Not associated with auto exhaust
• Flux chamber constructed to test products for
  offgassing. Emissions ranging from 1 50 ug/gm
  product.
• Samples taken from inside new cars.
  Concentrations of about 2 ppb
• Attempting to identify extrusion operations in
  each district

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FUTURE EFFORTS

• ARB, South Coast, and Bay Area coordinating
  method development, round robin studies,
  collocated samplers, and additional monitoring
• Near source monitoring