E.O. Lawrence Berkeley National Laboratory
APPLICATIONS OF TECHNOLOGY:
- Enviromental assessment
- Air pollutant measurement
ADVANTAGES:
- Integrates vapor and particulate sampling in one device
- Directly detect and determine phase distributions
ABSTRACT:
Lara Gundel and colleagues at Berkeley Lab have developed an adsorbent resin for an organic vapor/particle
sampler that greatly facilitates the direct determination of both
gas and particulate semi-volatile organic air pollutants. These
pollutants include non-polar and moderately polar chemicals such
as polycyclic aromatic hydrocarbons, pesticides, nicotine, phenols
and many other chemicals. The adsorbent resin is applied to annular
denuders used in the sampler to trap the gas phase species before
the airstream passes through a filter and a backup denuder. Extracts
of the denuders and filters are analyzed separately for the semi-volatile
species of interest using gas or liquid chromatography. These resin-coated
denuders provide the means to directly detect and determine phase
distributions of semi-volatile pollutants, compared to current methods
that rely on difference calculations or other tech-niques that are
subject to large positive and negative artifacts. Pollutant trapping
by the sorbent coating is reversible; this recyclable sorbent coating
technology can be incorporated into many other pollutant sampling
and trapping applications.
STATUS: U.S. Patent #6,780,818. Available for licensing
REFERENCE NUMBER: IB-903
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CONTACT:
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Technology
Transfer Department
E.O. Lawrence Berkeley National Laboratory
MS 90-1070
Berkeley, CA 94720
(510) 486-6467 FAX: (510) 486-6457
TTD@lbl.gov |
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