Development of an Improved VOC Analysis Method for Architectural Coatings
This page updated April 2, 2009
Chair’s Air Pollution Seminar |
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Monday, April 20, 2009
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Development of an
Improved VOC
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Dane Jones, Ph.D.
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To improve air
quality in California, regulations have been adopted to reduce volatile
organic compound (VOC) emissions from application of architectural
coatings. With lowered VOC limits, regulatory enforceability problems
have developed, because the standard method (EPA Method 24) for
determining VOC content of coatings is an indirect method of measuring
VOCs. Therefore, Method 24 is unreliable for the analysis of low-VOC
water-borne coatings, not suitable for determining the VOC content of
solvent-borne coatings containing VOC-exempt compounds or hazardous air
pollutants, and cannot be used to determine VOC levels in two-component
water-borne coatings. Cal Poly developed direct methods of analysis, based on ASTM Method D6886, to determine the VOC content of low-VOC water-borne coatings. These methods also determine the fractional amount of each individual VOC in the coating. Cal Poly used their methods to determine the VOC content of 67 coatings samples chosen from the ARB’s 2001 Architectural Coatings Survey. Twelve coatings were selected for a mini-round robin validation study of the methods developed. By comparing their VOC content results with those obtained using EPA Method 24, Cal Poly showed their new methods were significantly more accurate than Method 24 for nearly all classes of coatings. These results enabled Cal Poly to write a unified architectural VOC testing manual for use by California air districts.
Dane Jones Ph.D., is Professor of Chemistry in the
Department of Chemistry and Biochemistry at California Polytechnic
State University, San Luis Obispo. Dr. Jones received his Ph.D. in
Physical Chemistry from Stanford University. Dr. Jones has participated
in several CARB projects dealing with coatings. Professor
Jones has authored publications on the analysis of the composition of
architectural and aerosol coatings, the development of species profiles
for architectural coatings, and the development of new VOC analysis
methods for coatings.
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