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Determination
of Volatile Matter Content, Water Content, Density, Volume Solids,
and Weight Solids of Surface Coatings – USEPA Method 24 USEPA Method 24 is used to determine volatile matter content, water content, density, volume solids, and weight solids of paint, varnish, lacquer, or other related surface coatings. The variety of coatings that may be subject to analysis makes it necessary to verify the ability of the analyst and the analytical procedures to obtain reproducible results for the coatings tested. Verification is accomplished by running duplicate analyses on each sample tested and comparing the results with the intra-laboratory precision statements for each parameter. Because of the inherent increased imprecision in the determination of the VOC content of waterborne coatings as the weight percent of water increases, measured parameters for waterborne coatings are replaced with appropriate confidence limits. These confidence limits are based on measured parameters and inter-laboratory precision statements. |
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Last Update: October 25, 2006