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Volatile
Oraganics Compounds Content in Liquid – USEPA Method 204A USEPA Method 204A is used to determine the input of volatile organic compounds (VOC). It is used in the development of liquid/gas protocols for determining VOC capture efficiency (CE) for surface coating and printing operations. A CE test consists of at least three sampling runs. Each run covers at least one complete production cycle, but is at least 3 hours long. The sampling time for each run need not exceed 8 hours, even if the production cycle is not completed. Alternative sampling times are used with the approval of the Administrator. The amount of VOC introduced to the process (L) is the sum of the products of the weight (W) of each VOC containing liquid (ink, paint, solvent, etc.) used and its VOC content (V). The amount of VOC containing liquid introduced to the process is determined as the weight difference of the feed material before and after each sampling run. The VOC content of the liquid input material is determined by volatilizing a small aliquot of the material and analyzing the volatile material using a flame ionization analyzer (FIA). A sample of each VOC containing liquid is analyzed with a FIA to determine V. |
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Last Update: October 25, 2006