The Effects of Purge Flow on USEPA Method 524.3 Compounds
During volatile analysis, samples are purged with an inert gas in order for the Volatile Organic Compounds (VOCs) to be swept out of the sample matrix and onto an analytical trap. For years, the established purge flow rate and time has been 40ml/min for 11 minutes. USEPA Method 524.3 changed this. This new method allows for different purge flows and times and outlines recommended and allowable ranges. This application will examine how different purge flows and times affect compound performance for Method 524.3.
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