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View Actual EPA Method 5032 (PDF File)
EPA Method 5032:VOLATILE ORGANIC COMPOUNDS BY VACUUM DISTILLATION
Summary:The sample is introduced into a sample flask which is then attached to the apparatus. The sample chamber pressure is reduced using a vacuum pump and remains at approximately 10 torr (vapor pressure of water) as water is removed from the sample. The vapor is passed over a condenser coil chilled to a temperature of -10oC or less, which results in the condensation of water vapor. The uncondensed distillate is cryogenically trapped on a section of 1/8 inch stainless steel tubing chilled to the temperature of liquid nitrogen (-196oC). After an appropriate distillation period which may vary due to matrix or analyte group, the condensate contained in the cryotrap is thermally desorbed and transferred to the gas chromatograph using helium carrier gas.
Scope:Method 5032 is used to determine volatile organic compounds in a variety of liquid, solid, oily waste matrices, and animal tissues. This method is applicable to nearly all types of matrices regardless of water, soil, sediment, sludge, oil, and biota content.
Report Number:SW-846 Ch 4.2.1