Volatile organic compounds by GC/MS measurement context
EPA Method 624, purge and trap GC/MS: an inert gas is bubbled through the sample, the volatile compounds are caught on a trap, then released into the gas chromatograph and identified and measured by their mass spectra. The scan covers 35 compounds, including vinyl chloride, methylene chloride, chloroform, benzene, trichloroethylene, tetrachloroethylene, toluene, ethylbenzene, xylenes, acetone and 2-butanone (MEK). Solid samples are tested by EPA SW-846 Method 8260D.
Confirm matrix and regulatory context
Environmental water, wastewater and companion solids need explicit applicability review. SW-846 and Clean Water Act methods are not automatically interchangeable for permit reporting.
Include the complete project requirement
Provide the matrix, target analytes, required method, fraction, units and reporting limits. Include the permit or monitoring instructions where results will support a regulatory submission. Naming this method does not establish blanket compliance eligibility.
Resolve collection before sampling
Use the bottle, preservation and delivery instructions assigned to the agreed scope. Identify each location and collection time, and document any deviation. The final analytical plan must fit the submitted material and its intended use.
Related testing & guidance
Technical & service references
Vanguard service detailsSource review: November 8, 2026. The agreed method and project scope govern the testing.