Semivolatile Organic Compounds (SVOCs) are similar to VOC compounds in that they can vaporize from liquid or solid forms. However, SVOCs have a lower vapor pressure and boiling point, and cannot be quantified using purge and trap methods. Common SVOC compounds include polynuclear hydrocarbons, phthalates, phenol and nitrobenzene. SVOC compounds are subject to many of the regulatory programs on both state and federal levels.

SVOC compounds can traditionally be split into three categories; bases, neutrals and acids. Compounds are placed into these categories based upon how they are extracted – bases and neutrals are extracted using a chemical with a pH > 7, whereas acids are extracted with a chemical with a pH < 7. Often, SVOC compounds are further divided into a category of 16 compounds called polynuclear aromatic hydrocarbons (PAHs), which are the byproducts of the combustion of coal, oil, wood or similar products.

Eurofins Environment Testing analyzes SVOC samples utilizing GC/MS technology to generate chromatograms that are used to identify and quantify compounds of concern. With certifications covering all states where certification is offered, Eurofins Environment Testing offers SVOC analyses by methods such as 8270, 8270_SIM, 625 and TO-13. Many Eurofins Eurofins Environment Testing labs also offer SVOC analyses for water samples using our Lower Volume Initiative to reduce the sample volume required for extraction from 1000 ml to 250 ml. To learn more, please visit our Lower Volume Initiative page.  

PAHs, alkylated and parent

Low-level GC/MS PAH and Alkyl-PAH analysis have traditionally been performed with the mass spectrometer operating in the selected ion monitoring (SIM) mode.

Working with recent improvements in GC/MS technology, coupled with experience in extract purification techniques, Eurofins Environment Testing developed both SIM and full scan low-level GC/MS PAH analyses. The full scan method preserves the mass spectral matching quality of the regulatory methods. This method balances the need for low detection limits with the need for better qualitative and quantitative certainty. The method is based on method 8270C and NOAA Technical memorandum NOS ORCA 130. Eurofins Environment Testing's full scan method covers all US EPA’s 34 PAHs and Alkyl PAHs that are in "Procedures for the Derivation of Equilibrium Partitioning Sediment Benchmarks (ESBs) for the Protection of Benthic Organisms: PAH Mixtures" published in November 2003 (EPA/600/R-02/013).

LPAHs & passive sampling

Passive sampling is an innovative technique used to measure the freely dissolved concentration (Cfree) of PAHs in sediment porewater, which represents the bioavailable fraction that organisms are actually exposed.

Current passive samplers supported include both in situ (field based) and ex situ (laboratory based) approaches using polyethelene (PE).

SiREM has partnered with Eurofins Environment Testing to offer a comprehensive passive sampling service for measuring available hydrophobic organic compounds in sediment/sediment porewater, surface water, and groundwater. SiREM currently offers both “off the shelf” and customizable passive sampling services for PAHs that includes:

• Rugged, field-tested, ready-to-deploy in situ samplers
• PAHs/alkylated PAHs (EPA 8270 Mod) analysis through Eurofins Environment Testing
• Processing of sampler data to provide results on a dissolved phase basis (e.g., ng PAH/L porewater).