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Posts Tagged ‘Hydrocarbons’

Improved Method for Petroleum Hydrocarbons in Solids

Friday, March 1st, 2013

By Mark Hugdahl, Technical Director, ALS Environmental – Canada

Beginning April 1, 2013, the ALS Environmental laboratory in Winnipeg will begin the use of a new and improved analysis method for Petroleum Hydrocarbons in soils and other solids. The Microscale Solvent Extraction (MSE) Technique has been used successfully at other ALS Canada laboratories for almost five years and is now available at ALS Winnipeg as a CALA accredited test procedure.

The MSE method, also known as the “Tumbler” extraction technique, will be used for the analysis of CCME Petroleum Hydrocarbon fractions (F2-F4G) in soils, sediments, sludges, and wastes. The method has been demonstrated to meet all regulatory requirements specified by CCME and all provincial jurisdictions where ALS Canada operates.

Read more about Petroleum Hydrocarbons in Solids…

Polycyclic Aromatic Hydrocarbons (PAH) in Shellfish

Friday, May 28th, 2010

Polycyclic Aromatic Hydrocarbons (PAH) in Shellfish


Columbia Analytical Services, Inc. has extensive experience testing for low levels of Polycyclic Aromatic Hydrocarbons (PAH) in shellfish. Sensitive and selective techniques were developed over ten years ago and have been refined and improved on a continuing basis. In addition to the analysis for the common parent compounds, levels of the associated alkylated homologs can also be determined.

This analysis is typically performed using Gas Chromatography/Mass Spectrometry (GC/MS) operated in the Selective Ion Monitoring (SIM) mode. Key to the analytical procedure is proper sample preparation, which begins with shucking, compositing (as appropriate to the project plan), and homogenization via mechanical mixing. The preliminary preparation must be performed under clean laboratory conditions to prevent common PAH contamination. Decontamination of sample preparation equipment is performed and monitored closely to assure clean conditions. The sample homogenate is a homogenous slurry when prepared correctly. The homogenization techniques performed by Columbia Analytical have been inspected and approved by various organizations (e.g. US EPA, other federal government and state regulatory agencies, private industries, consultants, etc.) The data results for these projects were subjected to thorough government, public and private scrutiny.

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