SiREM technician loading GC auto-sampler for headspace analysis of dissolved hydrocarbon gases.

SiREM offers competitively priced specialty chemical analytical services to monitor remediation processes and progress including:

  • Dissolved hydrocarbon gases
  • Volatile fatty acids
  • Anions

Dissolved Hydrocarbon Gas Analysis

SiREM’s custom gas chromatographic dissolved hydrocarbon gases (DHG) analysis is based on a modified RSK-175 method developed by the US EPA. DHG analysis is used to quantify aqueous concentrations of methane, ethene, ethane and can also quantify propene.

Use SiREM DHG Quantification to:

  • Confirm complete dechlorination of chlorinated ethenes, ethanes and propanes
  • Quantify methanogenesis
  • Quantify gases used in cometabolic remediation

TOC-Testing Chart

Chart on left is predominantly acetate and not ideal for hydrogen generation/dechlorination. Chart on the right has acetate and other VFAs and is a more optimal electron donor

Volatile Fatty Acids Analysis

Volatile fatty acids (VFAs) quantification in groundwater is used to assess electron donor status in bioremediation systems. When commonly used electron donors including lactate, emulsified vegetable oils (EVO) and alcohols are fermented to VFAs, it indirectly indicates hydrogen generation. Quantification of VFAs also provides additional insights into electron donor status compared to total organic carbon (TOC) analysis. SiREM uses a custom ion chromatographic method for VFA quantification, capable of quantifying lactate, acetate, propionate, formate, butyrate and pyruvate.

Use SiREM VFA Quantification to:

  • Minimize unnecessary electron donor application leading to more effective and efficient use of electron donor and reduced costs
  • Confirm the fermentation of slow release and soluble electron donors
  • Determine the need for additional electron donor

Contact SiREM for more information on our line of analytical services