EPA Method 30B - Mercury in Sorbent Traps

Method Overview

  • Measuring total vapor phase mercury (Hg)
  • Using sorbent trap sampling and extractive or thermal analytical technique
  • Use under relatively low particulate conditions

Target Compounds

  • Elemental Hg(Hg0)
  • Oxidized Hg(Hg+2) - HgCl2

Performance Tips

  • Known volumes of flue gas are extracted from a stack or duct through paired, in stack sorbent media traps at an appropriate flow rate
  • Sorbant trap collection mitigates potential loss of mercury during transport through a probe/sample line.
  • Paired train sampling is required to determine measurement precision and verify acceptability.


  • Samples may qualify to be shipped as a hazardous material. Please call for IATA codes if you need them.


  • Relative Accuracy Test Audits (RATAs) of vapor phase Hg CEMS and sorbent trap monitoring systems
  • New Source Performance Standards (NSPS)
  • National Emission Standards for Hazardous Air Pollutants (NESHAP)
  • Emissions Trading Programs
  • State Implementation Plans (SIPs)
  • Operating permits that require measurement of Hg concentrations in stationary source emissions


  • No, please contact us if you are interested!

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