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Proficiency Testing for the Stack Emissions Measurement Industry

NPL’s Emissions and Atmospheric Metrology Group organises a range of UKAS accredited (0016) proficiency testing (PT) schemes in the stack measurements area. NPL is a global leader in the provision of proficiency testing schemes; schemes are available in the areas of stack emissions, environmental radioactivity and gas metrology.

A new scheme will be offered in 2018 covering the measurement of Hydrogen Chloride (HCl) and Water Vapour (H2O) by the Standard Reference Method (wet chemistry).

There are three stack emission PT schemes in operation:

  • Particulate Measurement
  • Gas Measurement and Gas Cylinder for Portable Emissions Measuring Systems
  • HCl and H2O for Standard Reference Method measurements

The Particulate scheme is run bi-annually in May and October with test items sent to participants.

The Gas Measurement and Gas Cylinder scheme will run in late September and early October with measurements made at NPL Teddington. Concentrations are aimed at those found from WI, LCP and Gas Turbine (GT) emission sources.

The HCl and H2O scheme will run in July with measurements made at NPL Teddington. Concentrations are aimed at those found from WI, LCP and Gas Turbine (GT) emission sources.

A PT scheme provides a way of assessing the performance of laboratories by a series of regular inter-laboratory comparisons. Proficiency testing schemes are used by laboratory accreditation bodies as part of the process to assess the ability of laboratories to perform tests and measurements competently for which accreditation is held. UKAS policy on proficiency testing is laid out in their document: TPS 47- : TPS 47 'UKAS Policy on Participation in Proficiency Testing'. The policy states that “all accredited testing laboratories shall participate in PT/ILCs where such schemes are available and relevant to their scope of accreditation”. Participation in a proficiency testing scheme for stack monitoring is also strongly advised by the UK Environment Agency's Monitoring Certification Scheme (MCERTS).

Schedules for the current rounds of each of the schemes can be found in the relevant section on the website.