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EI Correlation schemes

Participating in EI correlation schemes form a fundamental part of any petroleum laboratory’s QA system.

It is a requirement for laboratories accredited to ISO 17025 to participate in interlaboratory comparison or proficiency-testing programmes. Being a member of a recognised scheme provides laboratories with a means to demonstrate their ability to meet high level standards to customers on the performance of the laboratory and the integrity of the results generated.

Inter Centre Precision Monitoring Scheme (ICPMS)

The ICPMS offers laboratories the opportunity to check their performance on a monthly basis using a variety of commercially available products forming an important part of any petroleum laboratory and the integrity of the results generated.

Products available for testing are:

  • Kerosene
  • Motor gasoline
  • Gas oil
  • Fuel oil
  • Bitumen

Each laboratory receives a monthly report which enables them to evaluate their performance relative to other laboratories. An annual statistical report is also sent to each participating laboratory to aid local accreditation records and procedures.

For further details of membership please contact e: icpms@energyinst.org

EI Derived Cetane Number correlation scheme

This scheme is run parallel to and uses the same specially blended diesel fuels that are used for the EI Gasoline and diesel fuel engine correlation scheme. The scheme enables laboratories determining the Derived Cetane Number (DCN) of diesel fuels by either IP 498 or IP 567 to:

  • Compare their results against those determined by other  users
  • Compare the DCN to the mean of that Cetane Number (CN) as determined by IP 41/ASTM D613 in the Gasoline and diesel fuel engine correlation scheme
  • Have a set of secondary working standards with known DCN and CN values that can be used for quality control measurements

For further details of membership please contact EI Technical Team e: dcncs@energyinst.org