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.
Energy Institute Laboratory Correlation Scheme (EILCS)
The EILCS offers laboratories the opportunity to check their performance on a monthly basis using a variety of commercially available petroleum products forming an important part of any petroleum laboratory’s QA procedure.
Laboratories can test up to 3 of the following products per month:
- Jet fuel
- Fuel oil
- Crude oil
Each laboratory receives a monthly and anonymously-coded report that enables laboratories to evaluate their performance at a quick glance.
New participants have the option to enrol for a 6 month trial period. For further information contact Dr. Jim Crighton e: email@example.com
EI Gasoline and diesel fuel engine correlation scheme
Laboratories conducting tests for the assessment of automotive fuel quality must be a member of an inter-laboratory correlation scheme. Membership of the EI Gasoline and diesel fuel engine correlation scheme enables laboratories to meet this requirement for both petrol and diesel fuel engines.
Samples of gasoline or reference blends are tested for both research and motor octane number and diesel fuel for cetane number. Results are statistically analysed and published monthly enabling laboratories to compare their results with the statistical mean. In addition, a yearly results report is issued.
For further details of membership please contact John Phipps e: firstname.lastname@example.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 John Phipps e: email@example.com