Inter-laboratory comparison scheme for fuel sector, LABKAR in Turkey
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Date
2009-08
Authors
Bayrak, Özlem Türker
Okandan, Ender
Üçkardeş, Hale
Journal Title
Journal ISSN
Volume Title
Publisher
Springer
Abstract
Fuel sector is one of the powerful sectors in Turkish industry. The implementation of a new law for regulating the fuel sector had enforced the quality control of fuels sold to public. This resulted in several accredited fuel-testing laboratories to emerge. Thus, a scheme to evaluate their proficiency in measurements became an important requirement. The inter-laboratory comparison scheme LABKAR for gasoline, diesel oil, LPG, lubricating oil and biodiesel samples have evolved to fulfill this need. In this paper, LABKAR is introduced; the results obtained from the program are analyzed and discussed. The kernel densities of the participants' results show that the use of robust mean as a consensus value is appropriate for fuel samples. Although the number of rounds is not enough to derive strict conclusions, it is seen that the performance of the scheme based on the standard deviations and coefficient of variations is improving in each round. It has been observed that the number of laboratories receiving "action" or "warning" is decreasing, which indicates that they are benefiting from the scheme.
Description
Keywords
Inter-Laboratory Comparison, LABKAR, Fuel Sector, Turkey
Citation
Bayrak, Ozlem Turker; Okandan, Ender; Üçkardeş, Hale, "Inter-laboratory comparison scheme for fuel sector, LABKAR in Turkey", Accreditation And Quality Assurance, Vol.14, No.8-9, pp.497-502, (2009).