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Title:Evaluation of measurement uncertainty for the methods of analysis used to assess the characteristics of olive oil and olive-pomace oil from commission regulations EEC 2568/91 and EC 1989/2003 : a case sample evaluating the measurement uncertainty for peroxide value
Authors:Bešter, Erika (Author)
Bučar-Miklavčič, Milena (Author)
Butinar, Bojan (Author)
Valenčič, Vasilij (Author)
Files:URL http://www.dlib.si/details/URN:NBN:SI:DOC-ZHQOQEI0
 
Language:English
Work type:Not categorized
Tipology:1.01 - Original Scientific Article
Organization:UPR - University of Primorska
Abstract:Metrology has been present in our scientific knowledge for a long time, but mostly in physical measurements. Chemical measurement can be defined as a comparison of a quantity of measurand and relating it to a unit (e.g. mol/kg).When expressing a result of a measurement, the problem of traceability, validation and the measurement uncertainty (MU) evaluation must be challenged. It is well known that MU is a parameter associated with the result of a measurement that characterizes the dispersion of the values that could reasonably be attributed to the measurand. The EEC document 2568/91 with its annexes gives the methods of analysis to assess the characteristics of olive oils and olive-pomace oils with given limits. The EC document 1989/2003 gives the scheme, the algorithm, the pathway, the decision tree to differentiate between various types of olive oils using the particular determinations based on limits. The major lack of these EC methods is the non-existence of validation parameters, which are crucial in determining the MU (and in accreditation of a laboratory). There are several ways of evaluating (better term than calculating) the MU: with model equation, with use of a certified reference material (CRM) and with participation in a proficiency testing (PT) scheme. MU for a method of analysis is inherent to a laboratory and can serve as a tool for 'measuring' the quality of a laboratory. Unfortunately, there are practically no CRM's in the olive oil testing field. The only way to achieve a usable MU is through participation in PT schemes.
Keywords:CRM, EEC 2568/91, EC 1989/2003, metrology, olive oil, PT scheme
Year of publishing:2007
Publisher:Centro di ricerche scientifiche della Repubblica di Slovenia
Number of pages:str. 123-132
Numbering:Letn. 17, št. 1
ISSN:1408-533X
UDC:665.327.3:54.088
COBISS_ID:1238483 Link is opened in a new window
Views:1592
Downloads:14
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Secondary language

Language:Slovenian
Keywords:CRM, EGS 2568/91, ES 1989/2003, metrologija, oljčno olje, shema PT

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