NDLI: Multi-component out-of-specification test results: a case study of concentration of pesticide residues in tomatoes

Content Provider	Springer Nature Link
Author	Kuselman, Ilya Goldshlag, Paulina Pennecchi, Francesca Burns, Cathy
Copyright Year	2011
Abstract	A metrological approach is used for investigating multi-component out-of-specification (OOS) test results of pesticide residues concentration in tomatoes. As a case study, 169 test results were obtained in Israel in 2009. Five of the test results were OOS test results exceeding the national legal maximum residue limits (MRL). Only one of them was classified definitely (with more than 0.99 confidence) as caused by a farmer’s/producer’s problem. The other four OOS test results were probably metrologically related, i.e., compatible with MRL when considering the measurement uncertainty associated with the test results. A new parameter—the ratio of a test result to MRL—was proposed for analysis of tomatoes monitoring multi-residue data as a common statistical sample from the same population for different pesticide residues. Weibull distribution was found adequate for modeling the empirical distribution of the parameter values. Probability of future OOS test results was estimated, and global risks of farmer/producer and consumer/buyer were evaluated. Acceptance limits for the test results, such as “warning and action lines” in quality control charts, were calculated by taking into account the measurement uncertainties.
Starting Page	361
Ending Page	367
Page Count	7
File Format	PDF
ISSN	09491775
Journal	Accreditation and Quality Assurance
Volume Number	16
Issue Number	7
e-ISSN	14320517
Language	English
Publisher	Springer-Verlag
Publisher Date	2011-05-04
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Pesticide residues Tomatoes Out-of-specification test results Measurement uncertainty Producer’s and consumer’s risks Acceptance limits Ecotoxicology Biochemistry Food Science Analytical Chemistry Marketing Commercial Law
Content Type	Text
Resource Type	Article
Subject	Chemistry Instrumentation Chemical Engineering Safety, Risk, Reliability and Quality

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