The reliability of MOSH/MOAH data: a comment on a recently published article
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Journal of Consumer Protection and Food Safety Journal fu¨r Verbraucherschutz und Lebensmittelsicherheit
OPINION ARTICLE
The reliability of MOSH/MOAH data: a comment on a recently published article Stefanka Bratinova1 · Eddo Hoekstra2 · Hendrik Emons1 · Christoph Hutzler3 · Oliver Kappenstein3 · Maurus Biedermann4 · Gregor McCombie4 Received: 7 April 2020 / Revised: 6 May 2020 / Accepted: 8 May 2020 © The Author(s) 2020
Abstract In this article, we analyse recently published material by Koster et al. (Food Addit Contam Part A, https: //doi. org/10.1080/19440049.2019.1678770, 2019) entitled “Mineral Oil Hydrocarbons in Foods: Is the Data Reliable?”. Koster et al. claim to have traced the reasons for laboratory failures to “deliver robust and reliable test results” for the analysis of MOSH/MOAH in some food matrices, however, a careful review revealed that this publication falls short in considering several aspects of assessing the reliability and comparability of analytical data produced by different laboratories. Keywords MOSH/MOAH · Measurand · Chemical food analysis · Interlaboratory comparisons · Food matrices
1 Introduction Recently, a paper has been published by Koster et al. (2019) entitled “Mineral Oil Hydrocarbons in Foods: is the data reliable?” A careful review revealed that this publication falls short in considering several aspects of assessing the reliability and thus comparability of analytical data produced by different laboratories. One of the fundamental prerequisites for a sound comparison of analytical data consists in the equivalence of the measurand, i.e. the identity and amount of compound(s) addressed by the analytical procedure(s), targeted by each laboratory. This is of special importance for the so-called ’operationally defined measurands’. These are measurement targets for which the identities (e.g. chemical structure) and/ or the measured amount(s) are at least partly dependent on one or more of the (experimental) conditions chosen for the * Stefanka Bratinova Stefanka‑[email protected] 1
European Commission, Joint Research Centre (JRC), Geel, Belgium
2
European Commission, Joint Research Centre (JRC), Ispra, Italy
3
German Federal Institute for Risk Assessment (BfR), Berlin, Germany
4
Official Food Control Authority of the Canton of Zurich, Zurich, Switzerland
applied analytical procedure from sample preparation to data evaluation. This is the case for most of the analytes in chemical food analysis. Consequently, results from different laboratories in interlaboratory comparisons on identical subsamples are only comparable, if each laboratory would apply the same analytical procedure, including harmonised approaches for, e.g., extraction, clean-up and epoxidation and evaluation of the chromatographic signal. However, the laboratories contributing to the study of Koster et al. had only partially provided details on their analytical methods used, and employed different procedures according to the paper. Therefore, the likelihood of targeting differe
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