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• W2909065093 abstract "Nine NMI/DI participated in the CCQM Organic Analysis WG Track C Key Comparison CCQM-K138 Determination of aflatoxins (AFB 1 , AFB 2 , AFG 1 , AFG 2 and Total AFs) in Dried Fig. Participants were requested to evaluate the mass fractions expressed in ng/g units, of aflatoxins B 1 , B 2 , G 1 , G 2 and total aflatoxin in a dried fig. Aflatoxins are part of the mycotoxin family of contaminants which are a major issue for the food production industry internationally. The CCQM-K138 results ranged from 5.17 to 7.27 ng/g with an %RSD of 10.47 for AFB 1 , ranging from 0.60 to 0.871 ng/g with an %RSD of 11.69 for AFB 2 , ranging from 1.98 to 2.6 ng/g with an %RSD of 10.36 for AFG 1 , ranging from 0.06 to 0.32 ng/g with an %RSD of 35.6 for AFG 2 , and ranging from 8.29 to 10.31 ng/g with an %RSD of 7.69 for Total AFs. All participants based their analyses on Liquid Chromatography, seven utilizing LC-MS/MS with labelled internal standards and two utilizing HPLC-FLD. Linear Pool estimators were used to assign the Key Comparison Reference Values (KCRVs) for B 1 , B 2 , G 1 , G 2 and total aflatoxins. Successful participation in CCQM-K138 demonstrates the following measurement capabilities in determining mass fraction of organic compounds, with molecular mass of 100 g/mol to 500 g/mol, having high polarity (pK ow > -2), in mass fraction range from 0.05 ng/g to 500 ng/g in dried food matrices. It was noted that the results for CCQM-K138 represent a highly challenging set of measurands and involve very low level measurement of complex analytes in a situation where there is very limited availability of appropriate calibration materials. Due to the variability in results the degrees of equivalence for these analytes were reasonably large and this will need to be taken into consideration in the assessment of proposed CMCs. KEY WORDS FOR SEARCH Aflatoxins, AFB 1 , AFB 2 , AFG 1 , AFG 2 ,Total AFs, LCMS/MS, HPLC, Dried Fig, mycotoxins, food contaminants Main text To reach the main text of this paper, click on Final Report . Note that this text is that which appears in Appendix B of the BIPM key comparison database kcdb.bipm.org/ . The final report has been peer-reviewed and approved for publication by the CCQM, according to the provisions of the CIPM Mutual Recognition Arrangement (CIPM MRA)." @default.
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• W2909065093 date "2019-01-01" @default.
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• W2909065093 title "Report on key comparison CCQM-K138: determination of aflatoxins (AFB₁, AFB₂, AFG₁, AFG₂ and total AFs) in dried fig" @default.
• W2909065093 doi "https://doi.org/10.1088/0026-1394/56/1a/08008" @default.
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