jrc79301_report%20eu-rl%20pahs%20pt%20on%20chocolate%202012_ver11

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Method performance data reported by participants for the determination of BBF and CHR in chocolate. n.r.: not reported 70
µg/kg ANNEX 8: Data reported by participants The data reported by the participants are compiled in the following tables. Uncertainty values that do not comply with the Uf thresholds (individual PAHs), respectively that are not equal to the propagated uncertainties of the individual analytes (SUM4PAH parameter) are marked by bold red font. The results of replicate analyses together with the expanded measurement uncertainty (k=2) reported for the value for proficiency assessment are depicted in the graphs. Red lines indicate the thresholds for satisfactory z-scores. Distribution of individual results of replicate determinations reported for the benz[a]anthracene (BAA) content of the cocoa butter test sample blue triangles: individual results of replicate determinations, blue box: reported expanded measurement uncertainty (k=2), blue horizontal line in blue box: average of replicate determinations, green dotted line: assigned value, green area around assigned value: expanded uncertainty of the assigned value (k=2), red lines: lower and upper limit of satisfactory z-score range 3.4 3.2 3 2.8 2.6 2.4 2.2 2 1.8 1.6 1.4 1.2 1 0.8 0.6 0.4 0.2 0 Sample: Cocoa butter Measurand BAA on product basis No. of laboratories: 46 Limit of tolerance 6015 1029 1002 6001 1013 1011 6020 6010 6013 6004 1005 1028 6012 6011 6019 1007 1012 6005 6007 1017 1001 Assigned value: 1.550 µg/kg (Reference value) Target s.d.: 0.340 µg/kg (Reference value) Range of tolerance: 0.870 - 2.230 µg/kg (|Z Score|
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Report on the 10 th inter-laborator
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Report on the 10 th inter-laborator
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1 Summary This report presents the
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3 Scope As specified in Regulation
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Table 3: List of participating Offi
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The stability of the test material
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8 Design of the proficiency test Th
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Figure 1 and Figure 2 provide overv
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Table 8: Compilation of z-scores ca
Page 19 and 20: Table 9: Compilation of z-scores ca
Page 21 and 22: Table 10: Compilation of z-scores c
Page 29 and 30: 9.4 6Evaluation of compliance with
Page 31 and 32: 13 References 1 EU, COMMISSION REGU
Page 33 and 34: ANNEX 1: Announcement of the PT on
Page 36 and 37: Confirmation of participation 36
Page 38: ANNEX 4: Documents sent to particip
Page 43: GUIDANCE FOR REPORTING 43
Page 48 and 49: ANNEX 5: Technical specifications o
Page 50: ANNEX 6: Homogeneity of the test ma
Page 54: ANNEX 7: Questionnaire and method p
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Page 68 and 69: Method performance data reported by
Page 72 and 73: Results reported by NRLs for the co
Page 74 and 75: µg/kg Distribution of individual r
Page 76 and 77: Results reported by OCLs for the co
Page 84 and 85: Results reported by OCLs for the su
Page 98 and 99: Results reported by OCLs for the fa
Page 100: As the Commission’s in-house scie
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jrc79301_report%20eu-rl%20pahs%20pt%20on%20chocolate%202012_ver11

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