SPSFAM Heavy Metals ERP Book

AOAC FIRST ACTION 2015.01

MULTI LABORATORY TEST

ERM-BD 150 Milk Powder All thirteen participating laboratories reported results for ERM-BD 150 Milk Powder including the four Heavy Metal analytes, Arsenic, Cadmium, Mercury and Lead. The raw data, precision and trueness data are shown in the tables below. Arsenic: All data reported was considered for the precision determination excluding the non-numeric LOQ results. The 9 labs used for the precision determination reported an overall mean of 8.0 which is below the SMPR requirement of 10 µg/kg. Cadmium: Lab 11 results were excluded from the precision determination for not meeting the SMPR recovery requirement of 60-115%. Lab 2 was excluded for reporting < LOQ. The 11 labs used for the precision determination reported a RSD(r) value of 10.6 and a RSD(R) value of 16.6. Both precision results meet the requirements of the SMPR. Mercury: All lab results were included in the precision determination excluding the labs reporting < LOQ. The 12 labs used for the precision determination reported a RSD(r) value of 8.68 and a RSD(R) value of 11.0. Both precision results meet the requirements of the SMPR. Lead: Lab 6, 11 and 13 results were excluded from the precision determination for not meeting the SMPR recovery requirement of 60-115%. Lab 2, 4 and 10 were excluded for reporting < LOQ. The 7 labs used for the precision determination reported a RSD(r) value of 6.7 and a RSD(R) value of 14.2. Both precision results meet the requirements of the SMPR.

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