AOACSPIFANMethods-2017Awards

a  Number of laboratories submitting data (number of laboratories with data removed as outliers). b  Number of samples with results submitted (number of samples removed as outliers). c  Data reported as µg/kg powder. 14

Butler-Thompson et al.: J ournal of AOAC I nternational V ol. 98, N o. 6, 2015  1663

2 43.7 47.1 0.313 0.341 0.423 0.436 0.283 0.280 0.698 0.665 0.932 0.938 0.562 0.577 0.248 0.230 0.444 0.466 0.269 0.300 1.58 1.70 1.33 1.31 3 39.5 43.1 0.300 0.293 0.305 0.292 0.228 0.276 0.638 0.625 0.987 0.978 0.487 0.465 0.226 0.245 0.429 0.363 0.304 0.266 1.37 1.37 0.953 0.830 4 44.0 40.7 0.283 0.310 0.273 0.306 0.246 0.268 0.660 0.606 1.01 0.972 0.532 0.537 0.201 0.226 0.420 0.413 0.305 0.311 0.804 c 0.683 c 0.989 0.944 5 42.9 38.0 0.250 0.238 0.331 0.402 0.183 0.261 0.590 0.510 0.885 c 0.767 c 0.520 d 0.670 d 0.183 0.187 0.416 0.375 0.155 0.242 1.27 1.25 0.941 0.793 6 35.2 c 19.9 c NA e NA 0.305 0.312 0.173 0.155 0.627 0.570 NA NA 0.466 0.491 NA NA 0.271 c 0.345 c NA NA NA NA NA NA 7 44.8 54.9 0.304 0.250 0.395 0.355 0.236 0.234 0.671 0.609 0.950 0.899 0.584 0.633 0.248 0.243 0.436 0.420 0.225 0.252 1.33 0.872 b 0.973 0.992 8 47.8 47.6 0.379 0.376 0.431 0.430 0.344 0.305 0.661 0.650 0.957 0.991 0.635 0.657 0.230 0.218 0.475 0.441 0.300 0.286 1.63 1.34 1.36 1.32 9 40.5 39.9 0.257 0.271 0.300 0.319 0.241 0.242 0.584 0.549 1.03 0.959 0.501 0.477 0.250 0.236 0.409 0.402 0.229 0.241 1.44 0.929 b 1.13 0.893 10 42.6 40.2 0.363 0.279 0.471 0.487 0.317 0.284 0.686 0.757 0.965 1.01 0.564 0.556 0.330 f 0.270 f 0.469 0.477 0.296 0.327 1.79 1.57 1.33 1.26 11 43.3 45.0 0.267 0.319 0.463 0.456 NA NA NA NA NA NA NA NA 0.244 0.221 0.438 0.421 NA NA 1.59 0.932 b 0.938 1.01 a  Concentration in g/100 µg RTF liquid for all products except NIST 1849a; NIST 1849a concentration in µg/kg powder. b  Data excluded. Sample was mislabeled. Sample is really adult high-protein RTF liquid. c  Data excluded. Failed single Grubbs’ test. d  Data excluded. Failed Cochran’s test. e  NA = Not applicable. Laboratory did not receive sample. f  Data excluded. Failed double Grubbs’ test. Table 2. Multilaboratory collaborative study results for vitamin B 12 Sample type Total No. labs a Total No. replicates b Mean, µg/100 g RTF SD r SD R RSD r , % RSD R , % HorRat Infant formula (NIST SRM 1849a) 11 (1) 22 (2) 43.70 c 3.010 3.86 6.90 8.84 0.34 Infant formula powder soy-based 11 (1) 22 (2) 0.428 0.021 0.0305 4.85 7.13 0.20 Infant formula powder milk-based 10 (1) 20 (2) 0.227 0.011 0.0202 4.90 8.90 0.22 Infant formula RTF milk-based 9 (0) 18 (0) 0.272 0.026 0.0427 9.46 15.70 0.40 Infant formula powder partial hydrolyzed milk-based 11 (0) 22 (0) 0.373 0.020 0.0694 5.35 18.60 0.50 Infant formula powder partial hydrolyzed soy-based 10 (0) 20 (0) 0.250 0.024 0.0487 9.77 19.50 0.50 Adult nutritional powder milk-based 10 (0) 20 (0) 0.300 0.027 0.0416 8.99 13.80 0.36 Adult nutritional RTF high protein 10 (0) 20 (0) 1.080 0.073 0.1900 6.74 17.50 0.55 Child formula powder 9 (1) 18 (2) 0.967 0.029 0.0342 2.98 3.54 0.11 Adult nutritional RTF high fat 10 (1) 16 (2) 1.480 0.122 0.1710 8.23 11.50 0.38 Infant elemental powder 10 (1) 20 (2) 0.543 0.017 0.0603 3.11 11.10 0.32 Adult nutritional powder low fat 10 (0) 20 (0) 0.636 0.035 0.0587 5.47 9.23 0.27

Adult high-

Table 1. Multilaboratory collaborative study data for vitamin B 12 a Lab No. NIST 1849a Adult milk powder Infant partially hydrolyzed milk powder Infant partially hydrolyzed soy powder protein RTF 1 42.1 45.4 0.306 0.308 0.360 0.359 0.212 0.222 0.687 0.680 0.934 0.963 0.532 0.516 0.227 0.230 0.415 0.431 0.290 0.295 1.53 1.19 b 0.19 0.17 Adult low-fat powder Child powder Infant elemental powdered Infant milk powder Infant soy powder Infant milk RTF Adult high-fat RTF