AOAC Final Action Methods in 2017

546 P ACQUETTE & T HOMPSON : J OURNAL OF AOAC I NTERNATIONAL V OL . 101, N O . 2, 2018

Parameter 1 a 2 b 3 c 4 d 5 e 6 f 7 g 8 h 9 i 10 j 11 k 12 l 13 m 14 n 15 o 16 p 17 q 18 r Year of interlab test 2016 2016 2016 2016 2016 2016 2016 2016 2016 2016 2016 2016 2016 2016 2016 2016 2016 2016 No of labs submitting results 10 10 10 10 10 9 10 8 10 10 10 10 10 10 10 10 10 10 No. of outliers (individual replicates) 1 0 0 0 0 2 0 0 1 0 0 0 0 0 0 0 0 0 No. of accepted results 19 20 20 20 20 16 20 16 19 20 20 20 20 20 20 20 20 20 Phosphorus

Overall mean of all data (grand mean) t 29.8 90.2 70.2 95.3 40.8 23.9 44.2 22.8 51.8 47.9 26.3 41.4 23.7 33.5 49.8 29.6 24.7 49.3 S r 0.59 2.85 2.24 3.45 1.29 0.41 0.41 0.47 0.74 0.74 0.44 0.84 0.33 0.42 1.08 0.38 0.44 0.40 S R 1.34 9.73 4.40 6.60 1.86 1.19 1.23 1.14 2.15 1.41 1.15 1.33 1.19 0.89 2.18 1.10 1.15 1.04 RSD r 2.0 3.2 3.2 3.6 3.2 1.7 0.9 2.1 1.4 1.6 1.7 2.0 1.4 1.3 2.2 1.3 1.8 0.8 RSD R 4.5 10.8 s 6.3 6.9 4.6 5.0 2.8 5.0 4.2 2.9 4.4 3.2 5.0 2.7 4.4 3.7 4.7 2.1 Repeatability limit r (r = 2.8 × s r ) 1.65 7.98 6.27 9.66 3.61 1.14 1.15 1.33 2.07 2.08 1.23 2.35 0.92 1.17 3.03 1.05 1.24 1.13 Reproducibility limit R (R = 2.8 × s R ) 3.75 27.25 12.32 18.49 5.21 3.32 3.44 3.19 6.03 3.94 3.23 3.73 3.33 2.50 6.11 3.07 3.22 2.91 HorRat value 0.66 1.88 1.05 1.22 0.70 0.71 0.43 0.71 0.67 0.47 0.63 0.50 0.71 0.40 0.70 0.55 0.67 0.34 Repeatability limit SMPR 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 Reproducibility limit SMPR 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 Zinc Year of interlab test 2016 2016 2016 2016 2016 2016 2016 2016 2016 2016 2016 2016 2016 2016 2016 2016 2016 2016 No. of labs submitting results 10 9 9 10 10 10 10 8 10 10 10 10 10 10 10 10 10 10 No. of outliers (individual replicates) 0 2 2 0 0 0 0 4 0 0 1 0 0 1 0 0 1 0 No. of accepted results 20 16 16 20 20 20 20 12 20 20 19 20 20 19 20 20 19 20

Overall mean of all data (grand mean) t 0.719 2.60 0.453 2.21 0.298 0.159 0.728 0.546 0.732 0.0058 0.540 0.559 0.603 0.560 0.828 0.717 0.0895 0.327 S r 0.0156 0.0439 0.0106 0.0712 0.0074 0.0032 0.0058 0.0060 0.0104 0.0023 0.0067 0.0070 0.0093 0.0062 0.0070 0.0074 0.0018 0.0017 S R 0.0313 0.1154 0.0142 0.1127 0.0124 0.0055 0.0337 0.0237 0.0274 0.0034 0.0310 0.0260 0.0260 0.0211 0.0359 0.0184 0.0047 0.0157 RSD r 2.2 1.7 2.4 3.2 2.5 2.0 0.8 1.1 1.4 39.0 s 1.2 1.3 1.6 1.1 0.9 1.0 2.0 0.5 RSD R 4.4 4.4 3.1 5.1 4.2 3.5 4.6 4.3 3.7 58.0 s 5.7 4.7 4.3 3.8 4.3 2.6 5.3 4.8 Repeatability limit r (r = 2.8 × s r ) 0.0437 0.1230 0.0298 0.1993 0.0207 0.0091 0.0161 0.0168 0.0291 0.0063 0.0187 0.0196 0.0262 0.0172 0.0197 0.0207 0.0050 0.0047 Reproducibility limit R (R = 2.8 × s R ) 0.0876 0.3232 0.0397 0.3156 0.0348 0.0154 0.0944 0.0663 0.0767 0.0094 0.0868 0.0729 0.0729 0.0590 0.1006 0.0514 0.0132 0.0439 HorRat value 0.37 0.45 0.25 0.51 0.31 0.23 0.39 0.35 0.32 2.35 0.46 0.38 0.35 0.30 0.37 0.22 0.32 0.36 Repeatability limit SMPR 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 Reproducibility limit SMPR 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 Chromium Year of interlab test 2016 2016 2016 2016 2016 2016 2016 2016 2016 2016 2016 2016 2016 2016 2016 2016 2016 2016 No. of labs submitting results 6 8 8 8 7 8 7 7 7 8 8 8 8 8 8 8 7 7 No. of outliers (individual replicates) 4 0 1 0 2 1 2 2 3 0 0 0 0 0 0 0 2 2 No. of accepted results 8 16 15 16 12 15 12 12 11 16 16 16 16 16 16 16 12 12 Downloaded from https://academic.oup.com/jaoac/article-abstract/101/2/536/5653941 by guest on 05 May 2020

Sample

Table 3. ( continued )