6. AOACSPIFANMethods-2018Awards

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Butler-Thompson et al. : J ournal of AOAC I nternational V ol. 98, N o. 6, 2015  1673

Figure 2011.18C. Typical standard chromatogram.

Figure 2011.18D. Typical sample chromatogram.

Table 1. Multilaboratory collaborative study data for free myo-inositol a

Infant partially hydrolyzed milk powder

Infant partially hydrolyzed soy powder

Infant elemental powder

Infant milk powder

Infant soy powder

Infant milk RTF

Infant milk RTF, unfortified

Lab No. NIST 1849a

Child powder

1 2 3 4 5 6 7 8

416 415 3.76 408 417 2.76 b 404 422 3.60 404 421 3.78 414 408 3.83 411 412 3.86 406 410 3.90 412 420 3.93 430 435 3.91 378 420 3.80 404 403 2.96 b

3.83 3.33 3.25 5.13 5.11 5.21 5.28 4.26 4.30 4.34 4.30 7.13 7.16 3.23 3.19

2.76 b

2.64 2.46 5.62 c

5.67 c

5.16 4.99 4.74 c 4.76 c 4.04 4.10 7.07 7.12 3.26 3.16

3.72 3.00 2.81 4.96 4.97 5.16 4.95 4.22 4.21 3.65 4.03 7.09 7.08 3.06 3.05 3.78 3.23 3.23 5.08 5.10 5.34 5.30 4.41 4.26 4.49 4.27 7.46 7.53 3.10 3.16 3.85 3.24 3.17 5.14 5.13 4.31 d 5.33 d 4.19 4.17 4.40 4.31 NA e NA NA NA 3.90 3.57 3.50 5.22 5.26 5.37 5.32 4.38 4.39 4.60 4.66 7.31 7.34 3.26 3.35 3.94 3.47 3.50 5.00 5.02 5.53 5.29 4.06 4.11 4.44 4.43 7.40 7.34 3.16 3.19 3.87 3.27 3.36 4.96 4.92 5.23 5.12 4.24 4.10 4.23 4.32 7.25 7.18 3.16 3.21

3.92 3.48 3.45 4.92 4.91 5.23 5.29 NT f

NT 4.41 4.44 7.22 7.10 3.20 3.22

3.81 2.84 2.80 5.53 4.63 4.96 4.85 4.41 d 3.71 d 4.17 3.82 7.11 d 6.71 d 2.94 3.13

9

2.91 b

2.54 2.31 4.97 d

5.03 d

4.58 4.44 4.24 4.10 3.67 3.66 6.87 6.9 3.14 3.24

10

a  Concentration in mg/100 g RTF liquid for all products except NIST 1849a. NIST 1849a concentration in mg/kg powder. b  Data excluded. Failed Double Grubbs’ test. c  Data excluded. Failed Single Grubbs’ test. d  Data excluded. Failed Cochran’s test.

e  NA = Not applicable. Laboratory did not receive sample. f  NT = Not tested. Laboratory did not complete testing.