AOACSPIFANMethods-2017Awards

153

Butler-Thompson et al. : J ournal of AOAC I nternational V ol. 98, N o. 6, 2015  1675

Table 4. Collaborative study results for free myo-inositol with outliers removed

Mean, mg/100 g RTF

Total No. labs a

Total No. replicates b

Sample type

SD R 11.4

RSD r

, % RSD R

, % HorRat

SD r 11.3

412 c 4.22 4.23 7.20 3.83 3.11 5.05 5.13 3.17

Infant formula (NIST SRM 1849a) Infant formula powder soy-based Infant formula powder milk-based Infant formula RTF milk-based

10 (0) 10 (0) 10 (2)

22 (0) 22 (0) 20 (4) 20 (2) 22 (4) 22 (0) 22 (4) 22 (2) 20 (0)

2.75 3.03 1.56 0.63 0.96 2.92 0.46 1.85 1.84

2.77 7.26 2.57 2.57 2.33 12.6 2.15 5.41 2.87

0.43 0.80 0.28 0.31 0.25 1.32 0.24 0.61 0.30

0.127 0.305 0.066 0.109 0.046 0.185 0.037 0.089 0.090 0.389 0.023 0.109 0.095 0.277 0.058 0.091

9 (1)

Infant formula powder partial hydrolyzed milk-based 10 (2) Infant formula powder partial hydrolyzed soy-based 10 (0)

Child formula powder Infant elemental powder

10 (2) 10 (1)

Infant formula RTF milk-based, unfortified

9 (0)

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 mg/kg powder.

Table 5. Collaborative study results for phosphatidylinositol bound myo-Inositol with outliers removed

Mean, mg/100 g RTF

Total No. labs a

Total No. replicates b

Sample type

SD R 2.37

RSD r

, % RSD R

, % HorRat

SD r

9.26 c 2.10 0.667 0.348 0.214

Infant formula (NIST SRM 1849a) Infant formula powder soy-based Infant formula powder milk-based Infant formula RTF milk-based

9 (1) 9 (0) 9 (0) 8 (0)

20 (2) 20 (0) 18 (0) 18 (0) 20 (0) 20 (0) 20 (0) 20 (0) 20 (0)

1.08

11.3 6.94 3.92 8.36 4.72 5.53 6.89

25.0 23.2 25.9 25.2 26.4 21.1 25.8

2.19 2.30 2.15 1.91 1.86 2.02 1.94

0.150 0.026 0.030 0.010 0.094 0.023

0.501 0.172 0.091 0.058 0.358 0.088

Infant formula powder partial hydrolyzed milk-based 9 (0) Infant formula powder partial hydrolyzed soy-based 9 (0)

1.64

Child formula powder Infant elemental powder

9 (0) 9 (0) 8 (0)

0.328

0

0

0

0

0

0

Infant formula RTF milk-based, unfortified

0.305

0.024

0.085

7.71

26.9

2.00

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 mg/kg powder.

Table 6. Collaborative study results for free plus phosphatidylinositol bound myo-inositol with outliers removed

Mean, mg/100 g RTF

Total No. labs a

Total No. replicates b

Sample type

SD R 11.9

RSD r

, % RSD R

, % HorRat

SD r 11.9

422 c 6.27 4.94 7.53 4.04 4.71 5.42 5.11 3.46

Infant formula (NIST SRM 1849a) Infant formula powder soy-based Infant formula powder milk-based Infant formula RTF milk-based

9 (0) 9 (0) 9 (1) 8 (1)

20 (0) 20 (0) 18 (2) 18 (2) 20 (4) 20 (0) 20 (2) 20 (2) 18 (0)

2.83 2.32 1.41 0.78 0.94 3.22 0.51 1.94 1.90

2.83 7.05 6.12 2.66 3.07 7.55 5.23 5.56 3.70

0.44 0.82 0.69 0.32 0.33 0.84 0.60 0.63 0.39

0.147 0.070 0.059 0.038 0.152 0.028 0.099 0.066

0.446 0.302 0.201 0.124 0.357 0.285 0.283 0.128

Infant formula powder partial hydrolyzed milk-based 9 (2) Infant formula powder partial hydrolyzed soy-based 9 (0)

Child formula powder Infant elemental powder

9 (1) 9 (1) 8 (0)

Infant formula RTF milk-based, unfortified

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 mg/kg powder.