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: J
ournal of
AOAC I
nternational
V
ol.
98, N
o.
6, 2015
1673
Figure 2011.18D. Typical sample chromatogram.
Table 1. Multilaboratory collaborative study data for free myo-inositol
a
Lab No. NIST 1849a
Infant partially
hydrolyzed milk
powder
Infant partially
hydrolyzed soy
powder
Child powder
Infant elemental
powder
Infant milk
powder
Infant soy
powder
Infant milk
RTF
Infant milk RTF,
unfortified
1
416 415 3.76
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
408 417 2.76
b
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
404 422 3.60
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
4
404 421 3.78
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
5
414 408 3.83
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
6
411 412 3.86
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
7
406 410 3.90
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
8
412 420 3.93
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
430 435 3.91
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
9
378 420 3.80
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
10
404 403 2.96
b
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
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.
Figure 2011.18C. Typical standard chromatogram.
15