305 / 620
Table 11 – Results obtained for Zn in Infant Formulas and Pediatric/Adult Nutritionals
ND = Not determined (< 8 participating labs)
4.
Conclusions:
Relative standard deviation for reproducibility (RSD
R
), recovery (compared to assigned
values) and Horrat values are in general satisfactory compared to SMPR for all elements in
all matrixes ranging between 0.016 mg/100g (Mn) and 683.2 mg/100g (K). These results
confirm data obtained during first study published in 2009 and MLT published in 2012 for
fortified food products including an infant formula with the following result displayed in
table 12 below (Reference:
J. AOAC Int
.
95
, 177(2012)):
Table 12 - Results obtained for 9 elements in Infant Formula Powder Partially Hydrolyzed
Milk Based
Based on data from MLT performed for fortified products including one infant formula and
on these current data of 6 performance tests, it is recommended that AOAC 2011.14 is fit
for purpose to analyze Calcium, Copper, Iron, Magnesium, Manganese, Potassium,
Phosphorus, Sodium, and Zinc in Infant formulae and Pediatric/Adult Nutritionals.
Sample
Element
Number
of
labs
Unit
Average
Value
(mg/100g)
RSDR
(%)
SMPR: < 10%
Recovery
(%)
SMPR:
90%-110%
Horrat
value
IF1 Zn
23
mg/100g
4.92
3.4
100.0% 0.38
IF2 Zn
23
mg/100g
3.52
4.6
99.7% 0.49
IF3 Zn
19
mg/100g
5.30
3.2
100.2% 0.37
IF4 Zn
19
mg/100g
5.20
3.8
99.8% 0.43
IF5 Zn
20
mg/100g
5.06
3.1
99.8% 0.34
IF6 Zn
20
mg/100g
5.80
4.2
99.1% 0.48
AN1 Zn
7
mg/100g
1.51
3.8
100.7% ND
AN2 Zn
7
mg/100g
2.02
3.4
101.0% ND
AN3 Zn
7
mg/100g
1.14
1.4
100.0% ND
AN4 Zn
7
mg/100g
1.48
2.7
101.4% ND
AN5 Zn
5
mg/100g
2.21
20.1
108.9% ND
AN6 Zn
5
mg/100g
1.29
1.8
99.2% ND
Sample
Element
Number
of
labs
Unit
Average
Value
(mg/100g)
RSDR
(%)
Recovery
(%)
Horrat
value
Ca
9
mg/100g 567.9
3.2%
99% 0.74
Cu
9
mg/100g 0.619
6.1%
101% 0.50
Fe
9
mg/100g
8.31
5.6%
102% 0.68
Mg
8
mg/100g 43.93
3.0%
99% 0.47
Mn
8
mg/100g 0.040
4.9%
99% 0.27
P
9
mg/100g 373.0
2.7%
100% 0.59
K
9
mg/100g
64.4
2.0%
100% 0.47
Na
9
mg/100g 176.9
1.9%
96% 0.36
Zn
9
mg/100g
5.37
4.4%
105% 0.50
2011.14 (MTE-01) - MLT-Def
FOR ERP USE ONLY
DO NOT DISTRIBUTE