6. AOACSPIFANMethods-2018Awards

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Jaudzems: J ournal of AOAC I nternational V ol. 98, N o. 5, 2015  1391

Table 2015.08A. Precision of results expressed on reconstituted product Matrix a

, % b

, % c

Chloride mean, mg/100 g

RSD r

RSD R

NIST SRM 1849a

68.5 46.1 36.8 38.2 30.8 20.0 36.4 42.4 46.2 40.3 38.6 39.3 46.5 56.1 44.2

0.42 0.26 0.10 0.64 2.77 0.22 0.45 0.09 0.15 0.20 0.67 0.21 0.88 0.29 0.34 0.44 1.01

1.59 0.32 0.12 2.76 0.18 0.47 0.13 0.16 0.18 0.81 0.23 0.85 0.33 0.24 0.40

Child formula powder Infant elemental powder

Adult nutritional RTF, high protein Adult nutritional RTF, high fat

10.09 d

Infant formula RTF, milk based (SPIFAN blank milk formula)

Adult nutritional powder milk, protein based

Infant formula powder partially hydrolyzed, milk based Infant formula powder partially hydrolyzed, soy based

Adult nutritional powder low fat

Child formula powder Infant elemental powder

Infant formula powder, milk based Infant formula powder, soy based

Infant formula RTF, milk based (SPIFAN control milk formula)

Adult nutritional RTF, high protein Adult nutritional RTF, high fat

154.5 162.2

0.78 a  Samples provided in the SPIFAN I Test Kit. SRM 1849a was reconstituted 10 g to 100 g, and all other powders were reconstituted 25 g to 225 g. b  RSD r = Repeatability RSD. c  RSD R = Reproducibility RSD. d  Higher repeatability and intermediate reproducibility were observed in this nonfortified RTF sample compared to the rest of the samples. This is most likely due to sample heterogeneity, since the sample was beyond its expiration date. The sample contents separated even after 15 min shaking prior to opening. These results were not included in the evaluation. Additional high-fat sample was within the SMPR requirements.

Table 2015.08B. Recovery results of spiking experiments for chloride

+ 50% of native value

+ 100% of native value

Matrix

Native chloride, mg/100 g Average, % RSD, % Average, % RSD, %

SRM NIST 1849a

68.5 46.1 36.8 20.0 36.4 42.4 46.2 40.3 38.6 39.3 46.5 56.1 44.2

104.0 102.0 101.0 103.0 101.0 101.0 102.0 102.0 101.0 100.0 100.0 101.0 103.0 101.0 102.0

2.8 2.1 1.5 1.2 1.2 1.0 1.4 1.6 1.5 1.9 0.5 1.2 3.2 0.2 1.6

103.0 100.0 101.0 101.0 100.0 100.0 100.0 101.0 100.0 101.0 100.0 100.0

1.3 1.5 1.5 1.1 0.7 1.8 1.5 1.8 1.3 1.2 0.9 0.4 1.0 0.5 1.9

Child formula powder Infant elemental powder

Infant formula RTF, milk based (SPIFAN blank milk formula)

Adult nutritional powder, milk protein based

Infant formula powder partially hydrolyzed, milk based Infant formula powder partially hydrolyzed, soy based

Adult nutritional powder low fat

Child formula powder Infant elemental powder

Infant formula powder, milk based Infant formula powder, soy based

Infant formula RTF, milk based (SPIFAN control milk formula)

99.0

Adult nutritional RTF, high protein Adult nutritional RTF, high fat

154.5 162.2

100.0 103.0