6. AOACSPIFANMethods-2018Awards

39

150 L in et al .: J ournal of AOAC I nternational V ol . 100, N o . 1, 2017

Table 3. Precision

Concn level, μg/100 g reconstituted

SPIFAN code No. replicates a

, % b

Product

, % RSD iR

RSD r

NA c

Child Formula Powder, placebo Infant Elemental Powder, placebo

00847RF00 00796RF00 00821RF00 00820RF00

6 6 6 6 6

Not detected Not detected Not detected Not detected Not detected

NA NA NA NA NA 2.6 1.6 1.3 4.5 3.3 2.8 1.8 4.5 4.1 3.0 4.0 4.1 3.4 3.1

NA NA NA NA 1.5 0.5 0.5 1.9 2.5 0.7 1.2 1.9 2.6 1.2 3.0 1.7 1.0 0.6

Adult Nutritional RTF, High-Protein, placebo Adult Nutritional RTF, High-Fat, placebo Infant Formula RTF, Milk-Based, placebo

EV4H2Q CLC10-b

22.4 d 4.07 4.43 10.7 2.90 31.9 21.6 10.7 1.66 5.11 5.15 3.86 56.8 76.2

SRM 1849a

12 12 12 12 12 12 12 12 12 12 12 12 12 12

Infant Formula Powder, Partially Hydrolyzed Milk-Based 410057652Z Infant Formula Powder, Partially Hydrolyzed Soy-Based 410457651Z

Toddler Formula Powder, Milk-Based Infant Formula Powder, Milk-Based Adult Nutritional Powder, Low-Fat

4052755861 4044755861 00859RF00 00866RF00 00795RF00 50350017W1

Child Formula Powder Infant Elemental Powder

Infant Formula Powder, FOS/GOS-Based e

Infant Formula Powder, Milk-Based Infant Formula Powder, Soy-Based Infant Formula RTF, Milk-Based Adult Nutritional RTF, High-Protein Adult Nutritional RTF, High-Fat

K16NTAV E10NWZC

EV4H2R

00730RF00 00729RF00

a  Duplicates on 3 or 6 days. b  RSD iR = Intermediate RSD R . c  NA = Not applicable. d  Reference value taken from the Certificate of Analysis of SRM 1849a. e  FOS/GOS = Fructo-oligosaccharide/galacto-oligosaccharide.

Table 4. Accuracy: spike recovery

Spike recovery

Level 2 (~150% for placebo, ~100% for fortified)

Native level, μg/100 g reconstituted Not detected

Level 1 (~50%)

Product

SPIFAN code No. replicates

Avg., % ( n = 3)

RSD, % Avg., % ( n = 3)

RSD, %

Child Formula Powder, placebo Adult Nutritional RTF, High-Protein, placebo Adult Nutritional RTF, High-Fat, placebo Infant Formula Powder, Partially Hydrolyzed Soy-Based

00847RF00

6

103

3.2

105

1.5

00821RF00

6

Not detected

102

1.6

103

1.5

00820RF00

6

Not detected

102

2.2

104

1.7

410457651Z

6

4.43

105

4.2

101

4.2

00859RF00

6

31.9

111

2.9

102

1.8

Adult Nutritional Powder, Low-Fat

Child Formula Powder

00866RF00 00795RF00

6 6

21.6 10.7

109 106

2.8 2.8

104 95.1

1.7 3.0

Infant Elemental Powder

50350017W1

6

1.66

105

6.4

99.9

7.2

Infant Formula Powder, FOS/GOS-Based a Infant Formula Powder, Milk-Based Adult Nutritional RTF, High-Protein Adult Nutritional RTF, High-Fat

K16NTAV

6

5.11

104

6.1

103

4.6

00730RF00

6

56.8

109

1.6

102

0.8

00729RF00

6

76.2

109

2.4

101

0.7

a  FOS/GOS = Fructo-oligosaccharide/galacto-oligosaccharide.