AOAC SPIFAN Nutrients ERP-Final Review (Oct. 2018) Pubs

2011.06 (September 2017)-Fol-22 MLT Report

FOR ERP USE ONLY DO NOT DISTRIBUTE

Samples ECHL425/UOPM297

0.0 150.0 300.0 450.0 600.0

Folate µg/100g

0

1

2

3

4

5

6

7

8

9

10 11 12

Lab Number

Figure 10: Raw data plot of Infant elemental powder

Samples DYLB360/ZMQM883

0.0 30.0 60.0 90.0 120.0

Folate µg/100g

0

1

2

3

4

5

6

7

8

9

10 11 12

Lab Number

Figure 11: Raw data plot of Adult nutritional ready to feed – high fat - Liquid

4.3 - Method Precision : The submitted data were statistically analyzed using the AOAC protocols for overall mean, intra- laboratory repeatability (S r ), repeatability relative standard deviation (RSD r ), inter-laboratory reproducibility (S R ), reproducibility relative standard deviation (RSD R ), and HorRat (1). Cochran (p= 0.025. 1-tail) Grubbs (single and double, p = 0.025, 2-tail) tests were utilized to determine outliers (2,3). The statistical analysis of results submitted by participants is given in Table 4. Only two sets of outliers one (KDOX966/ATAN351) from lab 7 and other (TJHR217/OACN211) from lab 8 were excluded as Cochran outlier, no other outliers were identified and all other results were used in the generation of precision values.

Collaborative Study Report: Method AOAC 2011.06 (Folate by LC-MS/MS) 13