AOAC 2018 Methods

Table 2018.05. Interlaboratory Study Results of Peel Plate EB vs. ISO 21528-1 & ISO 21528-2 Peel Plate EB ISO 21528-1 & ISO 21528-2 Difference of Means d b R c Lot N s r s R s r s

Difference of Means e 95% LCL, UCL

Mean Log 10 CFU/g

Mean Log 10 CFU/g

N a

Matrix

Lot

Uninoculat ed

1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1

Uninoculat ed

1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1

<0.1

na f

na

<0.1

na

na

na

na, na

Infant Formula with

0.4 5 0.2 6 0.1 8 0.4 5 0.2 5 0.1 7 na

0.1 8 0.2 7 0.1 0 0.1 8 0.2 7 0.1 0 na f

Low

0.89

0.33

Low

1.05

0.39

-0.16

-0.31, -0.01

Probiotics 24 h result

Medium

2.46

0.20

Medium

2.31

0.27

0.15

0.05, 0.25

High

3.39

0.12

High

3.21

0.20

0.18

0.11, 0.25

Uninoculat ed

Uninoculat ed

<0.1

na f

<0.1

na

na

na, na

Infant Formula with

Low

0.90

0.34

Low

1.05

0.39

-0.15

-0.31, 0.1

Probiotics 48 h result

Medium

2.47

0.25

Medium

2.31

0.27

0.16

0.06, 0.26

High

3.39

0.11

High

3.21

0.20

0.18

0.12, 0.25

a Number of collaborators that reported complete results. b s r – Repeatability. c s R – Reproducibility. d dThe difference of the means should between -0.5 and +0.5 log10 cfu/g(mL) e 95% Lower and Upper Confidence Limits. f Not applicable

6