AOAC 2018 Methods

B ird et al . : J ournal of AOAC I nternational V ol . 102, N o . 1, 2019  113

Table 2018.01B. ( continued )

CP a

CC b

C c

R d

C vs. R

dLPOD (C, R)

dLPOD (CP, CC)

N e X f POD

Inoculation level Statistic

Matrix

Lab

CP N X POD CC N X POD C N X POD R

0.00 0.00 0.15 0.51 0.46 0.52

0.00 0.00 0.12 0.51 0.47 0.52

0.00 0.00 0.13 0.51 0.47 0.52

0.00 0.00 0.12 0.51 0.47 0.52

s L

LCL UCL

s R

UCL LCL

P value

0.7750

0.9494

0.9462

0.9494

High

Powdered infant formula 1 12 12 1.00 12 12 1.00 12 12 1.00 12 12 1.00 0.00 0.00 2 12 12 1.00 12 12 1.00 12 12 1.00 12 12 1.00 0.00 0.00 3 12 12 1.00 12 12 1.00 12 12 1.00 12 12 1.00 0.00 0.00 4 12 12 1.00 12 12 1.00 12 12 1.00 12 12 1.00 0.00 0.00 5 12 12 1.00 12 12 1.00 12 12 1.00 12 12 1.00 0.00 0.00 6 12 12 1.00 12 12 1.00 12 12 1.00 12 12 1.00 0.00 0.00 7 12 12 1.00 12 12 1.00 12 12 1.00 12 12 1.00 0.00 0.00 8 12 12 1.00 12 12 1.00 12 12 1.00 12 12 1.00 0.00 0.00 9 12 12 1.00 12 12 1.00 12 12 1.00 12 12 1.00 0.00 0.00 10 12 12 1.00 12 12 1.00 12 12 1.00 12 12 1.00 0.00 0.00 MPN/ test portion (2.71, 1.86, 3.97) 11 12 12 1.00 12 12 1.00 12 12 1.00 12 12 1.00 0.00 0.00 12 12 12 1.00 12 12 1.00 12 12 1.00 12 12 1.00 0.00 0.00 13 12 12 1.00 12 12 1.00 12 12 1.00 12 12 1.00 0.00 0.00 14 12 12 1.00 12 12 1.00 12 12 1.00 12 12 1.00 0.00 0.00

Estimate

168 168 1.00 168 168 1.00 168 168 1.00 168 168 1.00 0.00 0.00

LCL UCL

0.98 1.00 0.00 0.00 0.15 0.00 0.00 0.15 0.00 0.00 0.21

0.98 1.00 0.00 0.00 0.15 0.00 0.00 0.15 0.00 0.00 0.21

0.98 1.00 0.00 0.00 0.15 0.00 0.00 0.15 0.00 0.00 0.21

0.98 –0.02 –0.02 1.00 0.02 0.02

0.00 0.00 0.15 0.00 0.00 0.15 0.00 0.00 0.21

s r

LCL UCL

s L

All

LCL UCL

s R

UCL LCL

P value

1.000

1.000

1.000

1.000

a  CP = Candidate presumptive. b  CC = Candidate confirmed.

c  C = Candidate result. d  R = Reference method. e  N = Number of samples tested. f  X = Number of test samples with a positive result (presumptive or confirmed).

g  LCL = Lower confidence limit. h  UCL = Upper confidence limit.