3/7/2013
9
Minimum of 10 artificially inoculated samples
Use CRM, if available
For Qualitative methods inoculate with 1-5 CFU
per test portion.
For Quantitative methods, the levels of
contamination shall cover the range of the
method
Analyse samples on 10 different occasions or
days
be performed by at least 2 technicians
working independently and with separate
samples and reagents
.
◦
For Qualitative Methods, artificially inoculate 10
samples at around 10-25 CFU per analytical unit
+ 5 uninoculated controls
◦
For Quantitative Methods using selective medium,
measure repeatability by analyzing 10 replicate
samples of a representative food matrix naturally
or artificially contaminated
1...,52,53,54,55,56,57,58,59,60,61 63,64,65,66,67,68,69,70,71,72,...178