Which Preservative Efficacy Test (PET) do I need?

If you are not sure which microbial challenge test (PET test) you need then find out more here.
EP USP ISO
UK
EU
USA
World

EP, USP or ISO standard PET test?

Customer demand

Alternative methods

EP USP ISO
Incubation (days) 28 28 28
Sample required (g) 250 250 250
Total Species 4/5 5 5
Staphylococcus aureus
Pseudomonas aeruginosa
Candida albicans
Aspergillus brasiliensis
Escherichia coli

PET test details

Customised tests