Biosisto has for the process control of ISO 4833 (1 and 2) four different Certified Reference Materials available, each with its own characteristics.
What you choose depends on what the requirement of your laboratory is.
The differences are schematically shown in the table below.
|Single or multi-strain CRM||Accreditated||Metrological Traceability of||Media Performance testing|
|CRM-SA||Single||Yes||Strain & Property value||Yes|
|CRM-CC||Multi of 3 strains|
only suitable for total count analysis
1 check instead of
3 different checks