ISO 4831:1991
Microbiology; general guidance for the enumeration of coliforms; most probable number technique
- Standard No.
- ISO 4831:1991
- Release Date
- 1991
- Published By
- International Organization for Standardization (ISO)
- Status
- Replace By
- ISO 4831:2006
- Latest
- ISO 4831:2006
- Scope
- This second edition cancels and replaces the first edition (ISO 4831:1978). It is intended to provide general guidance for the examination of products not dealt with by existing International Standards. These guidelines may not be appropriate for some products in every detail, and for some other products it may be necessary to use different methods. The technique described here is less precise than that described in ISO 4832. Gives references, and the definition of the term coliforms. Specifies principle, culture media and dilution fluid, apparatus and glassware, sampling, preparation of the test sample, procedure, expression of results and test report.
ISO 4831:1991 history
- 2006 ISO 4831:2006 Microbiology of food and animal feeding stuffs - Horizontal method for the detection and enumeration of coliforms - Most probable number technique
- 1991 ISO 4831:1991 Microbiology; general guidance for the enumeration of coliforms; most probable number technique
- 1978 ISO 4831:1978 Microbiology — General guidance for the enumeration of coliforms — Most probable number technique at 30 degrees C
