NF EN ISO 781999-1 : 1999

Foreword
Introduction
1. Scope
2. Normative references
3. Definitions
4. Principle
5. Apparatus
6. Sampling
7. Culture media and diluents
8. Procedure
9. Expression of results
10. Test report
11. Performance data
Annex A (informative) Example of software for statistical
         analysis of MPNs
Annex B (informative) Example of software for computation
        of MPNs
Annex C (informative) Synthetic sea salt
Annex D (informative) Performance characteristics of the
        method
Annex E (normative) Quality criteria for manufacturing of
        the medium in microtitre plates
Annex F (normative) Preparation of calibration microtitre
         plates
Annex G (informative) Bibliography
Annex ZA (normative) Normative references to international
         publications with their relevant European
         publications

Defines a miniaturized procedure for detecting and enumerating major intestinal enterococci in surface and waste water by inoculation in a liquid medium. Applies to all kinds of surface and waste waters, especially those rich in suspended matter. Not intended for drinking water and other kind of water where the guideline count is under 15 per 100 ml.