Draft
International Standard
ISO/DIS 7899-3
Water quality — Enumeration of intestinal enterococci — Part 3: Most probable number method
Reference number
ISO/DIS 7899-3
Edition 1
Proyecto Norma internacional
Preview
ISO/DIS 7899-3
85093
No disponible en español
Este borrador de Norma Internacional se encuentra en la fase de consultas con los miembros de ISO.

ISO/DIS 7899-3

ISO/DIS 7899-3
85093
Idioma
Formato
CHF 63
Convertir Franco suizo (CHF) a tu moneda

Resumen

This document specifies a method for the enumeration of intestinal enterococci in water. The method is based on the growth of target organisms in a liquid medium and calculation of the “Most Probable Number” (MPN) of microorganisms by reference to MPN tables or using informatic programs. The test described in this document relies upon the detection of intestinal enterococci based upon expression of the enzyme ß-D-glucosidase. This method provides a confirmed result in 24 h with no requirement for confirmation of positive wells. This method can be applied to a range of types of water (for example, drinking water, bathing water, groundwater, surface water and wastewater), including those containing an appreciable amount of suspended matter and high background counts of heterotrophic bacteria. For marine waters, enterococci are best enumerated using diluted samples.

Informaciones generales

  •  : En desarrollo
    : Cierre de la votación [40.60]
  •  : 1
     : 11
  • ISO/TC 147/SC 4
    07.100.20 
  • RSS actualizaciones

¿Tiene alguna duda?

Consulte nuestras Ayuda y asistencia