Norm

NEN-ISO 11866-1:2005 en

Melk en melkproducten - Telling van het aantal vermoedelijke Escherichia coli - Deel 1: Bepaling van het meest waarschijnlijke aantal (MPN) met behulp van 4-methylumbelliferyl-beta-D-glucuronide (MUG)

48,19

Over deze norm

Status Definitief
Aantal pagina's 11
Commissie Melk en zuivelproducten
Gepubliceerd op 01-12-2005
Taal Engels
This part of ISO 11866-IDF 170 specifies a combined method for the enumeration of presumptive Escherichia coli and of presumptive coliforms by means of a culture technique involving a liquid medium with MUG, and calculation of the number of presumptive Escherichia coli and/or coliforms per gram or per millilitre by the most probable number (MPN) technique after incubation at 30 °C. It is a more rapid method than that described in ISO 7251 as the incubation time is reduced (omission of several enrichment steps). The method is applicable to - milk, liquid milk products, - dried milk, dried sweet whey, dried buttermilk, lactose, - acid casein, lactic casein and rennet casein, - caseinate and dried acid whey, - cheese and processed cheese, - butter, - frozen milk products (including edible ices), and - custard, desserts and cream. The method specified in this part of ISO 11866-IDF 170 is preferred for samples in which comparatively low numbers of presumptive Escherichia coli and/or other presumptive coliforms (less than 100 per gram or 10 per millilitre) are suspected.

Details

ICS-code 07.100.30
67.100.01
Nederlandse titel Melk en melkproducten - Telling van het aantal vermoedelijke Escherichia coli - Deel 1: Bepaling van het meest waarschijnlijke aantal (MPN) met behulp van 4-methylumbelliferyl-beta-D-glucuronide (MUG)
Engelse titel Milk and milk products - Enumeration of presumptive Escherichia coli - Part 1: Most probable number technique using 4-methylumbelliferyl-beta-D-glucuronide (MUG)
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