![header thumbnail](/images/publishers\iso_cover.gif)
ISO 7954:1987
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
View Superseded by
![header thumbnail](/images/publishers\iso_cover.gif)
Microbiology General guidance for enumeration of yeasts and moulds Colony count technique at 25 degrees C
Hardcopy , PDF , PDF 3 Users , PDF 5 Users , PDF 9 Users
27-02-2019
English, French
15-10-1987
The method consists in preparing of poured plates using a specified selective culture medium and a specified quantity of a test sample, further dilutions of the test sample. Then aerobic incubation of the plates at 25 degrees centigrade for 3, 4 or 5 days, followed by calculation of the number of yeasts and moulds per gram or per millilitre of the sample from the number of colonies obtained on plates chosen at dilution levels so as to give a significant result.
Access your standards online with a subscription
Features
-
Simple online access to standards, technical information and regulations.
-
Critical updates of standards and customisable alerts and notifications.
-
Multi-user online standards collection: secure, flexible and cost effective.