TRRTP178 - Uredba o upravljanju kakovosti kopalnih voda

ISO/IEC 17025:2017 specifies the general requirements for the competence, impartiality and consistent operation of laboratories.
ISO/IEC 17025:2017 is applicable to all organizations performing laboratory activities, regardless of the number of personnel.
Laboratory customers, regulatory authorities, organizations and schemes using peer-assessment, accreditation bodies, and others use ISO/IEC 17025:2017 in confirming or recognizing the competence of laboratories.

This part of ISO 9308 specifies a method for the enumeration of Escherichia coli (E. coli) and coliform
bacteria. The method is based on membrane filtration, subsequent culture on a chromogenic coliform
agar medium, and calculation of the number of target organisms in the sample. Due to the low selectivity
of the differential agar medium, background growth can interfere with the reliable enumeration of
E. coli and coliform bacteria, for example, in surface waters or shallow well waters. This method is not
suitable for these types of water.
This part of ISO 9308 is especially suitable for waters with low bacterial numbers that will cause less
than 100 total colonies on chromogenic coliform agar (CCA). These may be drinking water, disinfected
pool water, or finished water from drinking water treatment plants.
Some strains of E. coli which are β-D-glucuronidase negative, such as Escherichia coli O157, will not be
detected as E. coli. As they are β-D-galactosidase positive, they will appear as coliform bacteria on this
chromogenic agar.

Migrated from Progress Sheet (TC Comment) (2000-07-10): TC 230 Res. 87: // approval procedure on the revision of ISO 7899-2:1984. ++ N315: New TD (TA/980915)

ISO - Taking over of an ISO Technical Corrigendum

ISO - Taking over of an ISO Technical Corrigendum

Migrated from Progress Sheet (TC Comment) (2000-07-10): N315: New TD (TA/980915)