Dear Customer

Our Customer Service will be available again as of 2 January 2025

Please note that new registrations and requests to be processed manually will only be processed from this point onwards.

You can of course place orders and receive downloads online at any time.

We wish you happy holidays, a peaceful time and a healthy New Year!

Your DIN Media

Standards Worldwide
Standards Worldwide
Phone +49 30 58885700-07

Standard [WITHDRAWN]

DIN EN ISO 9308-1:2014-12

Water quality - Enumeration of Escherichia coli and coliform bacteria - Part 1: Membrane filtration method for waters with low bacterial background flora (ISO 9308-1:2014); German version EN ISO 9308-1:2014

German title
Wasserbeschaffenheit - Zählung von Escherichia coli und coliformen Bakterien - Teil 1: Membranfiltrationsverfahren für Wässer mit niedriger Begleitflora (ISO 9308-1:2014); Deutsche Fassung EN ISO 9308-1:2014
Publication date
2014-12
Original language
German
Pages
17

from 77.90 EUR VAT included

from 72.80 EUR VAT excluded

Format and language options

PDF download 1
  • 77.90 EUR

  • 97.50 EUR

Shipment (3-5 working days) 1
  • 94.00 EUR

  • 117.80 EUR

Monitor with the Standards Ticker

1

 Attention: Document withdrawn!

Easily subscribe: Save time and money now!

You can also subscribe to this document - together with other important standards in your industry. This makes your work easier and pays for itself after a short time.

Sparschwein_data
Subscription advantages
Sparschwein Vorteil 1_data

Important standards for your industry, regularly updated

Sparschwein Vorteil 2_data

Much cheaper than buying individually

Sparschwein Vorteil 3_data

Useful functions: Filters, version comparison and more

Publication date
2014-12
Original language
German
Pages
17

Quick delivery via download or delivery service

Buy securely with a credit card or pay upon receipt of invoice

All transactions are encrypted

Overview

This standard 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 standard is especially suitable for waters with low bacterial numbers that will cause less than 100 total colonies on chromogenic coliform agar. 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. The presence and extent of faecal pollution is an important factor in assessing the quality of water and the risk to human health from infection. Examination of water samples for the presence of Escherichia coli (E. coli), which normally inhabits the bowel of man and other warm-blooded animals, provides an indication of such pollution. Examination for coliform bacteria can be more difficult to interpret because some coliform bacteria live in soil and surface fresh water and are not always intestinal. Therefore, the presence of coliform bacteria, although not a proof of faecal contamination, may indicate failure in treatment, storage, or distribution. This document has been prepared by Technical Committee ISO/TC 147 "Water quality" in collaboration with Technical Committee CEN/TC 230 "Water analysis" (secretariat: DIN, Germany). The responsible German body is Standards Committee Water Practice, Subcommittee NA 119-01-03-03 UA "Mikrobiologie" ("Microbiology") of Working Committee NA 119-01-03 AA "Wasseruntersuchung" ("Water examination").

Content
ICS
07.100.20
Replacement amendments

Cooperation at DIN

Loading recommended items...
Loading recommended items...
Loading recommended items...
Loading recommended items...