07.100.20 水的微生物学 标准查询与下载



共找到 429 条与 水的微生物学 相关的标准,共 29

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.

Water quality - Enumeration of Escherichia coli and coliform bacteria - Part 1: Membrane filtration method for waters with low bacterial background flora

ICS
07.100.20
CCS
发布
2014-09
实施

Water quality - Enumeration of Escherichia coli and coliform bacteria - Part 2: Most probable number method (ISO 9308-2:2012)

ICS
07.100.20
CCS
发布
2014-08-29
实施

La présente partie de l'ISO 9308 spécifie une méthode de dénombrement des Escherichia coli et des bactéries coliformes dans l'eau. La méthode est basée sur la croissance d'organismes cibles dans un milieu liquide et sur le calcul du "nombre le plus probable" d'organismes en fonction de tables NPP. Cette méthode peut être appliquée à tous les types d'eau, y compris ceux contenant une quantité appréciable de matière en suspension et des nombres importants de bactéries hétérotrophes. Cependant, elle ne doit pas être utilisée pour dénombrer les bactéries coliformes dans l'eau de mer. Lorsqu'elle est utilisée pour dénombrer Escherichia coli dans l'eau de mer, un

Water quality - Enumeration of Escherichia coli and coliform bacteria - Part 2 : most probable number method

ICS
07.100.20
CCS
发布
2014-06-21
实施
2014-06-21

Water quality - Requirements for the comparison of the relative recovery of microorganisms by two quantitative methods (ISO 17994:2014); German version EN ISO 17994:2014

ICS
07.100.20
CCS
Z16
发布
2014-06
实施

Water quality - Enumeration of Escherichia coli and coliform bacteria - Part 2: Most probable number method (ISO 9308-2:2012); German version EN ISO 9308-2:2014

ICS
07.100.20
CCS
Z16
发布
2014-06
实施

Dieser Teil von ISO 9308 legt ein Verfahren fur die Zahlung von E. coli und coliformen Bakterien in Wasser fest. Das Verfahren beruht auf der Vermehrung von Zielorganismen in einem flussigen Medium und der Berechnung der "wahrscheinlichsten Keimzahl" (en: Most Probable Number, MPN) von Organismen unter Bezugnahme auf MPN-Tabellen. Dieses Verfahren kann auf alle Arten von Wasser angewendet werden, einschlieslich derer, die eine betrachtliche Menge an Schwebstoffen und eine hohe Keimzahl heterotropher Begleitbakterien enthalten. Es darf jedoch nicht zur Zahlung coliformer Bakterien in Meerwasser angewendet werden. Wird das Verfahren zur Zahlung von E. coli in Meerwasser eingesetzt, ist ublicherweise eine Verdunnung in sterilem Wasser von 1:10 erforderlich, obgleich das Verfahren nachweislich mit einigen Meerwassern gut funktioniert, die eine niedrigere als die ubliche Salzkonzentration aufweisen. Wenn keine Daten zur Unterstutzung der Anwendung des Verfahrens ohne Verdunnung vorliegen, wird eine 1:10-Verdunnung verwendet. Dieses Verfahren stutzt sich auf den Nachweis von E. coli auf der Grundlage der Expression des EnzymsD-Glucuronidase und folglich werden viele der enterohamorrhagischen Stamme von E. coli nicht nachgewiesen, die dieses Enzym ublicherweise nicht exprimieren. Auserdem gib es eine geringe Anzahl anderer E. coli-Stamme, die -D-Glucuronidase nicht exprimieren. Die Auswahl der zum Nachweis und zur Bestatigung der coliformen Gruppe von Bakterien, einschlieslich E. coli, angewendeten Untersuchungen kann als Teil einer kontinuierlichen Abfolge angesehen werden. Der Umfang der Bestatigung hangt bei einer bestimmten Probe teils von der Beschaffenheit des Wassers und teils von den Grunden fur die Untersuchung ab. Die in diesem Teil von ISO 9308 beschriebene Untersuchung liefert ein bestatigtes Ergebnis ohne dass eine weitere Bestatigung positiver Vertiefungen erforderlich ist. ANMERKUNG Wahrend in dem Verfahren die Anwendung einer handelsublichen Zahlvorrichtung

Water quality - Enumeration of Escherichia coli and coliform bacteria - Part 2: Most probable number method

ICS
07.100.20
CCS
Z16
发布
2014-04
实施

Water quality. Requirements for the comparison of the relative recovery of microorganisms by two quantitative method

ICS
07.100.20
CCS
Z16
发布
2014-02-28
实施
2014-02-28

Diese Internationale Norm legt ein Bewertungsverfahren fest, um zwei Verfahren mit etablierten Leistungsmerkmalen nach ISO/TR 13843 zu vergleichen, die fur den Nachweis oder die Quantifizierung derselben Zielgruppe oder Spezies von Mikroorganismen vorgesehen sind. Diese Internationale Norm liefert die mathematische Grundlage fur die Bewertung der durchschnittlichen relativen Leistungsfahigkeit von zwei Verfahren unter Heranziehung festgelegter Gleichwertigkeitskriterien. Sie liefert keine Daten, die eine Bewertung der Prazision der verglichenen Verfahren erlaubt. Es ist zweckmasig, dass die Genauigkeit der Verfahren im Rahmen ihrer Leistungscharakterisierung beurteilt werden. Diese Internationale Norm enthalt keine Methoden, um die Leistungsfahigkeit eines Verfahrens in einem einzelnen Labor zu verifizieren.

Water quality - Requirements for the comparison of the relative recovery of microorganisms by two quantitative methods

ICS
07.100.20
CCS
Z16
发布
2014-02
实施

What is ISO 14189 – Water quality about?    ISO 14189 is an international standard that focuses on the enumeration of clostridium perfringens.  Water quality has a significant impact on  water supply  and oftentimes determines supply options. ISO 14189 specifies a method for the enumeration of vegetative cells and spores of Clostridium perfringens by the membrane filtration method in samples of water intended for human consumption. ISO 14189 can be applied to all types of water samples provided they do not contain particulate or colloidal matter that interferes with filtration.   Who is ISO 14189 – Water quality for?   ISO 14189 on the enumeration of clostridium perfringens is useful for:   Water suppl...

Water quality. Enumeration of Clostridium perfringens. Method using membrane filtration

ICS
07.100.20
CCS
发布
2013-11-30
实施
2013-11-30

This International Standard specifies a method for the enumeration of vegetative cells and spores of Clostridium perfringens by the membrane filtration method in samples of water intended for human consumption. However, the method can be applied to all types of water samples provided they do not contain particulate or colloidal matter that interferes with filtration.

Water quality.Enumeration of Clostridium perfringens.Method using membrane filtration

ICS
07.100.20
CCS
Z16
发布
2013-11
实施

Water quality - Detection of Salmonella spp

ICS
07.100.20
CCS
Z16
发布
2013-06-15
实施
2013-06-15

Water quality - Detection of Salmonella spp. (ISO 19250:2010); German version EN ISO 19250:2013

ICS
07.100.20
CCS
Z16
发布
2013-06
实施

ISO 19250:2010 specifies a method for the detection of Salmonella spp. (presumptive or confirmed) in water samples. It is possible that, for epidemiological purposes or during outbreak investigations, other media are also required.

Water quality - Detection of Salmonella spp.

ICS
07.100.20
CCS
发布
2013-05-24
实施
2013-05-24

This International Standard covers the comparison and evaluation of the Same medium prepared from different lots of materials. lt also covers the comparison and evaluation of different media which are used for the Same purpose. lt only deals with the finished product ready to be tested, and not media formulation or preparation. This method applies to the evaluation of any solid media intended for bacteriological isolation and enumeration procedures.

Water quality -- Practices for evaluating and controlling microbiological colony count media used in water quality tests

ICS
07.100.20
CCS
发布
2013-04-01
实施

  Scope is not provided for this standard

Water quality - Detection and enumeration of Escherichia coli and coliform bacteria - Part 1: Membrane filtration method

ICS
07.100.20
CCS
发布
2013-04-01
实施

Abstract ISO 9308-2:2012 specifies a method for the enumeration of E. coli and coliform bacteria 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 organisms by reference to MPN tables. This method can be applied to all types of water, including those containing an appreciable amount of suspended matter and high background counts of heterotrophic bacteria. However it must not be used for the enumeration of coliform bacteria in marine water. When using for the enumeration of E. coli in marine waters, a 1→10 dilution in sterile water is typically required, although the method has been shown to work well with some marine waters that have a lower than normal concentration of salts. In the absence of data to support the use of the method without dilution, a 1→10 dilution is used. This method relies upon the detection of E. coli based upon expression of the enzyme b‑D‑glucuronidase and consequently does not detect many of the enterohaemorhagic strains of E. coli, which do not typically express this enzyme. Additionally, there are a small number of other E. coli strains that do not express b‑D‑glucuronidase. The choice of tests used in the detection and confirmation of the coliform group of bacteria, including E. coli, can be regarded as part of a continuous sequence. The extent of confirmation with a particular sample depends partly on the nature of the water and partly on the reasons for the examination. The test described in ISO 9308-2:2012 provides a confirmed result with no requirement for further confirmation of positive wells.

Water quality -- Enumeration of Escherichia coli and coliform bacteria -- Part 2: Most probable number method

ICS
07.100.20
CCS
发布
2013-04-01
实施

Abstract Gives a procedure for the evaluation and comparison of water-testing filters intended for the enumeration of specific organisms and mixed microbial populations. The procedure provides general guidelines for comparative testing of the recoveries of bacteria, yeasts and other fungi on membrane filters, as compared to recoveries by the spread plate and pour plate techniques.

Water quality -- Evaluation of membrane filters used for microbiological analyses

ICS
07.100.20
CCS
发布
2013-04-01
实施

This part of ISO 10705 specifies a method for the detection and enumeration of somatic coliphages by incubating the sample with an appropriate host strain. The method is applicable to all kinds of water, sediments and sludge extracts, where necessary after dilution. The method is also applicable to shellfish extracts. In the case of low phage numbers, a preconcentration step may be necessary for which a separate International Standard will be developed. NOTE It is desirable for International Standards to be adopted as widely as possible. This part of ISO 10705 includes reference to alternative procedures which obviate the need for expensive materials or equipment which may not be readily available in developing countries. Use of these alternatives will not affect the performance of this method.

Water quality -- Detection and enumeration of bacteriophages -- Part 2: Enumeration of somatic coliphages

ICS
07.100.20
CCS
发布
2013-04-01
实施

This part of ISO 10705 specifies a method for the detection and enumeration of bacteriophages infecting Bacteroides fragilis by incubating the sample with an appropriate host-strain. The method is applicable to all kinds of water, sediments and sludge extracts, where necessary after dilution. In the case of low phage numbers, a preconcentration step may be necessary for which a separate International Standard has been developed. The method is also applicable to shellfish extracts. NOTE It is desirable for International Standards to be adopted as widely as possible. This part of ISO 10705 includes reference to alternative procedures which obviate the need for expensive materials or equipment which may not be readily available in developing countries. Use of these alternatives will not affect the performance of this method.

Water quality -- Detection and enumeration of bacteriophages -- Part 4: Enumeration of bacteriophages infecting Bacteroides fragilis

ICS
07.100.20
CCS
发布
2013-04-01
实施

Diese Internationale Norm legt ein Verfahren zum Nachweis von Salmonella spp. (prasumtiv oder bestatigt) in Wasserproben fest. Es ist moglich, dass bei besonderen epidemiologischen Situationen oder bei Untersuchungen von Krankheitsausbruchen auch andere Medien benotigt werden. WARNUNG - Es ist moglich, dass das Verfahren nicht alle Salmonella ser. Typhi und ser. Paratyphi erfasst. ANMERKUNG Fur eine semi-quanitative Untersuchung konnen MPN-Ansatze (en: most probable number - wahrscheinlichste Zahl) unter Verwendung geeigneter Probenvolumen durchgefuhrt werden. Fur diese Falle wird das Volumen des gepufferten Peptonwassers entsprechend angepasst.

Water quality - Detection of Salmonella spp.

ICS
07.100.20
CCS
Z16
发布
2013-04-01
实施
2013-04-01



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