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ISO 29201:2012

Current
Current

The latest, up-to-date edition.

Water quality — The variability of test results and the uncertainty of measurement of microbiological enumeration methods
Available format(s)

Hardcopy , PDF , PDF 3 Users , PDF 5 Users , PDF 9 Users

Language(s)

English

Published date

24-01-2012

This International Standard gives guidelines for the evaluation of uncertainty in quantitative microbiological

analyses based on enumeration of microbial particles by culture. It covers all variants of colony count methods

and most probable number estimates.

Two approaches, the component (also known as bottom‑up or step‑by‑step) and a modified global (top‑down)

approach are included.

The aim is to specify how values of intralaboratory operational variability and combined uncertainty for final

test results can be obtained.

The procedures are not applicable to methods other than enumeration methods.

NOTE 1 Most annexes are normative. However, only the annexes relevant to each case are to be applied. If the choice

is the global approach, then all normative annexes that belong to the component approach can be skipped and vice versa.

NOTE 2 Pre-analytical sampling variance at the source is outside the scope of this International Standard, but needs

to be addressed in sampling designs and monitoring programmes.

NOTE 3 The doubt or uncertainty of decisions based on the use of analytical results whose uncertainty has been

estimated is outside the scope of this International Standard.

NOTE 4 The extra‑analytical variations observed in proficiency tests and intercalibration schemes are also not

detailed in this International Standard, but it is necessary to take them into consideration in analytical control. The use

of intercalibration data in uncertainty estimation offers the possibility for the bias between laboratories to be included

(Nordtest Report TR 537[12]).

DevelopmentNote
Supersedes ISO/DIS 29201. (01/2012)
DocumentType
Standard
Pages
61
PublisherName
International Organization for Standardization
Status
Current

Standards Relationship
PN-ISO 29201:2022-02 Identical

BS EN ISO 13843:2017 Water quality. Requirements for establishing performance characteristics of quantitative microbiological methods
17/30291335 DC : 0 BS EN ISO 8199 - WATER QUALITY - GENERAL REQUIREMENTS AND GUIDANCE FOR MICROBIOLOGICAL EXAMINATIONS BY CULTURE
17/30343024 DC : 0 BS ISO 16266-2 - WATER QUALITY - DETECTION AND ENUMERATION OF PSEUDOMONAS AERUGINOSA - PART 2: MOST PROBABLE NUMBER METHOD
I.S. EN ISO 13843:2017 WATER QUALITY - REQUIREMENTS FOR ESTABLISHING PERFORMANCE CHARACTERISTICS OF QUANTITATIVE MICROBIOLOGICAL METHODS (ISO 13843:2017)
UNE-EN ISO 14189:2017 Water quality - Enumeration of Clostridium perfringens - Method using membrane filtration (ISO 14189:2013)
16/30279101 DC : DRAFT MAR 2016 BS EN ISO 13843 - WATER QUALITY - REQUIREMENTS FOR ESTABLISHING PERFORMANCE CHARACTERISTICS OF QUANTITATIVE MICROBIOLOGICAL METHODS
ISO 13843:2017 Water quality — Requirements for establishing performance characteristics of quantitative microbiological methods
ISO 14189:2013 Water quality — Enumeration of Clostridium perfringens — Method using membrane filtration
EN ISO 14189:2016 Water quality - Enumeration of Clostridium perfringens - Method using membrane filtration (ISO 14189:2013)
BS ISO 14189 : 2013 WATER QUALITY - ENUMERATION OF CLOSTRIDIUM PERFRINGENS - METHOD USING MEMBRANE FILTRATION
15/30266279 DC : 0 BS EN ISO 11731 - WATER QUALITY - ENUMERATION OF LEGIONELLA
EN ISO 13843:2017 Water quality - Requirements for establishing performance characteristics of quantitative microbiological methods (ISO 13843:2017)

ISO/IEC 17025:2005 General requirements for the competence of testing and calibration laboratories
ISO/TS 19036:2006 Microbiology of food and animal feeding stuffs Guidelines for the estimation of measurement uncertainty for quantitative determinations
BS 8496:2007 Water quality. Enumeration of micro-organisms in water samples. Guidance on the estimation of variation of results with particular reference to the contribution of uncertainty of measurement
ISO 5725-3:1994 Accuracy (trueness and precision) of measurement methods and results — Part 3: Intermediate measures of the precision of a standard measurement method
ISO 8199:2005 Water quality General guidance on the enumeration of micro-organisms by culture
ISO/TR 13843:2000 Water quality Guidance on validation of microbiological methods
ISO/IEC Guide 98-3:2008 Uncertainty of measurement — Part 3: Guide to the expression of uncertainty in measurement (GUM:1995)
ISO 3534-1:2006 Statistics — Vocabulary and symbols — Part 1: General statistical terms and terms used in probability

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