• There are no items in your cart

EN ISO 9698:2015

Superseded
Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

View Superseded by
superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

Water quality - Determination of tritium activity concentration - Liquid scintillation counting method (ISO 9698:2010)
Superseded date

06-05-2019

Published date

07-22-2015

Foreword
Introduction
1 Scope
2 Normative references
3 Symbols, definitions and units
4 Principle
5 Reagents and equipment
6 Sampling and samples
7 Procedure
8 Expression of results
9 Test report
Annex A (informative) - Numerical applications
Annex B (informative) - Distillation of large volume sample
Annex C (informative) - Internal standard methods
Annex D (informative) - Distillation of small volume sample
Annex E (informative) - Screening method for wet matrices
Bibliography

ISO 9698:2010 specifies the conditions for the determination of tritium activity concentration in samples of environmental water or of tritiated water using liquid scintillation counting.The choice of the analytical procedure, either with or without distillation of the water sample prior to determination, depends on the aim of the measurement and the sample characteristics.Direct measurement of a raw water sample using liquid scintillation counting has to consider the potential presence of other beta emitter radionuclides. To avoid interference with these radionuclides when they are detected, the quantification of tritium will be performed following the sample treatment by distillation. Three distillation procedures are described.The method is not applicable to the analysis of organically bound tritium; its determination requires additional chemical processing (such as chemical oxidation or combustion).With suitable technical conditions, the detection limit may be as low as 1 Bq l-1. Tritium activity concentrations below 106 Bq l-1 can be determined without any sample dilution. A prior enrichment step can significantly lower the limit of detection.

Committee
CEN/TC 230
DocumentType
Standard
PublisherName
Comite Europeen de Normalisation
Status
Superseded
SupersededBy

ISO/IEC 17025:2005 General requirements for the competence of testing and calibration laboratories
ISO 5667-14:2014 Water quality Sampling Part 14: Guidance on quality assurance and quality control of environmental water sampling and handling
ISO 5667-3:2012 Water quality Sampling Part 3: Preservation and handling of water samples
ISO/IEC Guide 99:2007 International vocabulary of metrology Basic and general concepts and associated terms (VIM)
ISO 5667-1:2006 Water quality Sampling Part 1: Guidance on the design of sampling programmes and sampling techniques
ISO 11929:2010 Determination of the characteristic limits (decision threshold, detection limit and limits of the confidence interval) for measurements of ionizing radiation Fundamentals and application
ISO/IEC Guide 98-3:2008 Uncertainty of measurement — Part 3: Guide to the expression of uncertainty in measurement (GUM:1995)
ISO 80000-10:2009 Quantities and units Part 10: Atomic and nuclear physics

View more information
Sorry this product is not available in your region.

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.