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eLibrary > BS EN ISO 13160:2021 Water quality. Strontium 90 and strontium 89. Test methods using liquid scintillation counting or proportional counting >

BS EN ISO 13160:2021 Water quality. Strontium 90 and strontium 89. Test methods using liquid scintillation counting or proportional counting, 2021

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BS EN ISO 13160:2021 Water quality. Strontium 90 and strontium 89. Test methods using liquid scintillation counting or proportional counting, 2021

National foreword
European foreword
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle [Go to Page]
4.1 General
4.2 Chemical separation
4.3 Detection
5 Chemical reagents and equipment
6 Procedure [Go to Page]
6.1 Test sample preparation
6.2 Chemical separation [Go to Page]
6.2.1 General
6.2.2 Precipitation techniques
6.2.3 Liquid–liquid extraction technique
6.2.4 Chromatographic technique
6.3 Preparation of the source for test [Go to Page]
6.3.1 Source preparation for liquid scintillation counter
6.3.2 Source preparation for proportional counter
6.4 Measurement [Go to Page]
6.4.1 General
6.4.2 Liquid scintillation counter
6.4.3 Proportional counter
6.4.4 Efficiency calculation
6.4.5 Determination of the chemical yield
7 Expression of results [Go to Page]
7.1 Determination of 90Sr in equilibrium with 90Y [Go to Page]
7.1.1 Calculation of the activity concentration
7.1.2 Standard uncertainty
7.1.3 Decision threshold
7.1.4 Detection limit
7.2 Determination of 90Sr from separated 90Y [Go to Page]
7.2.1 Calculation of the activity concentration
7.2.2 Standard uncertainty
7.2.3 Decision threshold
7.2.4 Detection limit
7.3 Determination of 90Sr and 89Sr utilizing 90Sr/90Y equilibrium [Go to Page]
7.3.1 Calculation of the activity concentration
7.3.2 Standard uncertainty
7.3.3 Decision threshold
7.3.4 Detection limit
8 Limits of the coverage intervals [Go to Page]
8.1 Limits of the of the probabilistically symmetric coverage interval
8.2 Limits of the shortest coverage interval
9 Quality control
10 Test report
Annex A (informative) Determination of 89Sr and 90Sr by precipitation and proportional counting
Annex B (informative) Determination of 89Sr and 90Sr by precipitation and liquid scintillation counting
Annex C (informative) Determination of 90Sr from its decay progeny 90Y at equilibrium by organic extraction and liquid scintillation counting
Annex D (informative) Determination of 90Sr after ionic exchange separation by proportional counting
Annex E (informative) Determination of 90Sr after separation on a crown ether specific resin and liquid scintillation counting
Annex F (informative) Determination of 90Sr from its decay progeny 90Y at equilibrium by organic extraction and proportional counting
Annex G (informative) Correction factor for 90Sr purity using proportional counting
Bibliography [Go to Page]

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BS EN ISO 13160:2021 Water quality. Strontium 90 and strontium 89. Test methods using liquid scintillation counting or proportional counting, 2021

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