ISO 9696:2017
Water quality — Gross alpha activity — Test method using thick source
ISO 9696:2017 specifies a method for the determination of gross alpha activity in non-saline waters for alpha-emitting radionuclides which are not volatile up to 350 °C.
The method is applicable to raw and potable waters.
The range of application depends on the amount of total soluble salts in the water and on the performance characteristics (background count rate and counting efficiency) of the counter.
It is the laboratory's responsibility to ensure the suitability of this method for the water samples tested.
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols
5 Principle
6 Reagents and equipment
6.1 Reagents
6.2 Equipment
7 Procedure
7.1 Sampling
7.2 Pretreatment
7.3 Concentration stage
7.4 Sulfation stage
7.5 Ignition stage
7.6 Source preparation
7.7 Measurement
7.8 Background determination
7.9 Preparation of the calibration source
7.10 Sensitivity and bias
7.11 Optimization of the determination
8 Contamination check
8.1 General
8.2 Radon isotopes losses
8.3 Polonium losses
9 Expression of results
9.1 Calculation of activity concentration
9.2 Standard uncertainty
9.3 Decision threshold
9.4 Detection limit
9.5 Confidence-interval limits
10 Test report
Annex A (informative) Performance criteria
Bibliography
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols
5 Principle
6 Reagents and equipment
6.1 Reagents
6.2 Equipment
7 Procedure
7.1 Sampling
7.2 Pretreatment
7.3 Concentration stage
7.4 Sulfation stage
7.5 Ignition stage
7.6 Source preparation
7.7 Measurement
7.8 Background determination
7.9 Preparation of the calibration source
7.10 Sensitivity and bias
7.11 Optimization of the determination
8 Contamination check
8.1 General
8.2 Radon isotopes losses
8.3 Polonium losses
9 Expression of results
9.1 Calculation of activity concentration
9.2 Standard uncertainty
9.3 Decision threshold
9.4 Detection limit
9.5 Confidence-interval limits
10 Test report
Annex A (informative) Performance criteria
Bibliography