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ISO 10704:2019 Water quality - Gross alpha and gross beta activity - Test method using thin source deposit >
ISO 10704:2019 Water quality - Gross alpha and gross beta activity - Test method using thin source deposit, 2019
- Foreword
- Introduction
- 1 Scope
- 2 Normative references
- 3 Terms, definitions and symbols
- 4 Principle
- 5 Chemical reagents and equipment
- 5.1 Reagents
- 5.1.1 General
- 5.1.2 Standard solutions
- 5.1.3 Wetting or surfactant agents
- 5.1.4 Volatile organic solvents
- 5.1.5 Water
- 5.1.6 Specific reagents for alpha-emitting radionuclides co-precipitation
- 5.2 Equipment
- 5.2.1 Laboratory equipment for direct evaporation
- 5.2.2 General equipment
- 5.2.3 Special equipment for alpha-emitting radionuclide co-precipitation
- 5.2.4 Measurement equipment
- 6 Sampling
- 7 Procedure
- 7.1 Preliminary
- 7.2 Source preparation
- 7.2.1 Preparation of planchet
- 7.2.2 Evaporation
- 7.2.3 Co-precipitation
- 7.3 Counting stage
- 7.4 Background and blank determination
- 7.5 Preparation of counting standard for calibration
- 7.6 Preparation of calibration source for self-absorption determination
- 7.6.1 General
- 7.6.2 Spiking one of two test portions
- 7.6.3 Self-absorption curve
- 8 Expression of results
- 8.1 General
- 8.2 Alpha activity concentration
- 8.3 Beta activity concentration
- 8.4 Standard uncertainty of the alpha activity concentration
- 8.5 Standard uncertainty of the beta activity concentration
- 8.6 Decision threshold
- 8.6.1 Decision threshold of the alpha activity concentration
- 8.6.2 Decision threshold of the beta activity concentration
- 8.7 Detection limit
- 8.7.1 Detection limit of the alpha activity concentration
- 8.7.2 Detection limit of the beta activity concentration
- 8.8 Confidence limits
- 9 Control of interferences
- 9.1 General
- 9.2 Relative humidity
- 9.3 Geometry of the deposit
- 9.4 Crosstalk
- 9.5 Gamma emitters
- 9.6 Low beta energy
- 9.7 Chlorides
- 9.8 Organic matter
- 9.9 Contamination
- 9.10 Losses of activity
- 9.11 Contribution of the natural radionuclides
- 9.12 Losses of activity
- 10 Test report
- Annex A (informative) Numerical applications
- Bibliography [Go to Page]