ISO 10703:2007
Water quality - Determination of the activity concentration of radionuclides - Method by high resolution gamma-ray spectrometry
- Standard No.
- ISO 10703:2007
- Release Date
- 2007
- Published By
- International Organization for Standardization (ISO)
- Status
- Replace By
- ISO 10703:2021
- Latest
- ISO 10703:2021
- Scope
- This International Standard specifies a method for the simultaneous determination of the activity concentration of various radionuclides emitting gamma rays with energies 40 keV < E < 2 MeV in water samples, by gamma-ray spectrometry using germanium detectors with high energy resolution in combination with a multichannel analyser. NOTE The determination of the activity concentration of radionuclides emitting gamma rays with energy below 40 keV and above 2 MeV is also possible within the scope of this International Standard, provided both the calibration of the measuring system and the shielding are adapted to this purpose. This International Standard includes the procedures for energy calibration, determination of the energy dependent sensitivity of the measuring system, the analysis of the spectra and the determination of the activity concentration of the various radionuclides in the sample studied. It is only applicable to homogeneous samples. Samples with activities typically between 1 Bq and 104 Bq can be measured as such, i.e. without dilution or concentration of the sample or special (electronic) devices. Depending on different factors, such as the energy of the gamma rays and the emission probability per nuclear disintegration, the size and geometry of the sample and the detector, the shielding, the counting time and other experimental parameters, the sample should be concentrated by evaporation when activities below about 1 Bq have to be measured. Also, when the activity is considerably higher than 104 Bq, the sample should be either diluted or an aliquot of the sample should be taken or the source to detector distance should be increased, or a correction for pile-up effects should be applied.
ISO 10703:2007 Referenced Document
- IEC 60973 Test procedures for germanium gamma-ray detectors
- IEC 61151 Nuclear instrumentation; amplifiers and preamplifiers used with detectors of ionizing radiation; test procedures
- IEC 61452 Nuclear instrumentation - Measurement of activity or emission rate of gamma- ray emitting radionuclides - Calibration and use of germanium-based spectrometers*， 2021-06-01 Update
- ISO 31-9 Quantities and units — Part 9: Atomic and nuclear physics — Amendment 1
- ISO 3696 Water for analytical laboratory use; Specification and test methods
- ISO 5667-1 Water quality — Sampling — Part 1: Guidance on the design of sampling programmes and sampling techniques*， 2023-03-14 Update
- ISO 5667-3 Water quality*， 2024-02-01 Update
- ISO/IEC 17025 General requirements for the competence of testing and calibration laboratories [Standard in French]*， 2017-11-01 Update
ISO 10703:2007 history
- 2021 ISO 10703:2021 Water quality - Gamma-ray emitting radionuclides - Test method using high resolution gamma-ray spectrometry
- 2007 ISO 10703:2007 Water quality - Determination of the activity concentration of radionuclides - Method by high resolution gamma-ray spectrometry
- 1997 ISO 10703:1997 Water quality - Determination of the activity concentration of radionuclides by high resolution gamma-ray spectrometry
