ISO/TC 147/SC 3
| Projekta Nr. | ISO 22515:2021 |
|---|---|
| Nosaukums | <p>This document specifies a test method for the determination of iron-55 (<sup>55</sup>Fe) activity concentration in samples of all types of water using liquid scintillation counting (LSC). Using currently available liquid scintillation counters, this test method can measure the <sup>55</sup>Fe activity concentrations in the range from the limit of detection up to 120 mBq l<sup>-1</sup>. These values can be achieved with a counting time between 7 200 s and 10 800 s for a sample volume from 0,5 l to 1,5 l. Higher activity concentrations can be measured by either diluting the sample or using smaller sample aliquots or both.</p> <p>NOTE These performance indicators are wholly dependent on the measurement regimes in individual laboratories; in particular, the detection limits are influenced by amount of stable iron present.</p> <p>The range of application depends on the amount of dissolved material in the water and on the performance characteristics of the measurement equipment (background count rate and counting efficiency).</p> <p>It is the laboratory’s responsibility to ensure the suitability of this test method for the water samples tested.</p> |
| Reģistrācijas numurs (WIID) | 73375 |
| Darbības sfēra | <p>This document specifies a test method for the determination of iron-55 (<sup>55</sup>Fe) activity concentration in samples of all types of water using liquid scintillation counting (LSC). Using currently available liquid scintillation counters, this test method can measure the <sup>55</sup>Fe activity concentrations in the range from the limit of detection up to 120 mBq l<sup>-1</sup>. These values can be achieved with a counting time between 7 200 s and 10 800 s for a sample volume from 0,5 l to 1,5 l. Higher activity concentrations can be measured by either diluting the sample or using smaller sample aliquots or both.</p> <p>NOTE These performance indicators are wholly dependent on the measurement regimes in individual laboratories; in particular, the detection limits are influenced by amount of stable iron present.</p> <p>The range of application depends on the amount of dissolved material in the water and on the performance characteristics of the measurement equipment (background count rate and counting efficiency).</p> <p>It is the laboratory’s responsibility to ensure the suitability of this test method for the water samples tested.</p> |
| Statuss | Standarts spēkā |
| ICS grupa | 13.060.60 17.240 |