ISO/TC 147/SC 3
| Projekta Nr. | ISO 13165-4:2025 |
|---|---|
| Nosaukums | <p class="MsoBodyText"><span lang="EN-GB">This document specifies methods to determine <sup>226</sup>Ra by alpha spectrometry in supply water, drinking water, rainwater, surface and ground water, marine water, as well as cooling water, industrial water, domestic, and industrial wastewater after proper sampling, handling and test sample preparation.</span></p> <p class="MsoBodyText"><span lang="EN-GB">The detection limit depends on the sample volume, the instrument used, the background count rate, the detection efficiency, the counting time and the chemical yield. The detection limit of the methods described in this document, using currently available alpha spectrometry apparatus, is equal to or lesser than 3 mBq·l<sup>−1</sup> (or mBq·kg<sup>−1</sup>), which is lower than the WHO criteria for safe consumption of drinking water (1 Bq·l<sup>−1</sup>)<sup>[</sup><!-- [if supportFields]><sup><span style='color:#0070C0'><span style='mso-element:field-begin'></span></span></sup><span style='color:#0070C0'> REF Reference_ref_12 \r \h <sup><span style='mso-element:field-separator'></span></sup></span><![endif]--><sup><span style="color: #0070c0;">4<!-- [if gte mso 9]><xml> <w:data>08D0C9EA79F9BACE118C8200AA004BA90B0200000008000000110000005200650066006500720065006E00630065005F007200650066005F00310032000000</w:data> </xml><![endif]--></span></sup><!-- [if supportFields]><sup><span style='color:#0070C0'><span style='mso-element:field-end'></span></span></sup><![endif]--><sup>]</sup>. This value can typically be achieved with a counting time of 48 h for a test sample volume of 40 ml.</span></p> <p class="MsoBodyText"><span lang="EN-GB">The method described in this document is applicable in the event of an emergency situation.</span></p> <p class="MsoBodyText"><span lang="EN-GB">Filtration of the test sample is necessary for the methods described in this document if suspended solids are present. The analysis of <sup>226</sup>Ra adsorbed to suspended matter is not covered by this method, because it requires a mineralization step. In this case, the measurement is made on the different phases obtained. The final activity is the sum of all the measured activity concentrations.</span></p> <p class="MsoBodyText"><span lang="EN-GB">It is the user’s responsibility to ensure the validity of this test method for the water samples tested.</span></p> |
| Reģistrācijas numurs (WIID) | 85845 |
| Darbības sfēra | <p class="MsoBodyText"><span lang="EN-GB">This document specifies methods to determine <sup>226</sup>Ra by alpha spectrometry in supply water, drinking water, rainwater, surface and ground water, marine water, as well as cooling water, industrial water, domestic, and industrial wastewater after proper sampling, handling and test sample preparation.</span></p> <p class="MsoBodyText"><span lang="EN-GB">The detection limit depends on the sample volume, the instrument used, the background count rate, the detection efficiency, the counting time and the chemical yield. The detection limit of the methods described in this document, using currently available alpha spectrometry apparatus, is equal to or lesser than 3 mBq·l<sup>−1</sup> (or mBq·kg<sup>−1</sup>), which is lower than the WHO criteria for safe consumption of drinking water (1 Bq·l<sup>−1</sup>)<sup>[</sup><!-- [if supportFields]><sup><span style='color:#0070C0'><span style='mso-element:field-begin'></span></span></sup><span style='color:#0070C0'> REF Reference_ref_12 \r \h <sup><span style='mso-element:field-separator'></span></sup></span><![endif]--><sup><span style="color: #0070c0;">4<!-- [if gte mso 9]><xml> <w:data>08D0C9EA79F9BACE118C8200AA004BA90B0200000008000000110000005200650066006500720065006E00630065005F007200650066005F00310032000000</w:data> </xml><![endif]--></span></sup><!-- [if supportFields]><sup><span style='color:#0070C0'><span style='mso-element:field-end'></span></span></sup><![endif]--><sup>]</sup>. This value can typically be achieved with a counting time of 48 h for a test sample volume of 40 ml.</span></p> <p class="MsoBodyText"><span lang="EN-GB">The method described in this document is applicable in the event of an emergency situation.</span></p> <p class="MsoBodyText"><span lang="EN-GB">Filtration of the test sample is necessary for the methods described in this document if suspended solids are present. The analysis of <sup>226</sup>Ra adsorbed to suspended matter is not covered by this method, because it requires a mineralization step. In this case, the measurement is made on the different phases obtained. The final activity is the sum of all the measured activity concentrations.</span></p> <p class="MsoBodyText"><span lang="EN-GB">It is the user’s responsibility to ensure the validity of this test method for the water samples tested.</span></p> |
| Statuss | Standarts spēkā |
| ICS grupa | 13.280 17.240 13.060.60 |