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Standard Test Method for Tritium in Drinking Water
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Available format(s): Hardcopy, PDF
Superseded date: 12-08-2020
Language(s): English
Published date: 15-06-2013
Publisher: American Society for Testing and Materials
CONTAINED IN VOL. 11.02, 2017 Defines the determination of tritium in drinking water by liquid scintillation counting of the tritium beta particle activity.
1.1This test method covers the determination of tritium in drinking water by liquid scintillation counting of the tritium beta particle activity.
1.2This test method is used successfully with drinking water. It is the user's responsibility to ensure the validity of this test method for untested water matrices.
1.3The tritium concentrations, which can be measured by this test method utilizing currently available liquid scintillation instruments, range from less than 0.037 Bq/mL (1 pCi/mL) to 555 Bq/mL (15 000 pCi/mL) for a 10-mL sample aliquot. Higher tritium concentrations can be measured by diluting or using smaller sample aliquots, or both.
1.4The maximum contaminant level for tritium in drinking water as given by the United States Environmental Protection Agency (U.S. EPA) National Interim Primary Drinking Water Regulations (NIPDWR) is 0.740 Bq/mL (20 pCi/mL). The NIPDWR lists a required detection limit for tritium in drinking water of 0.037 Bq/mL (1 pCi/mL), meaning that drinking water supplies, where required, should be monitored for tritium at a sensitivity of 0.037 Bq/mL (1 pCi/mL). In Appendix X1, Eq X1.3 is given for determining the necessary counting time to meet the required sensitivity for drinking water monitoring.
1.5The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.6This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
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