1.1本试验方法包括测量大气中浓度大于74 mBq/m的总氚活度 （2 pCi/m ). 本试验方法包括样品收集、制备和样品的辐射测定。 1.2以国际单位制表示的数值应视为标准。括号中给出的值仅供参考。 1.3本标准无意解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全和健康实践，并确定监管限制的适用性。

1.1 This test method covers the measurement of total tritium activity in the atmosphere in concentrations greater than 74 mBq/m (2 pCi/m ). This test method covers sample collection, preparation, and radiometric assay of the sample. 1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 1.3 This 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.