1.1本试验方法涵盖了由于铜粉、钨粉和铁粉中存在氢还原氧化物而产生的氧气的测定。该试验方法包括在标准温度和时间条件下使粉末样品经受含氢气体的作用，并测量由此产生的重量损失。本试验方法适用于0.05%至3.0%氧气范围内的铜粉和铁粉，以及0.01%至0.50%氧气范围内的钨粉。本试验方法不测量氧化硅（SiO）等氧化物中所含的氧 2. )，氧化铝（Al 2. O 3. )、氧化镁（MgO）、氧化钙（CaO）、二氧化钛（TiO 2. )等，在试验温度下不会被氢还原。对于总氧含量，可用真空或惰性气体熔合方法。 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 本标准并非旨在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 determination of oxygen due to the presence of hydrogen-reducible oxides in copper, tungsten, and iron powders. This test method consists of subjecting a sample of powder to the action of a hydrogen-containing gas under standard conditions of temperature and time and measuring the resulting loss of weight. This test method is useful for copper and iron powders in the range from 0.05 to 3.0% oxygen and for tungsten powder in the range from 0.01 to 0.50% oxygen. This test method does not measure the oxygen contained in oxides such as silicon oxide (SiO 2 ), aluminum oxide (Al 2 O 3 ), magnesium oxide (MgO), calcium oxide (CaO), titanium dioxide (TiO 2 ), etc. that are not reduced by hydrogen at the test temperatures. For total oxygen content, vacuum or inert gas fusion methods are available. 1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are provided for information only. 1.3 This standard does not purport to address all of the safety problems, 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.