ASTM E385-16

1.1 This test method covers the measurement of oxygen concentration in almost any matrix by using a 14-MeV neutron activation and direct-counting technique. Essentially, the same system may be used to determine oxygen concentrations ranging from under 10 μg/g to over 500 mg/g, depending on the sample size and available 14-MeV neutron fluence rates.

Note 1: The range of analysis may be extended by using higher neutron fluence rates, larger samples, and higher counting efficiency detectors.