Potřebujeme váš souhlas k využití jednotlivých dat, aby se vám mimo jiné mohly ukazovat informace týkající se vašich zájmů. Souhlas udělíte kliknutím na tlačítko „OK“.
Standard Test Method for Oxygen Content Using a 14-MeV Neutron Activation and Direct-Counting Technique
Automaticky přeložený název:
Standardní zkušební metoda pro obsah kyslíku Použití 14-MeV neutronovou aktivační a Direct-počítání Technika
NORMA vydána dne 1.11.2011
Označení normy: ASTM E385-11
Poznámka: NEPLATNÁ
Datum vydání normy: 1.11.2011
Kód zboží: NS-46610
Počet stran: 8
Přibližná hmotnost: 24 g (0.05 liber)
Země: Americká technická norma
Kategorie: Technické normy ASTM
Keywords:
direct-counting, oxygen, density, neutron, ICS Number Code 27.120.30 (Fissile materials and nuclear fuel technology)
Significance and Use | ||||||
The conventional determination of oxygen content in liquid or solid samples is a relatively difficult chemical procedure. It is slow and usually of limited sensitivity. The 14-MeV neutron activation and direct counting technique provides a rapid, highly sensitive, nondestructive procedure for oxygen determination in a wide range of matrices. This test method is independent of the chemical form of the oxygen. This test method can be used for quality and process control in the metals, coal, and petroleum industries, and for research purposes in a broad spectrum of applications. |
||||||
1. Scope | ||||||
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. 1.2 This test method may be used on either solid or liquid samples, provided that they can be made to conform in size, shape, and macroscopic density during irradiation and counting to a standard sample of known oxygen content. Several variants of this method have been described in the technical literature. A monograph is available which provides a comprehensive description of the principles of activation analysis using a neutron generator (1). 1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.4 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. Specific precautions are given in Section 8. |
||||||
2. Referenced Documents | ||||||
|
Historická
1.6.2010
Historická
1.6.2010
Historická
1.1.2014
Historická
1.1.2012
Historická
1.6.2011
Historická
1.6.2010
Poslední aktualizace: 22.12.2024 (Počet položek: 2 217 000)
© Copyright 2024 NORMSERVIS s.r.o.