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Standard Test Method for Alpha-Particle-Emitting Isotopes of Radium in Water (Withdrawn 2022)
Automaticky přeložený název:
Standardní zkušební metoda pro částice alfa-Emitting izotopů radia ve vodě
NORMA vydána dne 1.1.2013
Označení normy: ASTM D2460-07(2013)
Poznámka: NEPLATNÁ
Datum vydání normy: 1.1.2013
Kód zboží: NS-20430
Počet stran: 7
Přibližná hmotnost: 21 g (0.05 liber)
Země: Americká technická norma
Kategorie: Technické normy ASTM
Zkoušení chemických substancí vody
Zkoušení fyzikálních vlastností vody
Keywords:
alpha particles, radioactivity, radium isotopes, water, ICS Number Code 13.060.50 (Examination of water for chemical substances),13.060.60 (Examination of water for physical properties)
Significance and Use | ||||||||||||||||||||||
5.1 Radium is one of the most radiotoxic elements. Its isotope of mass 226 is the most hazardous because of its long half-life. The isotopes 223 and 224, although not as hazardous, are of some concern in appraising the quality of water. 5.2 The alpha-particle-emitting isotopes of radium other than that of mass 226 may be determined by difference if radium-226 is measured separately, such as by Test Method D3454. Note that one finds 226Ra and 223Ra together in variable proportions (5, 6), but 224Ra does not normally occur with them. Thus, 223Ra often may be determined by simply subtracting the 226Ra content from the total: and if 226Ra and 223Ra are low, 224Ra may be determined directly. The determination of a single isotope in a mixture is less precise than if it occurred alone. |
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1. Scope | ||||||||||||||||||||||
1.1 This test method covers the separation of dissolved radium from water for the purpose of measuring its radioactivity. Although all radium isotopes are separated, the test method is limited to alpha-particle-emitting isotopes by choice of radiation detector. The most important of these radioisotopes are 223Ra, 224Ra, and 226Ra. The lower limit of concentration to which this test method is applicable is 3.7 × 10-2 Bq/L (1 pCi/L). 1.2 This test method may be used for absolute measurements by calibrating with a suitable alpha-emitting radioisotope such as 226 Ra, or for relative methods by comparing measurements with each other. Mixtures of radium isotopes may be reported as equivalent 226Ra. Information is also provided from which the relative contributions of radium isotopes may be calculated. 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.
Standard Specification for Reagent
Water Standard Terminology Relating to Water
(Includes all amendments and changes 2/14/2024). Standard Terminology Relating to Nuclear
Materials Standard Test Method for Radium-226 in
Water Standard Practices for Sampling Water
from Flowing Process Streams Standard Test Method for Alpha Particle
Radioactivity of Water Standard Practices for the Measurement of
Radioactivity Standard Guide for Sampling Ground-Water
Monitoring Wells Standard Practice for Writing Quality
Control Specifications for Standard Test Methods for Water
Analysis Standard Guide for Direct-Push
Groundwater Sampling for Environmental Site Characterization Standard Practice for Determination of
Precision and Bias of Applicable Test Methods of Committee D19 on
Water |
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