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Standard Test Method for Low-Level Analysis of Iodine Radioisotopes in Water (Includes all amendments And changes 6/9/2020).
Automaticky přeložený název:
Standardní zkušební metoda pro Low Level-analýza jódu radioizotopů v vodě
NORMA vydána dne 15.6.2013
Označení normy: ASTM D4785-08(2013)e1
Poznámka: NEPLATNÁ
Datum vydání normy: 15.6.2013
Kód zboží: NS-28558
Počet stran: 8
Přibližná hmotnost: 24 g (0.05 liber)
Země: Americká technická norma
Kategorie: Technické normy ASTM
Keywords:
iodine, ion exchange, low-level activity, radioiodine, radioactivity, solvent extraction water, ICS Number Code 13.060.50 (Examination of water for chemical substances)
Significance and Use | ||||||||||||||||
5.1 This test method was developed for measuring low levels of radioactive iodine in water. The results of the test may be used to determine if the concentration of several radioisotopes of iodine in the sample exceeds the regulatory statutes for drinking water. With a suitable counting technique, sample size, and counting time, a detection limit of less than 0.037 Bq/L (1 pCi/L) is attainable by gamma-ray spectroscopy. This method was tested for 131I . Other iodine radioisotopes should behave in an identical manner in this procedure. However, other iodine radioisotopes have not been tested according to Practice D2777. The user of this method is responsible for determining applicability, bias, and precision for the measurement of other iodine radioisotopes using this method. 5.2 This procedure addresses the analysis of iodine radioisotopes with half-lives greater than 2 hours, which include 121I, 123I, 124I, 125I, 126I, 129I, 130I, 131I, 132I, 133I, and 135I. |
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1. Scope | ||||||||||||||||
1.1 This test method covers the quantification of low levels of radioactive iodine in water by means of chemical separation and counting with a high-resolution gamma ray detector. Iodine is chemically separated from a 4-L water sample using ion exchange and solvent extraction and is then precipitated as cuprous iodide for counting. 1.2 The values stated in SI units are to be regarded as standard. The values given in parentheses are provided for information purposes 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.
Standard Practice for High-Resolution
Gamma-Ray Spectrometry of Water Standard Practices for the Measurement of
Radioactivity Standard Practices for Sampling Water
from Flowing Process Streams Standard Practice for Determination of
Precision and Bias of Applicable Test Methods of Committee D19 on
Water Standard Terminology Relating to Water
(Includes all amendments and changes 2/14/2024). Standard Specification for Reagent
Water Standard Practice for Writing Quality
Control Specifications for Standard Test Methods for Water
Analysis Standard Guide for Management Systems in
Laboratories Engaged in Analysis of Water |
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