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Determination of ruthenium-106 in seawater - Gamma spectrometry
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Basic data
Standard ID: GB/T 42256-2022 (GB/T42256-2022)
Description (Translated English): Determination of ruthenium-106 in seawater - Gamma spectrometry
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: A45
Classification of International Standard: 07.060
Word Count Estimation: 10,129
Date of Issue: 2022-12-30
Date of Implementation: 2023-04-01
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration
GB/T 42256-2022: Determination of ruthenium-106 in seawater - Gamma spectrometry
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
ICS 07.060
CCSA45
National Standards of People's Republic of China
Analytical Method of Ruthenium-106 in Seawater γ Spectroscopy
Posted on 2022-12-30
2023-04-01 Implementation
State Administration for Market Regulation
Released by the National Standardization Management Committee
foreword
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1.Structure and Drafting Rules for Standardization Documents"
drafting.
Please note that some contents of this document may refer to patents. The issuing agency of this document assumes no responsibility for identifying patents.
This document is proposed by the Ministry of Natural Resources of the People's Republic of China.
This document is under the jurisdiction of the National Marine Standardization Technical Committee (SAC/TC283).
This document was drafted by. The Third Institute of Oceanography, Ministry of Natural Resources.
The main drafters of this document. Yu Tao, Huang Dekun, Lin Jing, Ji Jianda, Ni Jialin, Liu Chuyue, Chen Suiyuan, Jiang Zeyu.
Analytical Method of Ruthenium-106 in Seawater γ Spectroscopy
Warning --- Some reagents used in this document are toxic or corrosive, and the personnel who use this document should have regular laboratory work experience
Experience. This document does not address all possible security issues. It is the user's responsibility to take appropriate safety and health precautions and ensure compliance with
Comply with the conditions stipulated by relevant national laws and regulations.
1 Scope
This document specifies the laboratory method for the determination of the activity of radionuclide 106Ru in seawater using gamma spectrometer.
This document is applicable to the analysis and determination of 106Ru in seawater. The analysis and determination of 106Ru in nuclear industry wastewater can refer to this document.
2 Normative references
The contents of the following documents constitute the essential provisions of this document through normative references in the text. Among them, dated references
For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to
this document.
GB/T 11713-2015 General method for high-purity germanium gamma spectrum analysis
GB 17378.3-2007 Ocean Monitoring Specification Part 3.Sample Collection, Storage and Transportation
3 Terms and Definitions
The following terms and definitions apply to this document.
3.1
The radioactive activity per unit volume of a substance.
[Source. GB/T 4960.1-2010, 3.58, modified]
3.2
In a decay chain, the activity of each radionuclide decays exponentially with time according to the half-life of the precursor nuclide of the chain. this kind
Radioactive equilibrium is only possible if the half-life of the precursor nuclide is longer than that of any other daughter nuclide in the decay chain.
If the half-lives of the precursor nuclides are so long that changes in the overall balance of the precursor nuclides are negligible during the period under consideration, then all
The radioactivity of the nuclides will be nearly equal, and this equilibrium is called long-term equilibrium. Otherwise, it is called temporary equilibrium.
[Source. GB/T 4960.1-2010,3.29]
4 Principles of the method
106Ru is a pure β radionuclide, which will generate short-lived daughter 106Rh after β decay. 106Rh decays in two ways. beta decay and gamma decay
The activity of 106Rh in environmental samples can be measured by gamma spectrometer. The activity of 106Ru in the sample is based on the electrons in radioactive equilibrium with it
The activity of the body nuclide 106Rh was determined.
Sodium sulfide and nickel nitrate reagents were added to seawater to form nickel sulfide precipitates and enrich 106Ru under the condition of pH value 8~9, and γ-energy spectrometer was used to
Take measurements. The activity of 106Ru in seawater was calculated by measuring the 106Rh activity of 106Ru progeny.
......
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