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GB/T 35570-2017: Determination of tritium activity concentration in sea water -- Low-background liquid scintillation spectrometry method
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 35570-2017 | English | 279 |
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Determination of tritium activity concentration in sea water -- Low-background liquid scintillation spectrometry method
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GB/T 35570-2017
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Basic data | Standard ID | GB/T 35570-2017 (GB/T35570-2017) | | Description (Translated English) | Determination of tritium activity concentration in sea water -- Low-background liquid scintillation spectrometry method | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | A45 | | Classification of International Standard | 07.060; 13.060 | | Word Count Estimation | 14,198 | | Date of Issue | 2017-12-29 | | Date of Implementation | 2018-07-01 | | Regulation (derived from) | National Standards Bulletin 2017 No. 32 | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | GB/T 35570-2017: Determination of tritium activity concentration in sea water -- Low-background liquid scintillation spectrometry method
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Determination of tritium activity concentration in sea water - Low-background liquid scintillation spectrometry method
ICS 07.060; 13.060
A45
National Standards of People's Republic of China
Determination of tritium in seawater
Low background liquid scintillation spectrometry
2017-12-29 Posted
2018-07-01 implementation
General Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
China National Standardization Administration released
Directory
Preface Ⅰ
1 Scope 1
2 Normative references 1
3 method principle 1
4 reagents 1
5 instruments and equipment 2
6 sample collection and storage 2
7 Analysis Step 2
8 Results Calculation 3
9 precision and accuracy 5
10 Quality Assurance and Quality Control 5
Appendix A (Informative) Vacuum distillation unit schematic 6
Appendix B (Normative) Electrolyte enrichment pretreatment of water samples 7
Appendix C (Normative) Analysis and calculation of tritium in seawater Table 8
Appendix D (informative) method under typical conditions detection limits 9
Reference 10
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard proposed by the State Oceanic Administration.
This standard by the National Marine Standardization Technical Committee (SAC/TC283) centralized.
This standard is drafted by the department. South China Sea Environmental Monitoring Center of the State Oceanic Administration.
The main drafters of this standard. Zheng Yuan to, Zhou Peng, Li Dongmei, Wu Meigui, Zhao Li, Zhao Feng, Fang Hongda, Cai Wei Syria, Lou Quansheng, Liang Qianlin,
Check Chen, Xiong Xiaofei, Wu Lingling, Huang Chuguang, Zhou Peiyu, Guhe Quan.
Determination of tritium in seawater
Low background liquid scintillation spectrometry
1 Scope
This standard specifies the determination of tritium in seawater using low background liquid scintillation spectrometry.
This standard applies to the analysis of tritium in sea water, also applies to coastal waters near the nuclear facilities, as well as tritium in other saline water analysis
Determination.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version applies to this article
Pieces. For undated references, the latest edition (including all amendments) applies to this document.
Marine monitoring code - Part 3. Collection, storage and transport of samples
3 method principle
Tritium is a low-energy beta-emitting nuclide with a maximum energy of 18.6 keV and an average energy of 5.7 keV. After the seawater sample is desalted by distillation, the liquid is used
Body scintillation spectroscopy was used to determine the characteristic β spectra of tritium emission. If the content of tritium in the sample is very low, it can be determined by electrolytic enrichment.
4 reagent
Unless otherwise indicated, all reagents used were of analytical grade.
4.1 tritium standard stock solution .100Bq/g.
4.2 No tritium water.
4.3 tritium standard solution used .1.00Bq/mL.
Accurately weighed 1.0000g tritium standard stock solution (4.1) in a 50mL beaker, with a small amount of tritiated water (4.2) dilution, the total amount of transfer to
100mL volumetric flask (5.8), diluted to the mark, mix well.
4.4 anhydrous sodium carbonate (Na2CO3).
4.5 potassium permanganate (KMnO4).
4.6 Copper powder Particle diameter about 75μm (about.200 mesh).
4.7 2,5-diphenyloxazole [OC (C6H5) = NCH = CC6H5], abbreviated PPO, scintillation pure.
4.8 Toluene (C6H5CH3).
4.9 1,4 - [Bis- (5-phenyloxazol-2)] benzene ([OC (C6H5) = CHN = C] 2C6H4), abbreviated POPOP, scintillation pure.
4.10 Sodium hydroxide (NaOH).
4.11 Triton X-100 [C8H17 (C6H4) (OCH2CH2) 10OH].
4.12 scintillation fluid.
--- Toluene (4.8) and Triton X-100 (4.11) by 2 1 ratio, mix. 4.00 g PPO (4.7) and 0.30 g were weighed
POPOP (4.9) was dissolved in 1000mL toluene - Triton X-100 mixed solution, transferred to a brown reagent bottle juxtaposition
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