GB/T 35570-2017 English PDF

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GB/T 35570-2017: Determination of tritium activity concentration in sea water -- Low-background liquid scintillation spectrometry method
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 35570-2017	279	Add to Cart	3 days	Determination of tritium activity concentration in sea water -- Low-background liquid scintillation spectrometry method	Valid

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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

---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.
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 Save. Now with the current use. ......

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