GB/T 44647-2024 English PDF

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GB/T 44647-2024: Determination of heavy water isotopic purity - Fourier transform infrared spectroscopy
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Basic data

Standard ID: GB/T 44647-2024 (GB/T44647-2024)
Description (Translated English): Determination of heavy water isotopic purity - Fourier transform infrared spectroscopy
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: F60
Classification of International Standard: 27.120.10
Word Count Estimation: 22,251
Date of Issue: 2024-09-29
Date of Implementation: 2024-09-29
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 44647-2024: Determination of heavy water isotopic purity - Fourier transform infrared spectroscopy

---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 27.120.10 CCSF60 National Standard of the People's Republic of China Determination of Isotopic Purity of Heavy Water Fourier transform infrared spectroscopy infrared spectroscopy Released on 2024-09-29 Implementation on September 29, 2024 State Administration for Market Regulation The National Standardization Administration issued

Table of Contents

Preface III 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 Principle 2 5 Reagents and Materials 2 6 Instruments and Equipment 2 7 Preparation of heavy water standard solution 3 7.1 General requirements 3 7.2 Storage of High Isotopic Purity Heavy Water Standard Solution 3 7.3 Preparation of low concentration heavy water standard solution 3 8 Samples 4 8.1 General requirements 4 8.2 Sampling with a syringe 4 8.3 Sampling with a sample bottle 4 9 Drawing of working curve 4 9.1 Overview 4 9.2 Instrument Preparation 5 9.3 Editing Method 6 9.4 Background spectrum 6 9.5 Spectrum of heavy water standard solution 6 9.6 Plotting working curves for different heavy water concentration ranges 6 10 Measurement Step 6 10.1 Sample preparation 6 10.2 Sample loading and scanning 7 10.3 After the measurement is completed 7 11 Results show 7 11.1 Calculation method 7 11.2 Precision 7 11.3 Uncertainty 9 12 Interference factors 9 12.1 Sample contamination 9 12.2 Air Bubbles 9 12.3 Foreign matter on the outer surface of the infrared liquid pool perspective window 9 13 Test Report 9 Appendix A (Informative) Stainless steel storage tank for heavy water standard solution 10 Appendix B (Informative) Recommended Typical Spectral Feature Regions 11 References 16

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. This document is equivalent to ISO 23468.2021 Reactor technology - Power reactor analysis and measurement - Fourier transform infrared spectroscopy Determination of the isotopic purity of heavy water. The following minimal editorial changes were made to this document. --- In order to coordinate with the existing standard, the name of the standard is changed to "Determination of Isotopic Purity of Heavy Water - Fourier Transform Infrared Spectrometry"; --- In 6.4, add "Note. According to laboratory practice, polyethylene or polypropylene is used, and the nominal volume is 5mL~30mL." understand; --- In 6.9, add "Note. According to laboratory practice, use a drying oven with temperature and humidity display inside the oven." for easier understanding. Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents. This document was proposed and coordinated by the National Nuclear Energy Standardization Technical Committee (SAC/TC58). This document was drafted by. China National Nuclear Power Operation and Management Co., Ltd., Nuclear Industry Standardization Institute, and China Institute of Atomic Energy. The main drafters of this document are. You Zhaojin, Qin Jianhua, Lu Dan, Shen Yafang, Wang Huibo, Niu Peng, Han Yugang, Wu Lixin, Wang Xin, Deng Ruiyuan, Liu Shangyuan, Wu Feifei, Sun Yecong, Dong Zhenbang, Hu Shilin, Liu Yan, Wu Chao. Determination of Isotopic Purity of Heavy Water Fourier transform infrared spectroscopy

1 Scope

This document describes a method for determining the isotopic purity of heavy water over the full range using Fourier transform infrared spectroscopy. This document is applicable to the determination of heavy water isotope purity in heavy water reactor nuclear power plants, research reactors, heavy water manufacturers and heavy water related fields.

2 Normative references

The contents of the following documents constitute essential clauses of this document through normative references in this document. For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to This document. andtestmethods) Note. GB/T 6682-2008 Specifications and test methods for water used in analytical laboratories (ISO 3696.1987, MOD)

3 Terms and definitions

The following terms and definitions apply to this document. The terminology databases used for standardization maintained by ISO and IEC are located at. 3.1 Heavy water Water with heavy hydrogen isotopes combined with oxygen in amounts exceeding its natural abundance. Note 1.HDO exists in heavy water and is formed by the rapid exchange of protium (H) atoms and deuterium (D) atoms between light water and heavy water molecules. Note 2.The heavy water described in this document does not refer to heavy water enriched in the heavy oxygen isotopes 17O or 18O. Note 3.The freezing point of heavy water is 3.8°C. Measures should be taken to prevent heavy water from freezing. [Source. ISO 6107.2021, 3.272, modified] 3.2 Light water The protium and deuterium isotopes combined with oxygen are present in the natural abundance of water. 3.3 The molecular bonds of the sample are excited by broadband pulsed infrared radiation, and the absorption spectrum is obtained by Fourier transform. [Source. GB/T 30544.6-2016, 4.8] 3.4 Deuterium Oxide D2O It is composed of two deuterium atoms and one oxygen atom. ......

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