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GB/T 35188-2017 English PDF

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GB/T 35188-2017: Determination of 131 I in marine sediment--β counting method
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Basic data

Standard ID GB/T 35188-2017 (GB/T35188-2017)
Description (Translated English) Determination of 131 I in marine sediment--�� counting method
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard Z17
Classification of International Standard 07.060; 13.060
Word Count Estimation 14,152
Date of Issue 2017-12-29
Date of Implementation 2018-04-01
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 35188-2017: Determination of 131 I in marine sediment--β counting method

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Determination of 131 I in marine sediment-β counting method ICS 07.060; 13.060 Z17 National Standards of People's Republic of China Determination of iodine - 131 in marine sediments β counting method 2017-12-29 Posted 2018-04-01 implementation General Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China China National Standardization Administration released Directory Foreword Ⅲ 1 Scope 1 2 Normative references 1 3 Terms and definitions 1 4 method principle 2 5 Reagents and materials 2 6 instruments and equipment 3 7 sample 3 8 Analysis Step 3 9 Results Calculation 5 10 blank test 6 11 precision and accuracy 6 Appendix A (Normative) Analysis of 131I sediment records and calculations Table 8 Reference 9

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. Please note that some of this document may be patentable. The issuing agencies of this document do not bear the responsibility of identifying these patents. This standard proposed by the State Oceanic Administration. This standard by the National Marine Standardization Technical Committee (SAC/TC283) centralized. This standard was drafted by the State Oceanic Administration South China Sea Environmental Monitoring Center. The main drafters of this standard. Zhao Li, Zhou Peng, Li Dongmei, Zhang Bao Xue, Zhou Junjie, Li Xiaomin, Liang Qianlin, Charles Chen, Zhong Weiqing, Huang Chuguang, Fang Hongda, Cai Wei Syria, Wu Lingling. Determination of iodine - 131 in marine sediments β counting method Warning --- personnel using this standard should have the formal laboratory work experience. This standard does not indicate all possible safety issues question. It is the user's responsibility to take appropriate safety and health measures and to ensure compliance with the requirements of the relevant state laws and regulations.

1 Scope

This standard specifies the method for the determination of iodine -131 (hereinafter abbreviated as 131I) in marine sediments using the β-counting method. This standard applies to the analysis of marine sediment analysis 131I.

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. GB 17378.3 Marine monitoring code Part 3. Sample collection, storage and transport

3 Terms and definitions

The following terms and definitions apply to this document. 3.1 Radioactive decay radioactivedecay Radionuclides emit particles into another after the phenomenon of radionuclide. 3.2 Half-life radioactivehalf-life Radionuclides have half the time required for nuclear decay. 3.3 Decay constants decayconstant Indicates the probability of a nucleus decaying within a unit of time. 3.4 Background In addition to the count of samples, other counts such as cosmic rays, radioactive contamination, electromagnetic interference and other factors generated in the instrument. 3.5 Background count rate backgroundcountrate In addition to the sample of radioactivity, the count rate caused by other factors. 3.6 Detection efficiency detectionefficiency Under certain detection conditions, the number of particles detected by the detector and the total number of such particles emitted by the radiation source during the same time interval The ratio of said. 3.7 Detection limit lowlimitofdetection The lowest activity detectable by a low background beta gauge for a given level of confidence.

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