Search result: GB/T 42490-2023
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 42490-2023 | English | 279 |
Add to Cart
|
3 days [Need to translate]
|
Soil quality - Determination of total content and isotope ratio of organic carbon and nitrogen of soil and biological samples - Stable isotope ratio mass spectrometry
| Valid |
GB/T 42490-2023
|
| Standard ID | GB/T 42490-2023 (GB/T42490-2023) | | Description (Translated English) | Soil quality -- Determination of total content and isotope ratio of organic carbon and nitrogen of soil and biological samples -- Stable isotope ratio mass spectrometry | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | B10 | | Classification of International Standard | 13.080.01 | | Word Count Estimation | 13,161 | | Date of Issue | 2023-03-17 | | Date of Implementation | 2023-10-01 | | Issuing agency(ies) | State Administration for Market Regulation, National Standardization Management Committee |
GB/T 42490-2023
ICS 13.080.01
CCSB10
National Standards of People's Republic of China
Soil Quality Organic Carbon Content in Soil and Biological Samples
and carbon isotope ratio, total nitrogen content and nitrogen isotope
Stable Isotope Ratio Mass Spectrometry
Released on 2023-03-17
2023-10-01 implementation
State Administration for Market Regulation
Released by the National Standardization Management Committee
table of contents
Preface III
1 Range 1
2 Normative references 1
3 Terms and Definitions 1
4 Abbreviations 2
5 Principle 2
6 Reagents and materials 2
7 Instruments and Equipment 2
8 Test Step 3
9 calculation 4
10 Precision of measurement results 5
11 Quality Assurance and Control 6
Appendix A (informative) Standard substance 7
Reference 8
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 was proposed by the Ministry of Agriculture and Rural Affairs of the People's Republic of China.
This document is under the jurisdiction of the National Soil Quality Standardization Technical Committee (SAC/TC404).
This document was drafted by. Nanjing Institute of Soil Science, Chinese Academy of Sciences, Institute of Urban Environment, Chinese Academy of Sciences, Subtropical Agricultural Sciences, Chinese Academy of Sciences
Industrial Ecology Research Institute, Nanjing Normal University, Shanghai Jiaotong University, Beijing Kehui Testing Technology Co., Ltd., Jiangsu Quality and Standardization Research Institute
Academy.
The main drafters of this document. Cao Yacheng, Wang Xi, Sun Xiaoli, Sun Deling, Zhang Han, Yuan Hongchao, Wen Teng, Zhang Li, Yang Lu, Dai Chenyan, He Zhen,
Wei Lai, Yang Fan, Zhang Shanshan, Zha Mingxia, Wu Jie.
Soil Quality Organic Carbon Content in Soil and Biological Samples
and carbon isotope ratio, total nitrogen content and nitrogen isotope
Stable Isotope Ratio Mass Spectrometry
1 Scope
This document describes the determination of soil and biological samples (plants,
The method of organic carbon content and carbon isotope ratio, total nitrogen content and nitrogen isotope ratio in animals, microorganisms).
This document is applicable to the determination of organic carbon and total nitrogen in soil and biological samples, as well as non-marker (natural abundance) and tracer tests.
Determination of carbon and nitrogen isotope ratios of organic carbon and total nitrogen in soil and biological samples tested (f13C≤30%, f15N≤30%).
This document determines the quantitative limits of organic carbon, total nitrogen content and carbon and nitrogen isotope ratios in soil and biological samples (in terms of absolute carbon and nitrogen).
Carbon 30μg; Nitrogen 20μg.
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 6379.2 Accuracy of measurement methods and results (trueness and precision) - Part 2.Determination of repeatability of standard measurement methods
Fundamental methods of sex and reproducibility
GB/T 6682 Analytical laboratory water specifications and test methods
GB/T 37847-2019 General Rules for Isotopic Composition Mass Spectrometry Methods
GB/T 37885 Classification of Chemical Reagents
3 Terms and Definitions
The following terms and definitions defined in GB/T 37847-2019 apply to this document.
3.1
isotope
Different atoms of the same element with the same number of protons but different numbers of neutrons (or different mass numbers).
3.2
isotope ratio isotoperatio
The ratio of the number of moles or atoms or ions of two isotopes.
3.3
isotope abundance
The percentage of isotope atomic number in the element's total atomic number.
Note. The isotopic abundance is expressed in percentage (%).
3.4
isotopic composition isotopecomposition
The proportion of each isotope in an element expressed in atomic percentage, and their sum is equal to 1.
......
|