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GB/T 42488-2023 English PDF

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GB/T 42488-2023: Soil quality - Determination of nitrogen-15 abundance of inorganic nitrogen in soil - Stable isotope ratio mass spectrometry
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GB/T 42488-2023English279 Add to Cart 3 days [Need to translate] Soil quality - Determination of nitrogen-15 abundance of inorganic nitrogen in soil - Stable isotope ratio mass spectrometry Valid GB/T 42488-2023

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Basic data

Standard ID GB/T 42488-2023 (GB/T42488-2023)
Description (Translated English) Soil quality - Determination of nitrogen-15 abundance of inorganic nitrogen in soil - 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 14,197
Date of Issue 2023-03-17
Date of Implementation 2023-10-01
Issuing agency(ies) State Administration for Market Regulation, China National Standardization Administration

GB/T 42488-2023: Soil quality - Determination of nitrogen-15 abundance of inorganic nitrogen in soil - Stable isotope ratio mass spectrometry


---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 13.080.01 CCSB10 National Standards of People's Republic of China Soil Quality Determination of Inorganic Nitrogen 15N Abundance in Soil 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 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 Symbols and abbreviations1 5 Principle 2 6 Reagents and Materials 3 7 Instruments and equipment 4 8 Analysis step 4 9 Compute 6 10 Precision of measurement results 6 11 Quality Assurance and Control 7 Appendix A (informative) Introduction to sample preparation device (auxiliary device for converting trace amounts of nitrogen into nitrous oxide) and analysis steps 8 Reference 9

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, Zhang Han, Yuan Hongchao, Wen Teng, Zhang Li, Yang Lu, He Zhen, Zhang Peiyi, Yang Fan, Wei Lai, Zha Mingxia, Hou Yueli. Soil Quality Determination of Inorganic Nitrogen 15N Abundance in Soil stable isotope ratio mass spectrometry

1 Scope

This document describes the determination of three inorganic states in soil using trace gas preconcentration-isotope ratio mass spectrometry (TGC-IRMS) Nitrogen (ammonium nitrogen NH4, nitrate nitrogen NO3- and nitrite NO2-) 15N abundance method. This document is applicable to the uniformly mixed soil after the 15N tracer test (f15N≤30%). In this document, the quantitative limit of ammonium nitrogen in soil is 6 mg/kg, the quantitative limit of nitrate nitrogen is 3 mg/kg, and the quantitative limit of nitrite nitrogen is 0.15 mg/kg.

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 37885 Classification of Chemical Reagents ISO /T S14256-1.2003 Soil Quality Potassium Chloride Solution Extraction Determination of Nitrate Nitrogen, Nitrite Nitrogen and Ammonium in Fresh Soil

3 Terms and Definitions

This document does not have terms and definitions that need to be defined.

4 Symbols and abbreviations

The following symbols and abbreviations apply to this document. f15N. 15N abundance, the percentage (%) of 15N atoms in the total number of nitrogen atoms. R45.Ion current intensity ratio, the ratio of the ion current intensity I45 with a mass-to-charge ratio (m/z) of 45 to the ion current intensity I44 with a mass-to-charge ratio of 44 (I45/I44). Mass Spectrometer).

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