GB/T 42490-2023 in English

VALID

Soil quality—Determination of total content and isotope ratio of organic carbon and nitrogen of soil and biological samples—Stable isotope ratio mass spectrometry

Issued on:2023-03-17
Implemented on:2023-10-01
File Format:PDF
Delivery:Via email within 1~3 business days

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Standard No:	GB/T 42490-2023
Document status:	VALID
Title in 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
Title in Chinese:	土壤质量土壤与生物样品中有机碳含量与碳同位素比值、全氮含量与氮同位素比值的测定稳定同位素比值质谱法
Language:	English
File Format:	Electronic (PDF)
Delivery:	Via email within 1~3 business days
Issued on:	2023-03-17
Implemented on:	2023-10-01
ICS Classification:	13.080.01-Soil quality and pedology in general
Chinese Classification:	B10-Soil and fertilizer in general
Professional Classification:	GB-National Standard
Related Keywords:	stable isotope ratio mass spectrometry nitrogen isotope ratio carbon isotope ratio stable isotope ratio mass spectrometry introduction total nitrogen content
Related Topics:	isotope ratio Stable isotopes in isotope ratio Inorganic + Isotope + Mass Spectrometry Inorganic Isotope Mass Spectrometry how to measure isotope ratio Isotope peaks in mass spectrum o8 isotope Trioxygen isotope carbon isotope ratio Environmental isotopes Nitrogen isotopes Carbon Isotope Standard Applications of isotopes Sulfur isotope kurtosis ratio isotope measurement spectrum liquid phase mass spectrometry Stable carbon isotope spectrum isotope ratio mass spectrometry Carbon Isotope Test Method hydrogen isotope mass isotope generating system hydrogen isotope mass isotope ratio isotope ratio mass spectrometry carbon isotopic content ratio Specific capacity and electricity carbon isotope mass spectrometry Chlorine isotope isotope specific radioactivity carbon isotope mass carbon isotope tracer isotope mass Palladium Isotopic Kurtosis Mass Spectrometry Isotope Ratio Yttrium isotope Carbon Isotope Content Method Organic carbon isotope test method Carbon isotopes of organic carbon in water Organic Carbon Carbon Isotopes Organic Carbon Carbon Isotopes Quadrupole MS Isotope Ratio carbon isotope year Beryllium isotope Isotope Monitor Carbon isotope determination method Carbon isotope content stable isotope mass spectrometry monoisotopic peak Isotopes of beryllium isotope group Peak area to mass ratio Beryllium isotope stable isotope ratio Spectral carbon isotope Food Isotope Mass Spectrometry plant stable carbon isotopes Sample purity and content solid isotope liquid isotope Isotope verification Microorganisms and Total Organic Carbon isotope transport isotope ratio hydrogen Oxygen isotope meter Isotope meter isotope mass spectrometry Is the content the same as the quantity? carbon isotope ratio stable isotope geology carbon isotope dating unstable isotope isotope ratio stable isotope total carbon in soil stable isotope ratio mass spectrometry Boxed Isotope Sources Organic Carbon Isotope Record carbon isotope ratio Carbon isotope content carbon isotope meter Stable isotope + mass spectrometry Phytoisotopes Determination method of soil organic carbon content c3 plant isotope Phytoisotopes The most stable isotope of oxygen Portable Carbon Isotope Carbon Isotope Test Method Isotope calculation non-isotopic assay Isotope detection by mass spectrometry Isotopic nitrogen organic carbon content Isotope + Nitrogen isotopes Beryllium 7 isotope Stable isotopes in oxygen Stable Isotope Measurements Isotopic nitrogen Soil matter content Organosulfur isotopes How to detect isotopes Use of isotope mass spectrometry Isotope Ratio Mass Spectrometer Plutonium Isotopic mass spectrometry detection Soil Quality Total Nitrogen and Total Nitrogen Isotope ratio in mass spectrum Palladium isotope content Stable Isotope Measurements carbon stable isotope ratio Organic Hydrogen Isotopes most abundant isotope carbon isotope ratio Isotope ratio mass spectrometry system TOC Isotope Isotope Determination Standard Sample Isotopic Kurtosis of Nitrogen stable isotope analysis stable isotope of h Domestic non-traditional stable isotopes C13 stable isotope isotope content ratio Isotopes in mass spectrometry Carbon Isotope Test isotopes of carbon Stable Isotope Meter For nitrogen isotopes isotope peak ratio carbon isotope method isotope content spectrum Natural isotopic carbon content solid isotope mass spectrometry stable isotope ratio mass spectrometry Determination method of soil organic carbon content Isotopes and natural content of beryllium Soil sample substance content isotope time isotope The same peak has different substances TOC Isotope carbon spectrum of isotope Carbon 13 isotope measurement Carbon Isotope Measurements What is the isotope ratio ratio spectrum Isotope Meter isotope ratio Isotope measurement method Measuring isotope spectra Mass spectrum isotope peaks The peak shape of the stable isotope ratio mass spectrometer is unstable Carbon isotope content Mass spectrum isotope peaks Mass Spec + Isotope three isotopes Stable Isotope Ratio Mass Spectrometry r0 value of organic matter unconventional isotopes Carbon isotope adoption Non-isotopic How to define isotope Total Organic Carbon Content in Soil Isotope Ratio Mass Spectrometer Test Mass spectrum isotope peak ratio How to Measure Isotope Content isotopic organic matter stable isotope ratio mass spectrometry stable isotope plants Gas Isotope Ratio Mass Spectrometry Soil sample dry matter content is average Gas Isotope Ratio Mass Spectrometry Determination of total nitrogen content in soil What are the isotopes of beryllium? relative isotope ratio Application of mass spectrometry in isotope organic carbon content Stable isotope content Dry matter content of soil samples: Carbon three isotopes carbon and oxygen isotope year Isotopic peaks of mass spectra Isotope peak mass spectrum Organic carbon standard value Soil Organic Carbon Measurements Isotopes of Spectral Carbon isotope ratio Stable Isotope Products Determination of elemental content in samples Isotope mass spectrometer and stable isotope mass spectrometer carbon isotope ratio Isotope Meter Used Isotope Mass Spectrum soil inorganic carbon Plant-like isotope detection Isotope determination time Isotopic water quality Does palladium have isotopes? stable isotopic carbon Mass Spectrometry Nitrogen Oxygen Ratio How to measure c isotope Chlorine isotope Shang carbon isotopes liquid isotope Related substances and content carbon isotope method Isotope determination - isotope mass spectrometry cluster isotope measurement organic carbon mass carbon isotope mass spectrometry Water isotope determination method Measure isotope content How to Measure Isotope Content c isotope measurement Bromine Isotopic Kurtosis Ratio Nitrogen content standard carbon isotope peak nitrogen organic carbon carbon isotope peak lithium stable isotope What is the nitrogen content of the soil isotope cluster Beryllium+ isotope Stable isotope samples Stable carbon isotope measurement method MS isotopic ions isotope in mass spectrum Isotopes of Spectral Carbon Nitrogen isotope year Isotope content analysis How does mass spectrometry determine isotopes Radon isotope samples Mass spectrum isotope peak ratio Dry matter content of soil samples Bromine isotope ratio isotopic peak ratio Isotope ratio etc. isotope carbon 3 Isotope mass spectrum calculation isotopic peak ratio relative isotope ratio Oxygen Isotope Ratio Lithium isotope standard sample Sensitivity ratio isotope ratio Carbon and Hydrogen Isotope Analysis Carbon Isotopes of Geological Samples Stable isotope content A method of determining the content of an element in a substance Detection of isotopes in mass spectrometry Strontium isotope ratio Mass spectrometer isotope content Isotope identification Isotopic Peaks in Mass Spectrum Isotope Mass Spectrometry Applications bromine isotope mass specific capacity Carbon Isotope Test Mass Spectrum and Assay Mass Spectrometry Isotope Ratio Gas stable isotope mass spectrometer Mass Spec 5 Nitrogen Oxygen Ratio isospin third component Mass ratio of external standard method ratio of autospectrum to crossspectrum Organic soil lead content mass carbon isotope relative ratio medical isotope Isotopic peaks of chlorine in mass spectrum in situ soil moisture content Mass spectrum isotope peak ratio Isotopic standard samples Peak area to mass ratio peak potential ratio Blank ratio High-quality 12-bit nitrogen blowing instrument Gas Isotope Mass Spectrometry and Chromatography portable stable isotope stable isotopic carbon Isotopic peaks and isotopic ion peaks Weighing of samples four isotopes of lead YoY Soil Total Nitrogen Determination Colorimetric How many isotopic peaks are there Ratio mass spectrometry Isotope hydrogen spectrum Nitrogen isotope nitrogen 16 stable isotope system What is the isotope ratio Isotope + mass spectrometry Element Isotope Meter The content of elements in the soil isotopes of neon isotopic kurtosis Reference + Potential + reference potential soil nitrogen Soil Element Determination Samples Isotopic nitrogen Bromine isotopic peaks Isotope determination report Elemental Content in Soil stability of the same sample mass spec but ratio Why is the peak ratio of isotopes in mass spectrometry Soil carbon to nitrogen ratio The content of total organic carbon in the soil Substance content unit Nitrox ratio in mass spectrometry sample quality Ytterbium isotopes Chlorine isotopic peaks soil moisture unit soil moisture unit How to calculate mass spectrum isotope MS sample peak Mass Spectrum Isotope Peak+ Automatic isotopic internal standard isotope environment Soil Isotope Analysis Inorganic soil samples Cesium isotopes Soil Isotope Analysis isotope cluster Elemental Content in Soil How much zinc is in the soil standard isotope ratio Soil carbon to nitrogen ratio Mass spectrum zero isotope peak Mass spectrum isotope peaks Organic Carbon and Iron pixel colocalization Determination of soil element content pre isotope ratio monoisotopic mass spectrum elemental analysis, mass ratio total nitrogen content Stable Carbon Isotope Measurements total nitrogen content Carbon Isotope Measurements Isotope peak + mass spectrum Molybdenum isotopes How many isotopes does beryllium have Ratios of bromine isotope peaks c3 plant carbon isotope How is the nitrogen isotope plant carbon isotopes Neon isotope c3 plant + carbon isotope plant carbon isotopes How long is carbon isotope determination Isotope products bio-based isotope Germanium isotopes Stable Isotope Analysis of Organic Samples Isotope Mass Spectrometry Applications Bromine isotope peak ratio Isotope products cluster isotope Soil Isotope Samples Isotope + mass spectrum + ratio Soil Total Organic Carbon Content carbon total nitrogen Nitrogen isotope peak stable isotope ratio mass spectrometry light isotope The ratio of ammonia nitrogen to total nitrogen isotope binary mixing How to measure soil carbon to nitrogen ratio Determination of total carbon content in samples Chlorine Isotope Mass Spectrum Organic carbon limit Isotope determination time non-traditional stable isotopes quadrupole mass spectrometry isotope Quadrupole mass spectrometry isotopes MS monoisotope stable isotope ratio analysis Isotope Measuring Instruments Quadrupole Mass Spectrometry Isotope Ratio Mass Spectrometry carbon isotopic peak stable isotope ratio Oxygen isotope ratio Isotope selection General soil element content Peak area ratio and content ratio isotope kurtosis ratio Nitrogen content in soil unconventional stable isotopes Soil Halogen Soil Total Halogen Isotopes of carbon in mass spectra Organic carbon isotope test Test methods for stable carbon isotopes Are organic substances isotopically identical? Soil carbon and nitrogen ratio meter Soil organic carbon approx. isotope definition Mass Spectrometry Isotopes Bromine and Chlorine bromine isotope carbon and oxygen isotope ice age Mass spectrum is 15 more than molecular weight Mass-to-charge ratio Mass-to-mass ratio and mass-to-volume ratio Unstable specific capacity Soil Inorganic Carbon Content Chlorine content in the soil Isotopes of Bromine Soil Nitrogen Determination of soil inorganic carbon content. What is the isotopic peak? soil carbon sulfur ratio Deuterium isotope ratio Bromine isotope mass spectrum peak Soil Total Organic Carbon Content mass specific capacity Is the specific rotation of the same substance the same? isotopes of n nitrogen in soil soil content element Ratio meter carbon isotope ratio Isotope beryllium 10 Soil organic carbon content is generally soil np ratio Soil Nitrogen Measurement of carbon isotopes Nitrogen content in the soil Mass Spectrometer Nitrogen Content Isotopic peak chlorine Isotope mass spectrometry and isotope ratio mass spectrometry unstable isotope Soil Nitrogen Nitrogen in the soil Chlorine bromine isotopes Analysis of Soil Nitrogen Determination Material Specific Curl Value Soil Nitrogen to Phosphorus Ratio total nitrogen and total nitrogen Soil Nitrogen Content Determination method of soil organic nitrogen first isotopic peak Isotopic Year Samples Bromine isotope ratio Nitrogen mass mass ratio dose same sample volume Soil Nitrogen Content relative isotopic mass Element content ratio of silicon to titanium 3 Nitrogen content in water quality isotope measurement Two mass spectrum isotopic peaks of chlorine Isotope measurement time Soil organic carbon content and carbon content isotopically labeled ticks isotopes in mass spectrometry isotopic peak number Palladium isotope quadrupole isotope Isotopes in Mass Spectrometry total nitrogen isotope branch ratio Nitrogen content in the soil Carbon content in the sample Mass Spectrometry Isotope Ratio Soil Organic Spectrum There are twelve isotopic peaks isotopic total organic Voltage and specific capacity Soil Ammonium Nitrogen Content isotopic mass spectrometry elemental mass spectrometry Inorganic and isotopic mass spectrometry Inorganic and Isotopic Bromine mass spectrum isotope peaks Bromine Isotopic Ratio in Mass Spectrum Soil organic carbon content per hectare Cadmium Isotope Bio Isotopic standard samples parity ratio Isoelement four isotopes carbon in soil What are carbon isotopes used for? gc content ratio total nitrogen in soil Cerium isotope stable isotope mass spectrometry Beryllium content in soil Carbon Isotope Products Stable isotope test samples Chlorine Isotopic Mass Spectrum Isotopic Mass Spectrometry Organic Mass Spectrometry Inorganic Mass Spectrometry Mass Spec Chlorine Isotopes microbial organic carbon mass spectrometry isotopic ions Bromine isotope peak ratio How to measure carbon to nitrogen ratio How to measure carbon to nitrogen ratio comparative method in determination of content monoisotopic peak first isotopic peak Energy and spectral peaks of elements Principle of isotope carbon isotope ratio Benzyl Carbon Spectrum Used Isotope Mass Spectrum How much nitrogen is in the soil The amount of nitrogen in the soil Isotopes of Palladium Bitoprost spectral isotope Artificial isotopes of lutetium How many isotopes of beryllium stable isotope of carbon Organic Halogen in Soil Mass Spectrometry Oxygen Isotopes isotope ratio mass spectrometry biological xrd peak and content? Isotopic nitrogen Soil total nitrogen and total nitrogen value comparison iron content in soil An unstable isotope of neon Calculation of Isotope Ratio Determination and Analysis of Nitrogen Content in Soil Isotope Test Samples Determination of the same type or the content of the same substance Determining the content of elements in a sample Inorganic Isotope Mass Spectrometry How to measure nitrogen content in soil Isotopes of Terbium Soil Inherent Nitrogen isotopic peak at Isotope Erbium total nitrogen isotope Isotopes of total nitrogen ICP-MS Determination of Isotope Ratio Isotope Ratio in Mass Spectrum Soil organic nitrogen determination method What are the isotopes of bismuth? Organic carbon reference material Nitrogen content in the sample nitrogen unit Soil nitrogen content Comparison of Multiple Measured Values isotope c1 gas phase mass spectrometry light isotope isotope three minutes Nitrogen content in soil quadrupole isotope mass spectrometry quadrupole + isotope The relative mass of nitrogen mass ratio Organic nitrogen content Total Soil Carbon and Total Nitrogen c isotope determination method Soil Nitrogen and Phosphorus Determination Colorimetric Method Microbial mass spectrometry method comparison Soil nitrogen content The amount of inorganic carbon in the soil soil carbon soil element Soil Inorganic Carbon Uranium Isotope Ratio Soil organic nitrogen detection Stable Isotope Test Soil total nitrogen content Determination of Soil Organic Nitrogen Soil sample total nitrogen carbon nitrogen isotope soil isotope 14 carbon Stable isotope \| Ecological environment \| Isotope mass spectrum Kerogen Carbon Isotopes radionuclide heart-liver ratio Carbon to nitrogen ratio detection Isotope mass spectrometer sample processing Soil contains trace elements soil ec value Liquid phase content measurement deviation for the same sample Isotope ion peak in liquid mass Chlorine isotope peak ratio in mass spectrum Measuring leaf carbon nitrogen and phosphorus content High temperature thermal cracking method for measuring isotopes Soil organic carbon measurement principle stable isotope internal standard method Increased VQ ratio Chemical shift value of carbon GB/T 42490-2023 Soil quality Organic carbon content and carbon isotope ratio, total nitrogen content in soil and biological samples Soil test results total nitrogen content Urea stable isotope standard value Isotope standards Isotope safety Monomeric hydrocarbon carbon isotope testing Method for measuring soil carbon to nitrogen ratio Carbon and nitrogen isotope determination method Iron content in soil Carbon spectrum comparison method Unsieved soil organic carbon content Total soil cadmium content National standard for determination of soil total carbon Determination of total soil carbon Halogens in soil Isotope ratio calculation method Isotope gamma usage Method for measuring total soil carbon Cluster Isotope Testing Titanium content standards in soil Aluminum content in soil Stable isotope testing charges Standard nitrogen isotope ratio Cobalt content in soil Total nitrogen content of farmland soil Method for measuring carbon, nitrogen and phosphorus in soil samples Method for determination of organic carbon in plant samples mass unit ratio size method Quality control sample determination method Soil ammonia nitrogen standard content Standard value of ammonia nitrogen in soil Pitch carbon isotope measurement method Routine chemical measurement methods for nitrogen in soil Manganese content in different soils Isotope calibration mass spectrometry method Soil organic carbon content determination Soil organic carbon content classification Organic carbon isotope standards soil organic carbon emissions Stable carbon and nitrogen isotope standard samples Method for determination of gas stable carbon and hydrogen isotopes soil antibiotic limits How to measure soil organic carbon Isotope experimental method steps Naphthalene content in soil Carbon product quality Soil ammonia nitrogen quality Soil quality standard ammonia nitrogen Determination of total soil carbon content Soil carbon and nitrogen content Nitrogen isotope determination Gaseous carbon isotopes Standard soil organic carbon content Marine carbon and nitrogen isotope analysis methods Stable Isotope Hydrogen Implementation Leaf total organic matter carbon isotopes Total soil carbon determination National soil element content Methods for determination of soil organic carbon and total carbon Ammonia nitrogen soil quality Suspended matter carbon and nitrogen isotopes In-situ monitoring method of farmland nitrogen Method for determination of nitrogen-containing organic base content Method for determination of soil carbon, nitrogen and phosphorus How to express isotopes Ammonia nitrogen content in agricultural land soil gb/t 42490-2023 Soil Inorganic Carbon Determination Soil element content standard table Gas Isotope Quantitative Method Soil total manganese content classification Carbon and Hydrogen Isotope Analysis Isotope mass spectrometry standard glass Colorimetric method for determination of total nitrogen Soil pollution with antibiotic content Soil organic carbon content classification Colorimetric determination method of soil organic matter Stable isotope representation method Soil ammonia nitrogen content Noble Gas Isotope Execution Carbon and nitrogen stable isotope detection technology gbt42490 Standard table of soil total nitrogen content Organic carbon isotope identification Carbon isotope testing in waters Comparison of soil organic matter content testing methods

《GB/T 42490-2023土壤质量土壤与生物样品中有机碳含量与碳同位素比值、全氮含量与氮同位素比值的测定稳定同位素比值质谱法》由TC404（全国土壤质量标准化技术委员会）归口，主管部门为农业农村部。

Introduction

1. Standard Overview

GB/T 42490—2023 is the national standard of the People's Republic of China, mainly for the determination of organic carbon content and carbon isotope ratio, total nitrogen content and nitrogen isotope ratio in soil and biological samples. This standard adopts stable isotope ratio mass spectrometry (EA-IRMS), which is suitable for the analysis of unlabeled and tracer test samples.

2. Background of Standard Formulation

With the increasing demand for global climate change and environmental protection, soil quality testing has become an important part of scientific research and environmental monitoring. This standard was proposed by the Ministry of Agriculture and Rural Affairs and is under the jurisdiction of the National Technical Committee for Soil Quality Standardization. It aims to provide unified technical specifications for isotope analysis of soil and biological samples.

3. Comparison of standard frameworks

Dimensions	Scope of application	Detection methods	Instrument requirements
Organic carbon content	The quantitative limit of organic carbon in soil and biological samples is $30~\mu\mathrm{g}$.	Stable isotope ratio mass spectrometry (EA-IRMS).	The elemental analyzer is equipped with a redox furnace and a mass spectrometer, with an internal precision better than $0.06\text{\textperthousand}$.
Total nitrogen content	The limit of quantification of total nitrogen in soil and biological samples is $20~\mu\mathrm{g}$.	High temperature redox method combined with mass spectrometry analysis.	As above, standard reference gas (purity not less than $99.999\%$) is required.

Case analysis: Soil sample preparation and testing process

Taking air-dried soil samples as an example, the preparation process includes:

Grind and sieve to $100~\mathrm{mesh}$.
Remove inorganic carbon (if any) and perform mass calibration.
Acidification and drying for use.

More samples: DL/T 5154-2012 JC/T 2453-2018 QC/T 942-2021

Sample only — not a preview of GB/T 42490-2023

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