GB/T 42488-2023 in English

VALID

Soil quality—Determination of nitrogen-15 abundance of inorganic nitrogen in soil—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

Price(USD)： $250.00
$243.00

Standard No:	GB/T 42488-2023
Document status:	VALID
Title in English:	Soil quality—Determination of nitrogen-15 abundance of inorganic nitrogen in soil—Stable isotope ratio mass spectrometry
Title in Chinese:	土壤质量土壤中无机态氮15N丰度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:	soil stable isotope ratio mass spectrometry introduction soil quality determination stable isotope ratio mass spectrometry inorganic nitrogen abundance soil quality
Related Topics:	isotope ratio mass spectrometry Stable Secondary Mass Spectrometry Inorganic + Isotope + Mass Spectrometry Inorganic Isotope Mass Spectrometry Determination of total nitrogen in soil Stable Isotope Ratio Mass Spectrometry how to measure isotope ratio light isotope abundance ratio Abundance and Quantification isotope ratio mass spectrometry Stability Mass Spectrometry isotope ratio mass spectrometry Mass Spectrometry Isotope Ratio Quadrupole MS Isotope Ratio stable isotope ratio Soil molybdenum value soil quality Mass Absolute Abundance Abundance measurement stable isotope ratio mass spectrometry Determination of total cobalt in soil mass Determination of manganese in soil Isotope ratio mass spectrometry system Determination method of lithium in soil Isotopic Kurtosis of Nitrogen relative abundance mass spectrometry Isotopes in mass spectrometry stable isotope ratio mass spectrometry Determination method of zinc in soil soil abundance ratio spectrum Is the total phosphorus in the soil stable? Measuring isotope spectra The peak shape of the stable isotope ratio mass spectrometer is unstable Stable Isotope Ratio Mass Spectrometry voc in soil Isotope Ratio Mass Spectrometer Test Mass spectrum isotope peak ratio stable isotope ratio mass spectrometry Gas Isotope Ratio Mass Spectrometry Application of mass spectrometry in isotope Soil Inorganic Chlorine relative abundance in mass spectrometry Soil Quality Standards Mass Spectrometry Nitrogen Oxygen Ratio water quality inorganic nitrogen Abundance in mass spectrometry Soil total nitrogen mass Soil Mass Spectrometer isotope in mass spectrum How does mass spectrometry determine isotopes Soil molybdenum value Detection of isotopes in mass spectrometry MS Stability Soil Inorganic Nitrogen Determination Method Mass Spec 5 Nitrogen Oxygen Ratio Determination method of zinc in soil MS Stability icp soil inorganic elements Soil Total Nitrogen Determination Colorimetric Ratio mass spectrometry soil inorganic nitrogen Isotope + mass spectrometry value spectrum soil nitrogen mass spec but ratio Why is the peak ratio of isotopes in mass spectrometry Soil carbon to nitrogen ratio How to measure elements in soil Nitrox ratio in mass spectrometry Soil Inorganic Testing Method Determination of Cobalt Soil Elements in Modern Soils Soil Quality Standards icp determination of elements in soil Soil gene abundance Soil Isotope Analysis soil spectrometry Soil Isotope Analysis Mass Spectrum Peak Intensity Ratio Soil carbon to nitrogen ratio soil nitrogen Abundance mass peak Abundance quantification light isotope abundance ratio Relative Abundance + Mass Spectrum Isotope Mass Spectrometry Applications stable isotope ratio mass spectrometry How to measure soil carbon to nitrogen ratio Chlorine Isotope Mass Spectrum Quadrupole mass spectrometry isotopes Quadrupole Mass Spectrometry Isotope Ratio Mass Spectrometry Nitrogen in Mass Spectrometry Aluminum in soil Determination of total nitrogen in soil Soil Halogen Soil Total Halogen Soil Inorganic Carbon Determination Method Soil carbon and nitrogen ratio meter Mass Spectrometry Concentration Ratio Mass Spectrometry Concentration Ratio Mass Spectrometry Isotopes Bromine and Chlorine Abundance Ratio Mass Spectrometry Soil ammonium nitrogen colorimetric method Mass spectrum is 15 more than molecular weight Soil Inorganic Testing Unstable specific capacity soil relative abundance Soil Nitrogen Determination of soil inorganic carbon content. soil carbon sulfur ratio Soil Inorganic Nitrogen Determination Method Mass Spectrum Abundance Peak nitrogen in soil Ratio meter The form of trace elements in the soil is soil np ratio Soil Nitrogen Relative Abundance in Mass Spectrum Nitrogen content in the soil Isotope mass spectrometry and isotope ratio mass spectrometry Soil Nitrogen Nitrogen in the soil Chlorine bromine isotopes Soil Nitrogen to Phosphorus Ratio silicon in soil MS instability Relative Abundance in Mass Spectrum Determination method of soil organic nitrogen relative isotopic mass liquid mass ratio Robust mass spectrometric identification MS instability isotopes in mass spectrometry multispectral soil Isotopes in Mass Spectrometry Determination of nitrogen in soil Soil Quality Standards ratio of mass spectral peak intensities Soil Organic Spectrum How to measure water quality inorganic nitrogen Inorganic and isotopic mass spectrometry The role of nitrogen in the soil Isotopes and Abundance of Bromine in Mass Spectrum Bromine Isotopic Ratio in Mass Spectrum Mass Spectrometry Concentration Abundance stable isotope mass spectrometry Chlorine Isotopic Mass Spectrum Isotopic Mass Spectrometry Organic Mass Spectrometry Inorganic Mass Spectrometry Mass Spec Chlorine Isotopes Soil Inorganic Preparation Mass Spectrometry Abundance Ratio Abundance of mass spectrum Organic Halogen in Soil Measurement of Stability Inorganic Isotope Mass Spectrometry Eco Center Mass Spectrometry Soil Inherent Nitrogen Isotope Ratio in Mass Spectrum Soil organic nitrogen determination method mass spectrometer soil mass abundance Soil value detection Morphological soil icpms inorganic mass spectrometry mass ratio Soil Nitrogen and Phosphorus Determination Colorimetric Method Soil nitrogen content soil element Soil Inorganic Carbon Soil organic nitrogen detection Determination of Soil Organic Nitrogen carbon nitrogen isotope soil Stable isotope \| Ecological environment \| Isotope mass spectrum soil ec value Soil EC value determination method soil ec value Chlorine isotope peak ratio in mass spectrum GB/T 42490-2023 Soil quality Organic carbon content and carbon isotope ratio, total nitrogen content in soil and biological samples Ammonia nitrogen in soil Soil cadmium speciation Determination method of soil soluble organic nitrogen Comparison of pretreatment methods for determining selenium in soil Determination of tin in soil Soil ammonia nitrogen measurement method Method for measuring soil carbon to nitrogen ratio National standard for soil cadmium element determination Halogens in soil Determination method of soil trace elements Determination method of inorganic carbon in soil Soil ammonia nitrogen standard curve International determination of benzene series in soil Standard value of silver in soil Determination of Germanium in Soil Standard value of zinc in soil Soil available nitrogen measurement standards Standard value of ammonia nitrogen in soil Determination method of soil inorganic carbon What are the methods for measuring soil inorganic nitrogen? Routine chemical measurement methods for nitrogen in soil What method is used to measure trace elements in soil? Soil nitrate nitrogen abundance and deficiency classification Determination of Methanol in Soil International Manganese content in different soils Isotope calibration mass spectrometry method Soil potential gradient test method Determination method of soil inorganic nitrogen Soil inorganic nitrogen determination method salicylic acid Soil trace element abundance and deficiency soil antibiotic limits Soil three-phase determination method Inorganic phosphorus in soil Inorganic phosphorus content in soil Mass spectrometry power supply stability test Soil cadmium speciation determination method Soil ammonia nitrogen quality Soil quality standard ammonia nitrogen Evaluation of ammonia nitrogen in soil Soil nitrate nitrogen limit Determination method of nitrogen, phosphorus and potassium in soil Soil Inorganic Phosphorus Testing Method Ammonia nitrogen soil quality Specific rotation is not determined into the mass Method for determination of soil carbon, nitrogen and phosphorus Ammonia nitrogen implementation in soil Manganese concentration in soil China soil uranium standard value Soil Inorganic Carbon Determination soil density meter nominal value Determination method of total nitrogen in soil Tin determination in soil Colorimetric determination method of soil organic matter Determination method of selenium in soil Determination of ethanol in soil Benzene concentration in soil Methods for detecting inorganic carbon in soil Comparison of soil organic matter content testing methods

《GB/T 42488-2023土壤质量土壤中无机态氮15N丰度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. Background and significance of the standard

GB/T 42488-2023 "Soil quality - Determination of inorganic nitrogen $^{15}\mathbf{N}$ abundance in soil - Stable isotope ratio mass spectrometry" is an important standard for the determination of inorganic nitrogen abundance in soil. This standard is based on stable isotope ratio mass spectrometry (IRMS) and combined with trace gas preconcentration technology (TGC), providing an efficient and accurate determination method.

2. Comparison of standard frameworks

Standard dimensions	Scope of application	Determination method	Precision requirements
Ammonium nitrogen (NH₄⁺)	Applicable to soil mixed evenly after tracer test, with a quantitative limit of 6 mg/kg.	Converted to nitrous oxide (N₂O) through redox reaction, and the abundance is determined using TGC-IRMS.	Repeatability limit r = 0.020%, reproducibility limit R = 0.117%.
Nitrate Nitrogen (NO₃⁻)	The limit of quantification is 3 mg/kg.	Reduced to nitrous oxide at pH 4.7, the abundance was determined by TGC-IRMS.	The repeatability limit is r = 0.037%, the reproducibility limit is R = 0.096%.
Nitrite Nitrogen (NO₂⁻)	The limit of quantification is 0.15 mg/kg.	Reacts with hydroxylamine to form nitrous oxide, the abundance was determined by TGC-IRMS.	The repeatability limit is r = 0.081%, the reproducibility limit is R = 0.160%.

3. Technical Principles and Innovations

This standard adopts TGC-IRMS coupling technology to convert inorganic nitrogen into nitrous oxide (N₂O) and use mass spectrometry to determine the abundance of $^{15}\mathbf{N}$. This method has the following characteristics:

High sensitivity: TGC can achieve efficient concentration of trace gases.
High precision: The internal precision of IRMS analysis is better than 0.06‰.
Automation: Combined with automatic sample preparation device, it improves efficiency and accuracy.

4. Implementation Suggestions

To ensure the effective implementation of the standard, the following suggestions are put forward:

Equipment Calibration: Regularly calibrate the TGC-IRMS equipment to ensure its stability and accuracy.
Blank test: Each batch of samples needs to be tested with 2 blank test samples to ensure the reliability of the results.
Quality control: Use standard substances with known abundance for multi-point calibration to meet the requirement of R² ≥ 0.999.
Staff training: Provide comprehensive training for operators to ensure that they are familiar with standard procedures and instrument operation.

More samples: GB 50021-2001(2009) GB 18306-2015 YD/T 3934-2021

Sample only — not a preview of GB/T 42488-2023

Loading PDF document...

Error loading PDF. Please make sure the file is valid and try again.

We also recommend

GB/T 45298-2025 in English

Soil mapping—Specification for the symbols, colors and legends of soil texture, pH and salinization maps at the scale of 1：25 000～1：500 000
2025-02-28
GB/T 36197-2018 in English

Soil quality—Guidance on sampling techniques
-