Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for detecting stable carbon isotopic ratio of soil through near infrared spectrum

A technology of stable carbon isotope and near-infrared spectroscopy, applied in the field of ecology, can solve the problems of high technical requirements, expensive instruments, and high testing costs, and achieves the effects of strong popularity, easy operation and wide application range.

Inactive Publication Date: 2016-04-13
SHANGHAI JIAO TONG UNIV
View PDF4 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Stable isotope ratio mass spectrometers are expensive, require special personnel to operate, the test cycle is long, and the corresponding test costs are also high
Therefore, the determination of soil δ13C by isotope ratio mass spectrometry (IRMS) has the following disadvantages: 1. The instrument is expensive and the test cost is high; 2. The technical requirements are high and it is not easy to operate; 3. The test period is long; 4. It is not easy to popularize
[0009] So far no detection of soil delta using near-infrared (NIR) spectroscopy has been done. 13 C value report

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for detecting stable carbon isotopic ratio of soil through near infrared spectrum
  • Method for detecting stable carbon isotopic ratio of soil through near infrared spectrum
  • Method for detecting stable carbon isotopic ratio of soil through near infrared spectrum

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Example 1 Soil including Oe and Oa

[0060] (1) Prepare the soil sample to be tested. Remove impurities from the mineral layer soil, air-dry, pulverize, pass through a 60-mesh sieve, and store in a desiccator for later use; bake the Oe and Oa layer soil at 60°C for 48 hours to remove moisture, pulverize, pass through a 60-mesh sieve, and store in a desiccator for future use. A total of 199 samples came from different depths (Oe, Oa, 0-2, 2-5, 5-10, 10-20cm) soil samples, including 139 mineral layer soils and 60 Oe and Oa layer soils.

[0061] From Table 1, the accuracy of the spectral model has not been improved after multivariate scattering correction preprocessing, which proves that the sample is well prepared, and the influence of particle scattering effect on spectral acquisition is minimized as much as possible.

[0062] (2) Using stable isotope ratio mass spectrometry to measure the δ of the soil sample to be tested 13 C value.

[0063] (3) Spectrum collection...

Embodiment 2

[0071] Example 2 Mineral layer soil not including Oe and Oa

[0072] (1) Prepare the soil sample to be tested. Remove impurities from the mineral layer soil, air-dry, pulverize, pass through a 60-mesh sieve, and store in a desiccator for future use. A total of 139 samples came from different depths (0-2, 2-5, 5-10, 0-2, 2-5, 5-10, 10-20cm) of mineral layer soil samples.

[0073] From Table 2, the accuracy of the spectral model has not been improved after multivariate scattering correction preprocessing, which proves that the sample is prepared well, and the influence of particle scattering effect on spectral acquisition is minimized as much as possible.

[0074] (2) Using stable isotope ratio mass spectrometry to measure the δ of the soil sample to be tested 13 C value.

[0075] (3) Spectrum collection. Weigh 200 mg of soil sample, place it in a 11 mm cross-section of circular stainless steel cylinder, the bottom is made of low-hydroxyl quartz glass, and the top of the sa...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a method for detecting a stable carbon isotopic ratio of soil through a near infrared spectrum. The method comprises the following steps that 1, stable carbon isotopic ratios of multiple calibrated soil samples are detected; 2, diffuse reflection spectrograms of the near infrared wave sections of the calibrated soil samples are collected to obtain original spectrograms; 3, smoothing pretreatment is performed on the original spectrograms to obtain treated spectrograms; 4, a quantitative relationship model between the treated spectrograms and the stable carbon isotopic ratios of the calibrated soil samples is built by adopting a partial least squares method; 5, a diffuse reflection spectrogram of the near infrared wave section of a to-be-detected soil sample is collected, and the stable carbon isotopic ratio of the to-be-detected soil sample is calculated according to the quantitative relationship model. According to the method, the stable carbon isotopic ratio of the soil can be quickly detected through the near infrared spectrum.

Description

technical field [0001] The invention relates to the field of ecology, in particular to a method for detecting the stable carbon isotope ratio of soil. Background technique [0002] Stable carbon isotope ratio (δ 13 C) Analytical methods can be used to indicate the source of soil organic matter, study the degree of decomposition and turnover of soil organic matter and its components, and reproduce C 3 / C 4 The change history of vegetation is increasingly becoming a powerful tool in soil organic matter studies and ecology. [0003] Determination of soil δ 13 C generally uses stable isotope ratio mass spectrometry (IRMS), and its working principle is: the organic carbon in the soil is converted into gaseous CO through high-temperature combustion. 2 ; After being separated from other gases by the chromatographic column or adsorption column, it is ionized in the ion source; after the ion beam is focused and accelerated, it enters the mass analyzer; z) Deflection occurs, beca...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/359G01N21/3563
CPCG01N21/3563G01N21/359G01N2021/3595
Inventor 喻文娟王瑞斌康宏樟刘星张莉刘玉敏吴玉森
Owner SHANGHAI JIAO TONG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com