Method for detecting sulfur isotopes in urban landscaping engineering cultivation soil

A technology for sulfur isotopes and urban greening, which is applied in measurement devices, material analysis by electromagnetic means, instruments, etc., can solve the problems of affecting the detection results, difficult to focus receivers, etc., achieving good reproducibility, easy operation, and improved accuracy. Sexual and Reproducible Effects

Inactive Publication Date: 2021-04-30
TIANJIN NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When switching from carbon and nitrogen isotope detection to sulfur isotope detection, due to the influence of the memory effect ...

Method used

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  • Method for detecting sulfur isotopes in urban landscaping engineering cultivation soil
  • Method for detecting sulfur isotopes in urban landscaping engineering cultivation soil
  • Method for detecting sulfur isotopes in urban landscaping engineering cultivation soil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The method for detecting sulfur isotopes in soil for urban greening projects comprises the following steps:

[0021] a. After drying, grinding, and sieve-filtering the soil samples cultivated in greening projects, accurately weigh 5.0 mg of the samples and put them into tin cups and wrap them.

[0022] b. IAEA-S-1 (silver sulfide, δS34=-0.30‰), IAEA-S-3 (silver sulfide, δS34=-32.3‰), NBS-127 (barium sulfate, δS34=20.3‰) is the standard product.

[0023] c. Use an elemental analyzer-stable isotope mass spectrometer to detect the sample to be tested; the parameters of the elemental analyzer are: the temperature of the oxidation zone is 1020 ° C, the column oven is 80 ° C, and the catalyst in the quartz tube in the oxidation furnace is 25 grams of tungsten oxide and particles 50 grams of pure copper.

[0024] d. The high-energy ion source ionizes the sample to generate SO + The parameters of the ion source of the stable isotope mass spectrometer are: the core voltage of...

Embodiment 2

[0032] The method for detecting sulfur isotopes in soil for urban greening projects comprises the following steps:

[0033] a. After drying, grinding, and sieve-filtering soil samples for landscaping projects, accurately weigh 1.0, 2.5, 4.0, 5.5, 7.0, 8.5, and 10.0 mg samples, respectively, and put them into tin cups and wrap them.

[0034] b. IAEA-S-1 (silver sulfide, δS34=-0.30‰), IAEA-S-3 (silver sulfide, δS34=-32.3‰), NBS-127 (barium sulfate, δS34=20.3‰) is the standard product.

[0035] c. Use an elemental analyzer-stable isotope mass spectrometer to detect the sample to be tested; the parameter of the elemental analyzer is: oxidation c. Use an elemental analyzer-stable isotope mass spectrometer to detect the sample to be tested; the parameter of the elemental analyzer is: oxidation The zone temperature is 1020°C, the column oven is 80°C, and the catalyst in the quartz tube in the oxidation furnace is 25 grams of tungsten oxide and 50 grams of granular pure copper.

[0...

Embodiment 3

[0044] comparative test

[0045]

[0046] In summary, the method of the present invention has the advantages of high analysis efficiency, good precision and repeatability, easy operation, and simple maintenance, and can be applied to the detection of sulfur isotopes in cultivated soil samples in greening projects.

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Abstract

The invention discloses a method for detecting sulfur isotopes in urban landscaping engineering cultivation soil, which comprises the following specific steps: drying, grinding and filtering a landscaping engineering cultivation soil sample by a screen, filling a tin cup with the sample, wrapping the tin cup, and detecting a sample to be detected by using an element analyzer- stable isotope mass spectrometer. The secondary ionization effect of high-energy electron flow on SO2+ is realized by tuning the voltage of the ion source half plate and the electron bombardment source, and SO+ is generated for sulfur isotope detection, so that the sulfur isotope ratio detection accuracy and the analysis efficiency of the greening engineering cultivation soil sample are improved.

Description

[0001] The invention is supported by Tianjin Normal University Education Fund (043-135202WT1703). technical field [0002] The invention belongs to the technical field of stable isotope analysis, and in particular relates to a method for detecting sulfur isotope in urban greening project cultivation soil. Background technique [0003] With the rapid development of sulfur stable isotope analysis technology, its application in environmental protection and agricultural production has become a research hotspot. At present, sulfur stable isotope technology has been widely used in various fields such as the migration and transformation mechanism of sulfur in various types of soil and the source tracing of pollutants. [0004] At present, the common sulfur stable isotope analysis method is the combination of an elemental analyzer and a mass spectrometer, that is, the sulfur element in the sample is oxidized to sulfur dioxide by the elemental analyzer, and then the sulfur dioxide (S...

Claims

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Application Information

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IPC IPC(8): G01N27/62
CPCG01N27/62
Inventor 高健高瑶赵静媛韩德毅尚云涛
Owner TIANJIN NORMAL UNIVERSITY
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