Detecting sulfur stable isotope in atmosphere by using sulfur monoxide ion method

A stable isotope and sulfur monoxide technology, applied in the direction of measuring devices, material analysis through electromagnetic means, instruments, etc., can solve problems affecting detection results, difficult to focus receivers, etc.

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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  • Detecting sulfur stable isotope in atmosphere by using sulfur monoxide ion method
  • Detecting sulfur stable isotope in atmosphere by using sulfur monoxide ion method
  • Detecting sulfur stable isotope in atmosphere by using sulfur monoxide ion method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The sulfur monoxide ion method detects sulfur stable isotopes in the atmosphere, including the following steps:

[0021] a. Collect atmospheric samples by filtration, then cut the filter membrane into pieces and add deionized water for ultrasonic extraction, then filter again, then add barium chloride to form a barium sulfate precipitate to fix the sulfate radical, and then put the precipitate and filter membrane together at 850°C Burn under the same conditions to purify the barium sulfate precipitate, accurately weigh 5.0 mg of the precipitate, put it into a tin cup and wrap it.

[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 element analyzer-stable isotope mass spectrometer to detect the sample to be tested; the parameters of the element analyzer are: oxidation furnace 1020 ° C, column oven 85 ° C, the catalyst in the quartz tube in the oxidati...

Embodiment 2

[0032] The sulfur monoxide ion method detects sulfur stable isotopes in the atmosphere, including the following steps:

[0033] a. Collect atmospheric samples by filtration, then cut the filter membrane into pieces and add deionized water for ultrasonic extraction, then filter again, then add barium chloride to form a barium sulfate precipitate to fix the sulfate radical, and then put the precipitate and filter membrane together at 850°C Burn under the same conditions to purify the barium sulfate precipitate, and accurately weigh 1.0, 2.5, 4.0, 5.5, 7.0, 8.5, 10.0 mg of the precipitate into a tin cup and wrap it.

[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 element analyzer-stable isotope mass spectrometer to detect the sample to be tested; the parameters of the element analyzer are: oxidation furnace 1020 ° C, column oven 85 ° C, the catalyst in the...

Embodiment 3

[0044] comparative test

[0045]

[0046] In summary, the method of the present invention has the advantages of high precision, good repeatability, and simple operation, and can meet the needs of improving the detection level of sulfur isotopes in atmospheric samples.

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Abstract

The invention discloses a method for detecting sulfur stable isotope in an atmospheric sample by SO+, which comprises the following steps: filtering and collecting the atmospheric sample, carrying out ultrasonic extraction, precipitating, firing, filling in a tin cup, wrapping, and detecting the sample to be detected by using an element analyzer-stable isotope mass spectrometer. The ion source parameters are optimized, the secondary ionization effect of high-energy electron flow on SO2+ is achieved by tuning the filament and the ion source lens voltage, sulfur isotope detection is conducted in the form of SO+ ions, and therefore accurate detection of the sulfur isotope ratio of an atmospheric sample is achieved, and the method is high in result accuracy, good in repeatability, easy and convenient to operate and high in efficiency.

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, in particular to a method for detecting stable sulfur isotopes in the atmosphere by a sulfur monoxide ion method. Background technique [0003] At present, my country's air pollution, especially PM2.5 pollution in the atmosphere, is severe, and sulfate is one of the important components of atmospheric particulate matter. With the continuous progress and development of sulfur stable isotope analysis technology, there have been many research reports using sulfur stable isotope to trace the source of sulfur in the atmosphere. [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 dioxid...

Claims

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Application Information

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IPC IPC(8): G01N27/62
CPCG01N27/62
Inventor 尚云涛焦新颖夏江周高健王义东赵川
Owner TIANJIN NORMAL UNIVERSITY
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