Method for analyzing sulfur isotopes in sulfate of civil engineering drainage system

A technology of sulfur isotope and drainage system, which is applied in the direction of analyzing materials, material analysis by electromagnetic means, measuring devices, etc., can solve the problems of affecting the detection results, difficult to focus receivers, etc., and achieves good reproducibility, easy operation and accuracy. high sex effect

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

AI Technical Summary

Problems solved by technology

When switching from carbon and nitrogen isotope detection to sulfur isotope detection, due to the influence of the memory effect of the instrument, SO with a high mass-to-charge ratio 2 + Difficult to effectively focus on the receiver, affecting detection results

Method used

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  • Method for analyzing sulfur isotopes in sulfate of civil engineering drainage system
  • Method for analyzing sulfur isotopes in sulfate of civil engineering drainage system
  • Method for analyzing sulfur isotopes in sulfate of civil engineering drainage system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The sulfur isotope analysis method in the sulfate of civil engineering drainage system comprises the following steps:

[0021] a. Filter and acidify civil engineering drainage samples to remove carbonates, then add barium chloride to form barium sulfate precipitates to fix sulfate radicals, filter again to collect barium sulfate precipitates, and evaporate the precipitates at 50°C After drying, accurately weigh 5.0 mg of the precipitate into a tin cup and wrap.

[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 tube 1000 ° C, chromatographic column 80 ° C, the catalyst in the quartz tube in the oxidation furnace is 25 grams of tungsten oxide and granular pure Copper 50 grams.

[0024] d. The high-energy ion sou...

Embodiment 2

[0032] The sulfur isotope analysis method in the sulfate of civil engineering drainage system comprises the following steps:

[0033] a. Filter and acidify civil engineering drainage samples to remove carbonates, then add barium chloride to form barium sulfate precipitates to fix sulfate radicals, filter again to collect barium sulfate precipitates, and evaporate the precipitates at 50°C After drying, accurately weigh 1.0, 2.5, 4.0, 5.5, 7.0, 8.5, and 10.0 mg of the precipitate, 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 element analyzer-stable isotope mass spectrometer to detect the sample to be tested; the parameters of the element analyzer are: oxidation tube 1000 ° C, chromatographic column 80 ° C, the catalyst in the quartz tube in the oxidation furnace is 25 grams of tungsten oxide and g...

Embodiment 3

[0044] comparative test

[0045]

[0046] In summary, the method of the present invention has the characteristics of simple operation, high precision, good repeatability, and high efficiency, and can be applied to the detection of sulfur isotopes in civil engineering drainage samples.

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Abstract

The invention discloses a method for analyzing sulfur isotopes in sulfate of a civil engineering drainage system, which comprises the following specific steps: filtering, acidifying, precipitating and evaporating a civil engineering drainage sample to dryness, filling into a tin cup, wrapping, and detecting a sample to be detected by using an element analyzer-stable isotope mass spectrometer. By optimizing isotope mass spectrum ion source electric field parameters and tuning the voltage of the reflecting plate and the ion lens, secondary ionization of high-energy electron flow on SO2+ is realized, SO+ is generated for accurate detection of sulfur isotopes, the result accuracy is high, the reproducibility is good, and the operation is simple and convenient.

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 analyzing sulfur isotope in sulfate in civil engineering drainage systems. Background technique [0003] Sulfur stable isotope analysis technology is widely used in environmental protection and agricultural production, especially plays an important role in the migration and transformation mechanism of sulfur in sulfate in water environment and the traceability 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 (SO 2 ) into sulfur dioxide ions (SO 2 + ) for sulfur isotope ratio analysis. But the SO involved in the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/62
CPCG01N27/62
Inventor 高健高美丽初新云李润斌尚云涛
Owner TIANJIN NORMAL UNIVERSITY
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