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Method for detecting sulfur isotopes in sulfate for experiment teaching management

A technology of teaching management and sulfur isotope, which is applied in measuring devices, scientific instruments, and material analysis through electromagnetic means, can solve problems affecting detection results and difficult to focus receivers, etc., and achieve high analysis efficiency, good reproducibility, easy-to-handle effects

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 detecting sulfur isotopes in sulfate for experiment teaching management
  • Method for detecting sulfur isotopes in sulfate for experiment teaching management
  • Method for detecting sulfur isotopes in sulfate for experiment teaching management

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A method for detecting sulfur isotopes in sulfates used for experimental teaching management, comprising the following steps:

[0022] a. Filter and acidify the water samples for experimental teaching 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.

[0023] 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.

[0024] 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 oxidation furnace is 25 grams of tungsten oxide and granular 50 grams of pure copper.

[0025] d. The high-en...

Embodiment 2

[0033] A method for detecting sulfur isotopes in sulfates used for experimental teaching management, comprising the following steps:

[0034] a. Filter and acidify the water samples for experimental teaching 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.

[0035]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.

[0036] 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 oxidation furnace is 25 grams of tungsten oxi...

Embodiment 3

[0045] comparative test

[0046]

[0047] In summary, the method of the present invention has the advantages of good repeatability, high efficiency, and high accuracy, and can meet the needs of improving the detection level of sulfur isotopes in water samples for experimental teaching.

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Abstract

The invention relates to a method for detecting sulfur isotopes in sulfate for experimental teaching management, and discloses a method for detecting sulfur stable isotopes in a water sample for experimental teaching in an SO+ mode, which comprises the following specific steps: filtering, acidifying, precipitating and evaporating the water sample for experimental teaching to dryness, filling a tin cup with the water sample, and wrapping; and detecting the sample to be detected by adopting an element analyzer stable isotope mass spectrometer. According to the invention, the secondary ionization effect of the ion source high-energy electron flow on SO2+ is utilized to generate SO+ to carry out sulfur isotope detection, so that accurate, efficient and comprehensive management of the water sample for experiment teaching is realized.

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 isotopes in water samples for experimental teaching. Background technique [0003] With the continuous progress and development of sulfur stable isotope analysis technology, its application in environmental protection and agricultural production is becoming more and more mature. There have been many research reports on the use of sulfur stable isotopes to study the migration and transformation mechanism of sulfur in water bodies and the traceability of pollutants. [0004] Experimental teaching is an important part of all kinds of teaching work in our country. At the same time, the current scientific research in our country also has indispensable significance and is a necessary condition for actively promoting the developmen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/62
CPCG01N27/62
Inventor 高健尚云涛王义东陈健全李玉琴
Owner TIANJIN NORMAL UNIVERSITY
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