Sludge sulfur element tracing method in riverway engineering and application

A technology of sulfur and silt, applied in the field of stable isotope analysis, can solve problems such as difficult to focus receivers and affect detection results, and achieve the effects of good reproducibility, improved accuracy and reproducibility, and high accuracy

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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  • Sludge sulfur element tracing method in riverway engineering and application
  • Sludge sulfur element tracing method in riverway engineering and application
  • Sludge sulfur element tracing method in riverway engineering and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The traceability method and application of silt sulfur element in river engineering include the following steps:

[0021] a. After drying, grinding and filtering the sludge sample, accurately weigh 5.0 mg of the sample and 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 oxidation furnace is 25 grams of tungsten oxide and granular 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 the ion source is 6.3KV, the voltage of the H plate of the ion source is 5....

Embodiment 2

[0032] The traceability method and application of silt sulfur element in river engineering include the following steps:

[0033] a. After drying, grinding and filtering the sludge samples, accurately weigh 1.0, 2.5, 4.0, 5.5, 7.0, 8.5 and 10.0mg samples respectively, 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 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.

[0036] 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 the ion source is 6.3KV, the volta...

Embodiment 3

[0044] comparative test

[0045]

[0046] In summary, the method of the present invention has the advantages of detection efficiency, good repeatability, high accuracy, and easy maintenance, and can meet the needs of improving the detection and traceability of sulfur isotopes in sludge samples.

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Abstract

The invention discloses a sludge sulfur element tracing method in riverway engineering and application, and the method comprises the following specific steps: drying, grinding and filtering a sludge sample through a screen, loading the sludge sample into a tin cup and wrapping the tin cup, and detecting a to-be-detected sample by adopting an element analyzer-stable isotope mass spectrometer. According to the invention, the high-energy electron flow generates a secondary ionization effect by optimizing the ion source H plate and the cathode voltage, and sulfur isotope detection is carried out in a sulfur monoxide mode, so that efficient and accurate detection of the sulfur isotope ratio of the river engineering sludge sample is realized, the result precision is high, the reproducibility is good, and the maintenance 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 detecting sulfur isotopes in sludge samples in a sulfur monoxide mode. Background technique [0003] With the rapid development of sulfur stable isotope analysis technology, its application in environmental protection and agricultural production is becoming more and more extensive. At present, the use of stable sulfur isotopes to study the migration and transformation mechanism of sulfur in environmental samples and trace the source of pollutants has become a research hotspot, especially for the analysis and traceability of sulfur in river engineering sludge. [0004] At present, the common traceability method of sulfur stable isotope analysis is the combination of an elemental analyzer and a mass spectrometer, that is, the elemental analyze...

Claims

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Application Information

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IPC IPC(8): G01N27/62
CPCG01N27/62
Inventor 高健初新云尚云涛高瑶王淑芳
Owner TIANJIN NORMAL UNIVERSITY
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