A method for detecting elemental sulfur

A technology of elemental sulfur and detection liquid, which is applied in the direction of color/spectral characteristic measurement, material analysis by observing the influence on chemical indicators, and analysis by making materials undergo chemical reactions, etc. It can solve complex operations, long detection cycles, High detection limit and other problems, to achieve the effect of simple preparation process, quantitative detection, simple and fast operation

Active Publication Date: 2020-06-26
SICHUAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Traditional detection methods for elemental sulfur include chemical titration, sulfur determination instrument detection, atomic absorption spectroscopy, etc., but these methods have more or less problems such as high detection limit, complicated operation, high detection cost, and long detection cycle, which cannot be realized. Fast and trace detection of elemental sulfur

Method used

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  • A method for detecting elemental sulfur
  • A method for detecting elemental sulfur
  • A method for detecting elemental sulfur

Examples

Experimental program
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Effect test

Embodiment 1

[0037] 1) Preparation of detection solution: Take 300ul of hydrazine hydrate solution (mass concentration: 98%) and add it to 3ml of N,N-dimethylformamide (DMF) solution and magnetically stir at a speed of 500r / min for 10min to prepare the detection solution. The volume ratio of N,N-dimethylformamide and hydrazine hydrate solution is 1:10;

[0038] 2) Add the ethanol solution of 300ul sulfur to the detection solution obtained in step 1) to obtain a mixed solution (the concentration of the ethanol solution of sulfur is 100mg / L, that is, the quality of sulfur in 1L ethanol solution is 100mg), after the mixed solution is blue Immediately (within 30s) carry out ultraviolet-visible light detection on the mixed solution, figure 2 The absorption value at 617nm wavelength after color development is given in .

Embodiment 2

[0040]1) Preparation of detection solution: Take 100ul of hydrazine hydrate solution (98% in mass concentration) and add it to 3ml of N,N-dimethylformamide (DMF) solution and magnetically stir at a speed of 500r / min for 10min to prepare the detection solution. The volume ratio of N,N-dimethylformamide and hydrazine hydrate solution is 1:30;

[0041] 2) Add 300ul sulfur ethanol solution to the detection solution obtained in step 1) to obtain a mixed solution (the concentration of sulfur ethanol solution is 100mg / L), and immediately (within 30s) the solution is detected by ultraviolet-visible light after the mixed solution turns blue , the result is as figure 1 shown by figure 1 It can be seen that the sample has an absorption peak at a wavelength of 617nm after developing color in the detection solution; this also echoes the blue color of the solution;

[0042] 3) Add 300ul of sulfur ethanol solution (concentration is 100mg / L) to the detection solution obtained in step 1), af...

Embodiment 3

[0048] 1) Preparation of detection solution: Take 60ul of hydrazine hydrate solution (98% mass concentration) and add it to 3ml of N,N-dimethylformamide (DMF) solution and magnetically stir at a speed of 500r / min for 10min to prepare the detection solution. The volume ratio of N,N-dimethylformamide and hydrazine hydrate solution is 1:50;

[0049] 2) Add 300ul of sulfur ethanol solution (concentration is 100mg / L) to the detection solution obtained in step 1), after the solution is blue, the solution is immediately detected by ultraviolet-visible light, figure 2 The absorption value at 617nm wavelength after color development is given in .

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Abstract

The invention relates to a method for quickly and quantitatively detecting elemental sulfur, which belongs to the technical field of inorganic detection. The present invention provides a method for detecting elemental sulfur. The method is as follows: adding the substance to be tested into the mixed detection solution of N,N-dimethylformamide and hydrazine hydrate, and the mixed detection solution shows blue, indicating that the The substance to be tested contains sulfur; wherein, the volume ratio of N,N-dimethylformamide and hydrazine hydrate in the mixed detection solution is 1:1 to 3000:1. The preparation process of the detection solution of the method of the present invention is simple, and can be stored for a long time; and the detection method of the present invention is simple and quick, and the result only needs to observe the color change of the detection solution with the naked eye; trace detection.

Description

technical field [0001] The invention relates to a method for quickly and quantitatively detecting elemental sulfur, which belongs to the technical field of inorganic detection. Background technique [0002] Sulfur exists widely in nature and is also an essential element for people's life and production. Sulfur exists in various forms such as elemental sulfur, hydrogen sulfide, metal sulfide and sulfate in nature. Sulfur ore can be directly used to produce sulfur and sulfuric acid, both of which are very versatile. Therefore, the detection of sulfur ore is particularly important. [0003] One of the more common forms of sulfur element in sulfur-containing wastewater and waste residue is elemental sulfur, and secondly, elemental sulfur is also ubiquitous in coal mines. Coal or industrial raw materials containing elemental sulfur are easy to use in the process of use. Produce sulfur by-products, such as sulfur dioxide, hydrogen sulfide and other toxic gases. Therefore, the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/78G01N21/31
CPCG01N21/31G01N21/78
Inventor 杨伟喻鹏翟元明包睿莹刘正英杨鸣波
Owner SICHUAN UNIV
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