Method for detecting methylene blue absorption quantity of montmorillonite

A detection method and montmorillonite technology, which are applied in measuring devices, chemical analysis by titration, and material analysis by observing the effect on chemical indicators, can solve the problem of affecting the accuracy of experimental results and the difficulty of the end point of the halo method. Judgment, large volume and other problems, to achieve the effect of simple end point judgment, small error and good repeatability

Inactive Publication Date: 2018-07-24
ZHANGZHOU AONONG ANIMAL HUSBANDRY TECH +2
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] (1) Only use the naked eye to observe the appearance of the light blue halo to determine the end point, and the error is relatively large;
[0005] (2) There will be errors due to the large titrat

Method used

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  • Method for detecting methylene blue absorption quantity of montmorillonite
  • Method for detecting methylene blue absorption quantity of montmorillonite
  • Method for detecting methylene blue absorption quantity of montmorillonite

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Embodiment 1

[0051] A method for detecting blue absorption in montmorillonite, comprising the following steps:

[0052] (1) Disperse the montmorillonite sample in water, add sodium pyrophosphate solution, stir evenly, cool to room temperature after heating to slight boiling;

[0053] (2) Add excessive methylene blue standard solution, stir to make it fully react, produce precipitation, collect filtrate after filtration, add excessive potassium dichromate standard solution in filtrate, filter after water bath and cooling, and wash with water, collect filtrate;

[0054] (3) add sulfuric acid solution and potassium iodide, shake up;

[0055] (4) Titrate with sodium thiosulfate standard solution, add a few drops of starch indicator when the solution is light yellow, turn blue, and titrate until the blue color disappears and turns bright green as the end point.

[0056] specifically:

[0057] 1 Preparation of reagents and equipment required for the test

[0058] 1.1 Sodium pyrophosphate solu...

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Abstract

The invention relates to a method for detecting methylene blue absorption quantity of montmorillonite. The method comprises the following steps: (1) dispersing a montmorillonite test sample into water, adding a sodium pyrophosphate solution, stirring uniformly, heating to slight boiling and cooling to room temperature; (2) adding an excessive methylene blue standard solution, stirring to perform complete reaction, generating precipitate, filtering, collecting filtrate, adding a potassium dichromate standard solution into the filtrate, performing water bath, cooling and filtering, washing withwater and collecting the filtrate; (3) adding a sulfuric acid solution and potassium iodide and shaking up; and (4) performing titration by using a sodium thiosulfate standard solution until the solution is faint yellow, adding several drops of starch indicator olution is faint yellow to enable the solution to be blue, and performing titration until blue color disappears, wherein bright green color is the end point. Compared with the prior art, the method has the following advantages: the used reagents are wide in source and moderate in price; and the result obtained through measurement by the measuring method is high in repeatability and is accurate and effective.

Description

technical field [0001] The invention relates to the technical field of chemical component detection, in particular to a method for detecting blue absorption in montmorillonite. Background technique [0002] Montmorillonite is a hydrous layered aluminosilicate mineral, and the interlayer cations can be exchanged with monovalent cations in aqueous solution. Methylene blue is a polar molecule that produces monovalent cations in aqueous solution, can replace montmorillonite and exchange cations, and can be adsorbed in the form of a hydroxide in the alkaline medium of sodium pyrophosphate. Therefore, the dispersion Montmorillonite in aqueous solution has the ability to adsorb methylene blue, and the amount of adsorption is the amount of blue absorption. [0003] The measuring method of blue absorbing amount in existing montmorillonite is to adopt halo method, namely dropwise methylene blue standard solution in sample solution with burette under agitation, the methylene blue of a...

Claims

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Application Information

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IPC IPC(8): G01N21/78G01N31/16
CPCG01N21/78G01N31/16G01N2021/775
Inventor 张杏莉徐长跃肖俊峰张方庭杨伟春柒启恩傅心锋周通吴有林
Owner ZHANGZHOU AONONG ANIMAL HUSBANDRY TECH
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