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
CN108318481AInactive Publication Date: 2018-07-24ZHANGZHOU AONONG ANIMAL HUSBANDRY TECH +2
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
ZHANGZHOU AONONG ANIMAL HUSBANDRY TECH
Publication Date
2018-07-24
Estimated Expiration
Not applicable · inactive patent

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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.
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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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