Method for measuring contents of anionic surface active substances by methylene blue spectrometry
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A surface active material, methylene blue technology, applied in the direction of color/spectral property measurement, etc., to achieve the effect of good reproducibility, stable absorbance and low cost
Inactive Publication Date: 2012-08-15
QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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Problems solved by technology
Due to the limitation of salt concentration and the influence of interfering ions, the existing analysis methods cannot use
At present, there is no mature method suitable for the determination of the content of anionic surface active substances in solid alkali metal salts, alkaline earth metal salts or alkaline earth metal hydroxides.
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Embodiment 1
[0041] Capacity bottle 25ml, 50ml
[0042] Implip 10ml
[0043] The balance of the balance of 220g, the sensor 0.1mg
[0044] Acidal meter accuracy ± 0.01
[0045] UV-Visible Lighting Optimization of Optical accuracy ± 0.002ABS
[0046] 2. Reagent
[0047] Armor blue test agent analysis pure
[0048] Sodium sodium sulfate analysis pure
[0049] Sodium acetate analysis pure
[0050] Pure ice acetic acid analysis
[0051] Ethanol analysis pure
[0052] 3. Experimental steps
[0053] (1) Dissan sample: Accurately referred to as a magnesium carbonate that does not contain sodium sodium sodium sulfate, and 2.5649g each of the alkaline -type magnesium carbonate sample containing sodium sodium sulfate, the quality error of the two samples is controlled at 0.2 mg of 0.2 mgInside.With a 35 % concentration of nitric acid solution solution, the solution processes are performed in a closed container, and the solution with a concentration of alkaline magnesium carbonate is 0.129mol / L.
[0054] (...
Embodiment 2
[0076] Same as Examples
[0077] 2. Reagent
[0078] Sodium sodium sodium sulfate is replaced with potassium hydrogenate (benchmarks) of phthalate, and other examples are the same as the embodiment 1.
[0079] 3. Experimental steps
[0080] (1) Dissan sample: Accurately referred to as a magnesium carbonate that does not contain potassium hydrogen acid hydrogenate, and 2.5649g of alkali carbonate samples containing hydrogen carbonate containing pyrodiamate, the quality error of the two samples is controlled within 0.2 mgEssenceUse a 35 % nitrate solution for soluble samples, and the solution process is performed in a closed container, which is prepared into a solution with a concentration of 0.129mol / L.
[0081] (2) Preparation of sodium acetate-sodium acetate buffer: Same as Example 1.
[0082] (3) Preparation of Armo -based blue solution: Same as Example 1.
[0083] (4) Preparation of potassium hydrogen acid hydrogenate: 0.1021g of potassium hydrogen acid hydrogenate, dissolved w...
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Abstract
The invention discloses a method for measuring contents of anionic surface active substances in alkali metal salts, alkaline-earth metal salts or alkaline-earth metal hydroxides by a methylene blue spectrometry, which comprises the following steps: using nitric acid water solution to dissolve out the anionic surface active substances in the solid alkali metal salts, and preparing 0.1 to 0.5 mol / Lsolution; adding methylene blue solution into the solution, adjusting the pH of the solution to between 4.6 and 5.0 by using acetic acid and sodium acetate buffer solution; measuring the absorbency of the solution by a spectral photometer; after the absorbency A of the solution is deducted from blank absorbency Ao, forming a linear relation with the content of a complex compound formed by the reaction of the anionic surface active substances and the methylene blue in the solution; and obtaining the contents of the anionic surface active substances in the solution through a standard curve, and then obtaining the contents of the anionic surface active substances in the solid alkali metal salts, the alkaline-earth metal salts or the alkaline-earth metal hydroxides through conversion. The experimental cost of the analysis method is low, the analysis operation is simple, and the repeatability of the analysis result is good.
Description
Technical field [0001] The present invention is the field of chemical analysis technology, which involves a method of using the optical metal salt, alkaline soil metal salt, and alkaline soil metal hydroxide, which adopts the method of measurement.Methods of metal salt, alkaline earth metal salt or alkaline soil metal metal hydroxide surface active substance content. Background technique [0002] In the preparation of hydroxides of solid alkaline metal salt, alkaline soil salt, or alkaline soil metal, in order to control the crystallization process, product appearance and particle size distribution, product gathering status and surface nature, additives should often be added to the preparation system.The additives used are mainly surface active substances. The products obtained often contain a certain amount of additives. In order to regulate and control the preparation process and product quality, they understand the alkali metal salt, alkaline soil salt or alkaline soil metal ...
Claims
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Application Information
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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/31
Inventor 郭敏吴志坚李权刘海宁叶秀深卿彬菊葛飞
Owner QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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