Method for automatic detection of montmorillonite content
An automatic detection, montmorillonite technology, applied in the preparation of test samples, measurement of color/spectral characteristics, instruments, etc., can solve problems such as inaccurate results, and achieve accurate results.
Inactive Publication Date: 2018-02-09
内蒙古和正美生物科技有限公司
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Let the excess methylene blue be fully absorbed by the sample, then measure the absorbance produced by the remaining methylene blue in the solution, and then check the content of montmorillonite from the standard curve made by the standard montmorillonite sample. Water evaporates during the process, making the results inaccurate
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[0022] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be further described below.
[0023] A kind of montmorillonite content automatic detection method adopts following steps,
[0024] 1. Prepare a 0.00500 mol / L methylene blue solution: weigh 1.5995 g of a reagent methylene blue with a purity ≥ 99.9% without crystal water, dissolve it in 1000 ml of water, and set to volume;
[0025] 2. Prepare 1% sodium pyrophosphate solution: 10g of analytically pure sodium pyrophosphate, set the volume in a 1000ml volumetric flask, shake well, wait until completely dissolved, and let it stand still for 24 hours before use;
[0026] 3. Sample treatment: Dry and grind the montmorillonite sample finely, pass through a 200-mesh sieve and then dry to obtain sample powder;
[0027] 4. Weigh 50ml of distilled water into the conical flask with a measuring cylinder, then accurately weigh 0.2000-0.2050g of sample powder, accurate to 0.0000g, put it into the conical flask...
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The invention discloses a method for automatic detection of montmorillonite content, and the method comprises the following steps: 1), preparing a methylene blue solution of 0.00500mol / L; 2), preparing a sodium pyrophosphate solution of 1%; 3), performing sample processing; 4), weighing 50ml of distilled water with a measuring cylinder into a conical flask, then accurately weighing 0.2000-0.2050gof a sample powder into the conical flask with 50ml of distilled water, and shaking uniformly; 5), adding 20ml of the prepared sodium pyrophosphate solution into the conical flask with a liquid filling device as a dispersant and shaking uniformly and continuously; 6), placing the conical flask on an electric furnace to boil slightly for 4-5min, taking down the conical flask and cooling to the roomtemperature to obtain a sample liquid to be detected; 7), preparing for determination; 8) performing checking; 9), performing automatic determination. The method provided by the invention is more accurate to determine the end point of titration, and a computer program is adopted for automatic determination, so that the result is more accurate.
Description
technical field [0001] The invention relates to a detection method for montmorillonite content, in particular to an automatic detection method for smectite content. Background technique [0002] In recent years, with the development and wide application of montmorillonite, the requirements for the quality content of montmorillonite have been continuously improved. At present, there are mainly two methods for judging the content of montmorillonite: blue absorption and X-ray diffraction quantitative analysis. The key of the blue absorption method lies in the determination of the titration end point. The halo method or the spectrophotometric method is usually used to determine the titration end point. The halo method is easy to operate and the instrument is simple. Use the eyes to observe the blue ring to determine the end point. The size of the blue ring varies greatly due to human judgment. At the same time, the end point is judged by taking liquid and observing, resulting in...
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IPC IPC(8): G01N35/00G01N21/78G01N21/31G01N1/28G01N1/38G01N1/44
Inventor 齐国友李阳
Owner 内蒙古和正美生物科技有限公司