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Sample treatment method for testing chloride ions in cement through ion selective electrode method

An ion selectivity and sample processing technology, applied in the preparation of test samples, etc., can solve problems such as electrode membrane poisoning, improve repeatability and accuracy, and prolong service life.

Inactive Publication Date: 2014-02-19
ANHUI WAYEE SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the problem of the ion-selective electrode itself, its electrode is easily polluted by a large number of chemical substances in the test sample, causing the electrode membrane to be poisoned and cannot be used. Therefore, we need to find a way to remove the anions and cations that damage the counter electrode membrane in the sample solution. remove or mask its interference

Method used

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  • Sample treatment method for testing chloride ions in cement through ion selective electrode method
  • Sample treatment method for testing chloride ions in cement through ion selective electrode method
  • Sample treatment method for testing chloride ions in cement through ion selective electrode method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Ion-selective electrode method measures the sample processing method of chloride ion in cement, comprises the following steps:

[0023] (1) Weigh 2.000-3.000 grams of dry cement sample and add it into a 100mL glass beaker.

[0024] (2) Measure 40ml of the acidic extract and add it to the beaker containing the sample, let it rest for 5 minutes to complete, and take out the chloride ions.

[0025] (3) Mix the fully reacted sample solution, add 40ml CISA solution, and stir the solution with a glass rod to mask the interfering ions.

[0026] (4) After the reaction is complete, adjust the pH value of the sample solution, and add a pH regulator dropwise to the sample solution, so that the pH value of the solution is between 5-10.

[0027] (5) Let the sample solution rest for 5 minutes, and measure the temperature of the solution. When the temperature is consistent with the temperature of the standard solution, insert the composite chloride ion selective electrode on the chlo...

Embodiment 2

[0028] Embodiment 2: concrete experimental test of the present invention:

[0029] 1.1 Instruments and reagents

[0030] Composite chloride ion selective electrode (Jiangsu Jiangfen Instrument Co., Ltd.)

[0031] Electronic balance (Beijing Sartorius Balance Co., Ltd.)

[0032] PH test paper PH range (5--10) (Hangzhou Special Paper Co., Ltd.)

[0033] PH / MV meter (Shanghai Precision Scientific Instrument Co., Ltd.)

[0034] Ultrapure water machine (Anhui Wanyi Technology Co., Ltd.)

[0035] Potassium Hydroxide (Sinopharm Reagent) Potassium Bromate (Sinopharm Reagent) Nitric Acid (Sinopharm Reagent)

[0036] Sodium Chloride Standard Reagent (Sinopharm Reagent)

[0037] The above chemical reagents are of superior grade

[0038] 1.2 Reagent configuration

[0039] Preparation of acid-soluble extract: Measure 37ml of purified water and 3ml of concentrated nitric acid into a 100ml beaker for later use.

[0040] Acidity regulator: take by weighing 40 grams of high-grade pure ...

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Abstract

The invention discloses a sample treatment method for testing chloride ions in cement through an ion selective electrode method. The method adopts a CISA solution for being directly mixed with an acid-soluble sample, and can be used for eliminating interferences of hydroxide ions, ammonia water, thiosulphate ions, bromide ions, sulfide ions, iodide ions, cyanide ions and the like, improving the test repeatability and accuracy, protecting a membrane of a chloride ion selective electrode to the maximum extent and prolonging the service life of the electrode. Therefore, the method for testing the chloride ion content through the ion selective electrode method by adding the CISA solution is suitable for testing cement materials with complex base body ingredients and also is suitable for testing the content of chloride ions in other building materials.

Description

technical field [0001] The invention relates to element detection of building raw materials, in particular to a sample processing method for determining chloride ions in cement by an ion selective electrode method. Background technique [0002] With the development of urban construction, a large number of buildings have been produced, and a large number of buildings are reinforced concrete buildings, and chloride ions are an important factor that induces corrosion of steel bars. In order to avoid premature corrosion of steel bars, it is necessary to detect the raw materials used in concrete. Chloride ion content, and my country has also promulgated the limit requirements and testing standards for chloride ion content in various concrete raw materials. The cement raw material is the most important raw material for concrete, and its usage is quite large. Therefore, excessive chloride ions in concrete can be avoided in advance by checking the chloride ion content in cement raw ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28
Inventor 李涛高美丽周宇
Owner ANHUI WAYEE SCI & TECH CO LTD
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