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Method for continuously detecting content of sulfite and sulfide in building material and geological material

A technology of sulfite and geological materials, applied in the direction of material separation, material analysis, measuring devices, etc., can solve the mutual interference between sulfite and sulfide, and cannot determine the content of sulfite and sulfide by iodometric method, etc. question

Active Publication Date: 2013-04-24
CHINA TEST & CERTIFICATION INT GRP CO LTD
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Problems solved by technology

[0003] At present, the determination of sulfite and sulfide content in building materials generally adopts the iodometric method, such as the determination method of sulfide content recorded in GB / T176-2008 "Cement Chemical Analysis Methods", JC / T2074-2011 "Flue Gas The determination method of calcium sulfite hemihydrate content recorded in "Desulfurized Gypsum", but the above method has the problem of mutual interference between sulfite and sulfide. In fact, the total amount of sulfite and sulfide is measured, which is only suitable for different The determination of sulfite in sulfide-containing materials or the determination of sulfide in materials without sulfite. For materials where sulfite and sulfide coexist (such as gypsum, etc.), the iodometric method cannot be used content and sulfide content were determined separately

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  • Method for continuously detecting content of sulfite and sulfide in building material and geological material
  • Method for continuously detecting content of sulfite and sulfide in building material and geological material
  • Method for continuously detecting content of sulfite and sulfide in building material and geological material

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Embodiment 1

[0115] Embodiment 1, measure sulfite and sulfide content in building material and geological material

[0116] In this embodiment, taking desulfurized gypsum as an example, the method of the present invention and the special device for sample processing are used to complete the determination of sulfite and sulfide content in the sample, and specifically perform the following operations:

[0117] 1. Sample processing

[0118] Fully grind the desulfurized gypsum in an agate mortar until there is no obvious graininess, fully dry it in an oven at 45±3°C and then cool it in a desiccator, weigh 0.3012g (m) of the dried sample, and put the sample into In the double-necked round-bottomed flask 1 in the special device for sample processing, unscrew the knob of the separating funnel 2, and add the treatment solution (the treatment solution is hydrochloric acid and chlorinated chlorinated acid) in the 100mL double-necked round-bottomed flask 1. The mixed solution of tin solution, in whi...

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Abstract

The invention discloses a method for continuously detecting content of sulfite and sulfide in a building material and a geological material. The method comprises the following steps of: collecting a sample of the building material or the geological material, dissolving the sample together with hydrochloric acid and stannous chloride in a closed container, taking out released sulfur dioxide and hydrogen sulfide by using highly pure nitrogen or argon airflows, absorbing by using sodium hydroxide or potassium hydroxide solution, detecting the concentration of sulfite ions generated in the absorbed solution by using ion chromatography, thus obtaining the content of the sulfite through calculation; and oxidizing the absorbed solution by using hydrogen peroxide, wherein both the sulfite and the sulfide are oxidized into sulfate, detecting the concentration of sulfate ions by using the ion chromatography, and then obtaining the content of the sulfide by the measured concentration of the sulfate ions and the measured concentration of the sulfite ions through the calculation (subtraction method). The method plays an important role in detecting the content of the sulfite and that of the sulfide in the building material and the geological material, and the application prospect is brilliant.

Description

technical field [0001] The invention belongs to the field of material analysis, and relates to a method for determining the content of sulfite and sulfide in building materials and geological materials in the fields of building material inspection and geological inspection. The method can be specifically used for building materials such as gypsum and gypsum products, cement, and sand , and continuous determination of sulfite and sulfide content in geological materials such as soil and sludge. Background technique [0002] In many building materials, sulfur trioxide content is an important indicator that needs to be tested. Various cement, sandstone, fly ash, silica fume, gypsum, and concrete admixture products all have limit requirements for sulfur trioxide. The determination of sulfur trioxide in the current standard method generally adopts the hydrochloric acid solution gravimetric method, such as the determination method recorded in GB / T176-2008 "Methods for Chemical Anal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02G01N30/06
Inventor 郭中宝徐丹华袁庆丹梅一飞马振珠白永智崔金华王明玉赵文燕
Owner CHINA TEST & CERTIFICATION INT GRP CO LTD
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