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Process for determining vanadium content in desulfurizing liquid

A measurement method and technology of desulfurization liquid, applied in color/spectral characteristic measurement, material analysis through observation of the influence on chemical indicators, analysis through chemical reaction of materials, etc., can solve problems such as poor stability of color developers

Inactive Publication Date: 2006-10-11
TAIYUAN UNIV OF TECH
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Problems solved by technology

The pyrogallic acid colorimetric method is used to measure the vanadium content in the extract desulfurization solution in industry, and the stability of the color developer is poor

Method used

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  • Process for determining vanadium content in desulfurizing liquid
  • Process for determining vanadium content in desulfurizing liquid
  • Process for determining vanadium content in desulfurizing liquid

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Embodiment Construction

[0021] 1) Sodium metavanadate standard solution preparation

[0022] Weigh 0.1 g of the reagent sodium metavanadate after drying at 100°C, dissolve it in a 1L volumetric flask with distilled water, dilute to the mark, and shake well. 1ml of this solution contains NaVO 3 0.1 mg.

[0023] 2) Determination of the maximum absorption wavelength of the tannic acid-vanadium complex

[0024] Measuring conditions: under normal temperature and pressure conditions, the concentration of tannic acid is 10g L -1 , sodium metavanadate concentration 0.1mg·mL -1 . Pipette 0.1mg·mL -1 NaVO 3 Put 5mL of the standard solution in a 50mL volumetric flask, add NaAC solution 5 with a mass concentration of 20%, and a volume concentration of 10% H 2 SO 4 solution 0.5mL, then add the mass concentration of 10% Na 2 SO 3 After 5mL of the solution was evenly mixed, add 10g·L -1 Tannic acid solution 10mL, dilute to the mark with distilled water, take the tannic acid solution as a blank sample, an...

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Abstract

The invention relates to a method for detecting the vanadium content of desulfurized liquid, belonging to the technique of gas desulfurize purification, which can use light split photometric method to measure the vanadium content of desulfurized liquid. It is characterized in that: it uses light split photometric method to measure the vanadium content of desulfurized liquid, while needing the raw materials as: sodium acetate, tannic acid, vitriol, sodium sulfite, and sodium metavanadate standard solution, and the needd devices comprise: spectrophotometer. The inventive method is simple which only adds one spectrophotometer, and adjusts the wavelength to 590nm, and adjust other parameters as pH valve according to the actual condition, then dilutes the desulfurize solution, draws the standard curve to make regress equation, marks the light adsorption degrees of unknown desulfurize solution, and find the vanadium content according to the standard curve. The invention has high accuracy, 100% recycled rate, and 1% relative error.

Description

technical field [0001] The invention discloses a method for measuring vanadium content in desulfurization liquid, which belongs to the field of gas desulfurization purification. technical background: [0002] Tannin extract desulfurization method is one of the most effective methods in gas purification wet desulfurization method. This method uses tannin substances and vanadium compounds in extract extract as catalysts to compound with lye to remove H in coke oven gas. 2 S. The pyrogallic acid colorimetric method is used to measure the vanadium content in the extract desulfurization solution in industry, and the stability of the color developer is poor. The measured molar absorptivity coefficient of pyrogallic acid-vanadium complex is ε=6.8×10 3 . Contents of the invention [0003] The invention is a method for measuring the content of vanadium in desulfurization liquid, the purpose of which is to disclose a kind of reagent tannic acid for the phenomenon that the stabili...

Claims

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Application Information

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IPC IPC(8): G01N21/31G01N21/78G01N21/27
Inventor 凌开成申峻黄澎盛清涛王少卿王建平
Owner TAIYUAN UNIV OF TECH
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