Method for determining content of bismuth in iron ores by hydride generation-atomic fluorescence spectrometry method

An atomic fluorescence spectrometry, hydride generation technology, applied in fluorescence/phosphorescence, material excitation analysis, etc., can solve the problems of using many reagents, long process, cumbersome operation process, etc., and achieve the effect of simple operation, great harm, and cumbersome operation.

Inactive Publication Date: 2014-01-29
INNER MONGOLIA BAOTOU STEEL UNION
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  • Abstract
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Problems solved by technology

The whole operation process is cumbersome, the operating conditions are strict, and the process is long. It takes at least 16 hours to analyze a sample, and many reagents are used. The measurement range is 0.0020-0.200%

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  • Method for determining content of bismuth in iron ores by hydride generation-atomic fluorescence spectrometry method

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Embodiment Construction

[0027] The general idea of ​​the present invention is: melt and decompose the iron ore sample with sodium peroxide and sodium hydroxide, acidify it with dilute hydrochloric acid, then use ascorbic acid and thiourea to reduce the high-priced bismuth to low-priced bismuth, and at the same time mask the coexisting elements to eliminate the influence , to obtain the sample solution of iron ore; the sample solution is introduced into the atomic fluorescence photometer, and under the action of potassium borohydride, the bismuth is converted into bismuth hydrogen gas, which is sent to the quartz atomizer by the carrier gas, and then emitted after fully atomized The characteristic fluorescence spectrum is obtained, and the fluorescence measurement is carried out; the content of bismuth in the sample solution is obtained according to the fluorescence intensity measured by the bismuth standard solution of known concentration.

[0028] In the embodiments of the present invention, the reag...

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Abstract

The invention discloses a method for determining the content of bismuth in iron ores by a hydride generation-atomic fluorescence spectrometry method. The method comprises the following steps of preparing a sample solution and a blank solution of an iron ore sample, and preparing a bismuth standard solution; introducing the blank solution into an atomic fluorescence spectrophotometer, and determining the fluorescence intensity of the bismuth in the blank solution; introducing the sample solution into the atomic fluorescence spectrophotometer after blank value compensation, determining the fluorescence intensity of the bismuth in the sample solution, and acquiring the content of the bismuth in the sample solution according to the fluorescence intensity measured by the bismuth standard solution with known concentration. The content of the bismuth in the iron ores can be determined rapidly and accurately by utilizing the technical scheme provided by the invention.

Description

technical field [0001] The invention relates to the technical field of iron and steel metallurgical analysis, in particular to a method for determining bismuth content in iron ore by hydride generation-atomic fluorescence spectrometry. Background technique [0002] Bismuth is a harmful impurity element in steel. It is easy to segregate in steel, causing brittleness of steel, reducing the thermal toughness and plasticity of steel, and causing cracks in stainless steel extruded materials. Bismuth in steel is mainly brought in by ore and other raw materials. Therefore, Determination of bismuth content in iron ore is very important. [0003] At present, the content of bismuth in iron ore is determined by the "dithiodiantipyridine methane spectrophotometric method". This method analyzes the residue after acid treatment, and manganese dioxide is used as a carrier to co-precipitate bismuth. After filtration, the precipitate is dissolved and concentrated by heating. , hair color, c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/64
Inventor 卢艳蓉
Owner INNER MONGOLIA BAOTOU STEEL UNION
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