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Method for determining fluorine content in gypsum and silica

A technology of fluorine content and silica, applied in the direction of material electrochemical variables, etc., can solve the problems of cumbersome steps and long time consumption, and achieve the effect of accurate analysis results, simple operation and fast measurement speed

Inactive Publication Date: 2019-04-09
BAOTOU IRON & STEEL GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For gypsum and silica containing trace amounts of manganese, the method steps are cumbersome and time-consuming. There is an urgent need for a more convenient and simple method with fast determination speed and less interference to determine a small amount of fluorine content in gypsum and silica.

Method used

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  • Method for determining fluorine content in gypsum and silica
  • Method for determining fluorine content in gypsum and silica

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Weigh gypsum (GBW01309a), silica (YSBC28762-95), silica 1# (93-26), gypsum 1#, 2# samples, silica 3#, 4# samples and measure them according to the above method. The results are shown in Table 1.

[0042] Table 1: Measurement results of standard samples

[0043]

[0044]

Embodiment 2

[0046] Weigh gypsum (GBW01309a), silica (YSBC28762-95), silica 1# (93-26) and gypsum 1#, 2# samples, silica 3#, 4# samples, add F standard solution respectively; Respectively 0.010%, 0.05%, 0.100%, 0.020%, 0.200%, 1.00%, 0.500%, measured according to the above method, the results are shown in Table 2.

[0047] Table 2: Determination results of standard sample spiked recovery

[0048] sample

[0049] Through the verification of the above implementation examples, it can be seen that the method of the present invention is used for the determination of low-content fluorine in gypsum and silica, and the range of the analysis method can reach 0.01 at to 1.00 at%, which expands the lower limit of detection and is more suitable for the determination of gypsum and silica. Low to medium content of fluorine element. The analytical method has high precision and high accuracy. The method is fast and simple, and can be popularized and used in production.

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Abstract

The invention provides a method for determining fluorine content in gypsum and silica. The method does not require ethanol to eliminate manganese, and uses alizarin S as an indicator, acetic acid-sodium acetate-sodium citrate-sodium chloride as a total ionic strength regulator. A fluoride ion selective electrode method is used to determine low levels of fluorine in gypsum and silica. The method can not only adjust the acidity and the ionic strength of the solution, but also mask the elements such as iron and aluminum in the solution. The method has high sensitivity, fast measurement speed, simple operation and small interference compared with other methods, and has good selectivity, which can provide accurate data.

Description

technical field [0001] The invention belongs to the technical field of metallurgical analysis, and in particular relates to an analysis method which uses sodium hydroxide and sodium peroxide to decompose a sample and uses a fluoride ion selective electrode to measure the fluorine content in a sample solution. Background technique [0002] Gypsum and silica are important industrial materials. So far, there is no report on the analysis method of fluorine content in gypsum and silica. Xiao Fang et al studied the method of determining the fluorine content in ore samples in "Mixed Alkali Fusion-Ion Selective Electrode Method for Determination of Fluorine in Iron Ore". , Ethanol to eliminate the color of manganese, using sodium citrate dihydrate-potassium nitrate as a total ionic strength regulator, bromocresol green as an indicator, and fluorine ion selective electrode method to determine fluorine in iron ore. For gypsum and silica containing trace amounts of manganese, the ste...

Claims

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Application Information

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IPC IPC(8): G01N27/26
CPCG01N27/26
Inventor 卢艳蓉王倩
Owner BAOTOU IRON & STEEL GRP
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