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A method for determining gallium in bauxite by inductively coupled plasma emission spectrometry

A technology of emission spectroscopy and plasma, which is applied in the field of determination of gallium in bauxite by plasma emission spectroscopy, can solve the problems of large matrix effect of the determination solution, long process time, and unstable results, etc., to reduce adverse effects and reduce Interference, time-saving effect

Inactive Publication Date: 2018-03-30
INST OF MULTIPURPOSE UTILIZATION OF MINERAL RESOURCES CHINESE ACAD OF GEOLOGICAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method takes a long time to process a large number of samples, and more sodium hydroxide is used in the molten ore, which makes the matrix effect of the measurement solution larger, resulting in high blank value and unstable results.

Method used

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  • A method for determining gallium in bauxite by inductively coupled plasma emission spectrometry
  • A method for determining gallium in bauxite by inductively coupled plasma emission spectrometry
  • A method for determining gallium in bauxite by inductively coupled plasma emission spectrometry

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The specific steps of this method are as follows:

[0022] In the first step, weigh 0.2000-0.3000 grams of bauxite samples into a 50mL polytetrafluoroethylene beaker, add a small amount of distilled water to shake the beaker to fully wet the minerals;

[0023] In the second step, add 5.00mL of concentrated nitric acid, 4.00mL of hydrofluoric acid and 1.00mL of concentrated sulfuric acid to the beaker containing the wetted bauxite sample in the first step, and place the beaker on a high-temperature electric heating plate to heat and decompose the sample , the heating temperature is 350 C ° ~ 360 C °, take off and cool after 3 ~ 5 minutes of sulfuric acid fume;

[0024] In the third step, add 1.00mL of concentrated phosphoric acid to the cooled beaker obtained in the second step, shake the solution in the beaker and continue heating and dissolving on a high-temperature electric heating plate. The heating temperature is 360°C. Take it off for 3 to 5 minutes after phosphor...

Embodiment 2

[0027] The specific steps of this method are as follows:

[0028] In the first step, weigh 0.2000-0.3000 grams of bauxite samples into a 50mL polytetrafluoroethylene beaker, add a small amount of distilled water to shake the beaker to fully wet the minerals;

[0029] In the second step, add 5.00mL of concentrated nitric acid, 4.00mL of hydrofluoric acid and 1.00mL of concentrated sulfuric acid into the beaker containing the wetted bauxite sample in the first step, and decompose the sample on a high-temperature electric heating plate at a heating temperature of 350 C°~360C°, after 3-5 minutes of sulfuric acid fume, remove and cool;

[0030] In the third step, add 2.00mL concentrated phosphoric acid to the cooled beaker obtained in the second step, shake the solution in the polytetrafluoroethylene beaker and continue to dissolve it on a high-temperature electric heating plate. The heating temperature is 360C°, and the period is irregular. Shake the beaker, and take it off for 3...

Embodiment 3

[0033] The specific steps of this method are as follows:

[0034] In the first step, weigh 0.2000-0.3000 grams of bauxite samples into a 50mL polytetrafluoroethylene beaker, add a small amount of distilled water to shake the beaker to fully wet the minerals;

[0035] In the second step, add 5.00mL of concentrated nitric acid, 4.00mL of hydrofluoric acid and 1.00mL of concentrated sulfuric acid into the beaker containing the wetted bauxite sample in the first step, and decompose the sample on a high-temperature electric heating plate at a heating temperature of 350 C°~360C°, after 3-5 minutes of sulfuric acid fume, remove and cool;

[0036] In the third step, add 3.00mL concentrated phosphoric acid to the cooled beaker obtained in the second step, shake the solution in the polytetrafluoroethylene beaker and continue to dissolve it on a high-temperature electric heating plate. The heating temperature is 360C°, and the period is irregular. Shake the beaker, and take it off for 3...

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Abstract

The invention relates to a method for determining gallium in bauxite through inductively coupled plasma emission spectroscopy. During treatment of a bauxite sample, the bauxite sample is pretreated by using nitric acid, hydrofluoric acid and sulfuric acid, insoluble substances are dissolved by adding phosphoric acid, then the sample is extracted by using nitric acid, thereby the bauxite sample can be thoroughly decomposed and gallium in the sample can be fully dissolved out; the entire pretreatment is performed on a high-temperature electric heating plate, cooling is performed after complete reaction, extraction is performed by using nitric acid, the volume is fixed, Y is selected as an internal standard element and gallium is determined by adopting inductively coupled plasma emission spectroscopy to obtain an ideal result; the method for determining gallium in bauxite through inductively coupled plasma emission spectroscopy has the advantages that the complex chemical reaction process and operation flow are reduced, a simple and effective acid ore dissolving system is selected, interference caused by alkali dissolving agent is reduced, and compared with a method used in YS / T575.15-2007, the accuracy is improved, the time is saved, the cost is reduced and adverse influences caused to human bodies and environments during experiments are reduced.

Description

technical field [0001] The invention relates to the technical field of analysis and testing, in particular to a method for measuring gallium in bauxite by inductively coupled plasma emission spectrometry. Background technique [0002] The average content of gallium in the earth's crust is 15×10 -6 , is a rare dispersed element, widely dispersed in nature, and its independent mineral has not been found so far, because gallium has a great similarity in chemical and crystal chemical properties, gallium often enters many components containing bauxite in a dispersed state Among them, gallium is an important material of modern high technology, and bauxite is one of the important sources of gallium. Therefore, it is of great significance to establish an analytical method for accurately determining the content of trace element gallium in bauxite. The main components of bauxite are aluminum and silicon. The key to the analysis and determination of gallium in bauxite lies in how to d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/68
Inventor 潘钢刘卫李刚易建春绍坤
Owner INST OF MULTIPURPOSE UTILIZATION OF MINERAL RESOURCES CHINESE ACAD OF GEOLOGICAL SCI