Method for determination of scandium in bauxite by microwave digestion inductively coupled plasma atomic emission spectrometry

A technology of plasma spectroscopy and inductive coupling, which is applied in the field of analysis and determination, can solve the problems of incomplete decomposition of samples, unfavorable accurate determination of trace pits, interference with instrument stability, etc., to reduce reagent blank and matrix interference, and improve sensitivity and accuracy , The effect of reducing the amount of reagents

Inactive Publication Date: 2016-01-06
INST OF MULTIPURPOSE UTILIZATION OF MINERAL RESOURCES CHINESE ACAD OF GEOLOGICAL SCI
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Problems solved by technology

[0006] At present, there is a Chinese invention patent document with the publication number CN104111207A and the publication date being October 22, 2014, titled "a method for determining the content of active silicon in bauxite", which discloses the use of sodium hydroxide as a microwave digestion solution To decompose the bauxi...

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  • Method for determination of scandium in bauxite by microwave digestion inductively coupled plasma atomic emission spectrometry
  • Method for determination of scandium in bauxite by microwave digestion inductively coupled plasma atomic emission spectrometry
  • Method for determination of scandium in bauxite by microwave digestion inductively coupled plasma atomic emission spectrometry

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[0027] Microwave digestion inductively coupled plasma spectroscopy method for the determination of scandium in bauxite, the specific steps are as follows:

[0028] Step 1: Weigh 0.2000~0.3000g of the bauxite sample to be tested, place it in a Teflon Teflon digestion tank, and add a small amount of ultrapure water enough to wet the bauxite sample;

[0029] Step two, add 5-8mL concentrated nitric acid (HNO) to the digestion tank containing the wet bauxite sample in step one 3 ) And 1~3mL of 30% hydrogen peroxide (H 2 O 2 ), wash the bauxite sample on the inner wall of the digestion tank to the bottom of the tank and place it for 5 minutes. After the reaction is complete, add 2 to 5 mL of concentrated hydrofluoric acid (HF) and 2 to 3 mL of concentrated phosphoric acid, and gently shake Mix the fluoroethylene and Teflon digestion tank, cover the tank, equip the support, put it on the sample carousel of the microwave digestion instrument, insert the temperature sensor into the main cont...

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Abstract

The invention provides a method for determination of scandium in bauxite by microwave digestion inductively coupled plasma atomic emission spectrometry. Specifically, a sample is digested through hydrofluoric acid, nitric acid, hydrogen peroxide and phosphoric acid under the action of microwave, ultrapure water is added to a constant volume, an inductively coupled plasma emission spectrometer is employed to determine Sc so as to realize accurate determination of the trace element Sc in the bauxite sample. The method provided by the invention reduces tedious operation process, employs microwave to digest the sample and direct instrument determination, and has no need for acid removal. Compared with the traditional sample processing method, the method provided by the invention has the characteristics of simple operation steps, little reagent consumption, and rapid analysis speed. At the same time, the method employs microwave digestion to decompose the sample, and can greatly lower the reagent dosage, reduce the reagent blank and matrix interference, and improve the sensitivity and accuracy of analysis elements.

Description

technical field [0001] The invention relates to the technical field of analysis and determination, in particular to a method for determining scandium in bauxite by microwave digestion inductively coupled plasma spectrometry. Background technique [0002] Scandium is a typical scattered element, which is widely used in various high-tech fields, but because of its rare content and the difficulty of obtaining high-purity metal scandium, it is expensive. According to statistics, 90-95% of scandium in the world occurs in bauxite, phosphate rock and ferro-titanium ore; therefore scandium, as an associated valuable element in bauxite, has been more and more valued by enterprises for its comprehensive utilization, which can be Increasing the economic benefits of enterprises can also promote environmental protection. [0003] Because bauxite has strong chemical stability and often contains a small amount of corundum, it is a relatively difficult sample to handle. The traditional co...

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Application Information

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IPC IPC(8): G01N1/28G01N21/62
Inventor 易建春潘钢邵坤
Owner INST OF MULTIPURPOSE UTILIZATION OF MINERAL RESOURCES CHINESE ACAD OF GEOLOGICAL SCI
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