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Treatment method using flouroantimonic acid for digestion of trace impurity elements contained in high-purity chromic oxide

A technology of chromium trioxide and trace impurities, applied in measuring devices, material analysis through electromagnetic means, instruments, etc., can solve the problems of undetectable and unreleased impurities, so as to improve accuracy, shorten detection time, and enrich good effect

Active Publication Date: 2018-06-15
DALIAN UNIV OF TECH QINGDAO NEW ENERGY MATERIALS TECH RES INST CO LTD
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Problems solved by technology

At present, common high-purity acids cannot completely dissolve chromium trioxide, resulting in the impurity in the sample cannot be released and cannot be detected or the detection is meaningless

Method used

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Embodiment Construction

[0014] The following sections are specific implementations to further illustrate the present invention, but the following implementations are only further explanations of the present invention, and do not mean that the scope of protection of the present invention is limited to this. All equivalent replacements made based on the ideas of the present invention are included in this The scope of protection of the invention is only used to explain the invention, and cannot be understood as a limitation to the invention.

[0015] The invention provides a treatment method for fluoroantimonic acid to digest the content of trace impurity elements in high-purity chromium trioxide, which comprises the following steps:

[0016] (1) Weigh chromium trioxide in a 100ml PTFE beaker according to the actual impurity content of chromium trioxide. Parallel experiments are required;

[0017] (2) Add 2.0ml of high-purity antimony pentafluoride to the above beaker, and then slowly add 2.0ml of anhydrous hy...

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Abstract

The invention relates to the field of detection pretreatment, and in particular relates to a treatment method using flouroantimonic acid for digestion of trace impurity elements contained in high-purity chromic oxide. After the chromic oxide is digested with the high-purity flouroantimonic acid, impurities are released from crystal lattices and boundaries, non-volatile impurities are retained after high-temperature volatilization of fluorine and antimony, and non-antimony and non-chromium elements are quantified after reconstitution with nitric acid. The method has an obvious digestion effecton the chromic oxide, has a good enrichment effect on the contained impurities, facilitates use ICP-MS or ICP-AES detection, improves the accuracy of instrument detection results and shortens the detection time.

Description

Technical field [0001] The invention relates to the technical field of detection pretreatment, in particular to a processing method for fluoroantimonic acid to digest the content of trace impurity elements in high-purity chromium trioxide. Background technique [0002] Chromium trioxide is light green to dark green fine hexagonal crystals. It turns brown when hot, and turns green when cold, and the crystals are extremely hard. Amphoteric oxides are extremely stable in nature, only slightly soluble in common acids and alkalis, but insoluble in water, and there is no change even if hydrogen is passed in under red heat. [0003] High-purity chromium oxide has attracted much attention as a target preparation material. At present, common high-purity acids cannot completely dissolve chromium trioxide, resulting in impurity in the sample cannot be released and cannot be detected or the detection is meaningless. Summary of the invention [0004] The present invention aims to solve the ab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/62
CPCG01N27/62
Inventor 刘鑫业池明张磊
Owner DALIAN UNIV OF TECH QINGDAO NEW ENERGY MATERIALS TECH RES INST CO LTD
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