Treatment method of trace impurity element content in high-purity chromium trioxide digested by fluoroantimonic acid

A technology of chromium trioxide and trace impurities, which is applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems that impurities cannot be released and cannot be detected, and achieve the effects of shortening detection time, improving accuracy, and good enrichment effect

Active Publication Date: 2020-04-10
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 part is a specific implementation to further explain the present invention, but the following implementation is only a further explanation of the present invention, and does not mean that the scope of protection of the present invention is limited to this, and all equivalent replacements based on the ideas of the present invention are included in this document. The scope of protection of the invention is only used to explain the present invention, but should not be construed as a limitation of the present invention.

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

[0016] (1) according to the actual impurity content of chromium sesquioxide, take chromium sesquioxide in 100ml PTFE beaker, need to do parallel experiment;

[0017] (2) Add 2.0ml of high-purity antimony pentafluoride into the above beaker, and then ...

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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 treatment method for the content of trace impurity elements in high-purity chromium trioxide digested by fluoroantimonic acid. 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, insoluble in water, and there is no change even when hydrogen gas is introduced under red heat. [0003] High-purity chromium trioxide has attracted much attention as a target preparation material. 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. Contents of the invention [0004] The present inventio...

Claims

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Application Information

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Patent Type & Authority Patents(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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