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High-purity iron oxide red powder content detection method

A detection method, the iron oxide red technology, is applied in the direction of chemical analysis by titration method, which can solve the problems of large environmental pollution and achieve the effect of high titration accuracy

Inactive Publication Date: 2019-08-09
江苏华东耀皮玻璃有限公司
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  • Application Information

AI Technical Summary

Problems solved by technology

For the determination of red powder with a purity of more than 95%, the traditional potassium dichromate method is often used, but this method uses highly toxic mercuric chloride solution, and the waste liquid is relatively polluting to the environment.

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Embodiment Construction

[0020] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to define the protection scope of the present invention more clearly.

[0021] see figure 1 ,

[0022] Embodiments of the invention include:

[0023] Take the samples that have been accurately calibrated for purity and test them separately according to the following methods:

[0024] Detection method one: a detection method of high-purity iron oxide red powder, the detection method of high-purity iron oxide red powder comprises the following steps:

[0025] Step 1 Weigh 0.1000g red powder,

[0026] Step 2 Add the iron oxide red powder to be tested into 1:1 hydrochloric acid and boil to dissolve.

[0027] Step 3 Add 2% stannous chloride dropwise to the acid-dissolved system until the system turns light yellow,

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Abstract

The invention discloses a detection method for high-purity iron oxide red powder. The detection method for the high-purity iron oxide red powder is a potassium dichromate method and includes the following steps of: sampling; hydrochloric acid dissolution; titanium tetrachloride reduction; adding potassium dichromate dropwise to a phosphoric and sulfuric acid medium to carry out oxidization until reaching an end point; and data processing. According to the reduction end point, sodium tungstate is adopted as an indicator; according to the oxidization, sodium diphenylaminesulfonate is adopted asan indicator; and acid dissolution is carried out under the condition of boiling; excessive titanium chloride is removed through the potassium dichromate. The method has the advantages of simplicity,efficiency, high reaction sensitivity and fewer toxic substances, and can accurately measure the purity of the iron oxide red powder.

Description

technical field [0001] The invention relates to the field of glass colorants, in particular to a method for detecting the content of high-purity iron oxide red powder. Background technique [0002] Iron oxide red powder is a commonly used colorant in glass production. The purity of the red powder has a very obvious impact on the coloring quality of the glass. Therefore, it is necessary to measure the purity of the iron oxide red powder before using it. The detection method for iron is potassium dichromate. Titration, 1,10-phenanthroline photometry, thiocyanate photometry, EDTA-H 2 o 2 Photometry. The traditional potassium dichromate method is often used for the determination of red powder with a purity of more than 95%, but this method uses highly toxic mercuric chloride solution, and the waste liquid is relatively polluting to the environment. Contents of the invention [0003] The technical problem mainly solved by the present invention is to use titanium trichloride ...

Claims

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Application Information

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IPC IPC(8): G01N31/16
CPCG01N31/16
Inventor 徐峥
Owner 江苏华东耀皮玻璃有限公司