Cobalt ion test paper based on nanoscale zinc sulfide, preparation method thereof and test method

A technology of nano-zinc sulfide and detection test paper, which is applied in the field of cobalt ion detection, can solve problems such as high price and inability to achieve quantitative analysis, and achieve the effects of low cost, rapid qualitative and semi-quantitative detection, and quantitative detection.

Inactive Publication Date: 2017-05-17
YUNNAN UNIV
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  • Application Information

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Problems solved by technology

At present, the cobalt ion detection test papers sold in the domestic market are all imported from Macherey-Nagel in Germany. Their products are expensive, and the price per 100 test papers exceeds RMB 500, and the test can only determine the concentration range of cobalt ions in water, and cannot be quantified. analyze

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  • Cobalt ion test paper based on nanoscale zinc sulfide, preparation method thereof and test method
  • Cobalt ion test paper based on nanoscale zinc sulfide, preparation method thereof and test method
  • Cobalt ion test paper based on nanoscale zinc sulfide, preparation method thereof and test method

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preparation example Construction

[0021] A preparation method based on nano-zinc sulfide cobalt ion detection test paper, comprising the following steps:

[0022] 1) Preparation of zinc sulfide nanoparticle dispersion: Dissolve zinc salt and sodium sulfide with a molar ratio of 0.25~4:1 in deionized water respectively to obtain zinc salt solution and sodium sulfide solution; heat the zinc salt solution to 60~100 ℃, then add thioglycolic acid dropwise, and continue stirring for 20-40 min, the volume ratio of thioglycolic acid to zinc salt solution is 0.01-0.1:1; then add sodium sulfide solution dropwise, and continue stirring for 60-150 min Post-cooling to obtain a zinc sulfide nanoparticle dispersion;

[0023] 2) Preparation of test paper: Soak the adsorption layer in the zinc sulfide nanoparticle dispersion obtained in step (1) for 1-10 min, fully infiltrate, then remove the soaked adsorption layer, and dry to obtain cobalt ion detection test paper.

[0024] The zinc salt described in step (1) is one or more...

Embodiment 1

[0039] A preparation method based on nano-zinc sulfide cobalt ion detection test paper, comprising the following steps:

[0040] 1) Preparation of zinc sulfide nanoparticle dispersion: Dissolve zinc acetate and sodium sulfide with a molar ratio of 1:1 in deionized water to obtain zinc acetate solution and sodium sulfide solution; heat the zinc acetate solution to 80°C, then drop Add thioglycolic acid and continue to stir for 30 min. The volume ratio of thioglycolic acid to zinc acetate solution is 0.05:1; then add sodium sulfide solution dropwise, continue stirring for 120 min and then cool to obtain a zinc sulfide nanoparticle dispersion; The zinc sulfide nanoparticle dispersion is detected, and the X-ray diffraction pattern is obtained as figure 1 shown and transmission electron micrographs as figure 2 shown;

[0041] 2) Preparation of test paper: soak the adsorption layer in the zinc sulfide nanoparticle dispersion liquid obtained in step (1) for 1 min, fully infiltrate,...

Embodiment 2

[0043] A preparation method based on nano-zinc sulfide cobalt ion detection test paper, comprising the following steps:

[0044] 1) Preparation of zinc sulfide nanoparticle dispersion: Dissolve zinc salt and sodium sulfide with a molar ratio of 4:1 in deionized water to obtain zinc salt solution and sodium sulfide solution; heat the zinc salt solution to 100°C, then drop Add thioglycolic acid and continue to stir for 40 min. The volume ratio of the thioglycolic acid to the zinc salt solution is 0.1:1; then add the sodium sulfide solution dropwise, continue stirring for 150 min and then cool to obtain a zinc sulfide nanoparticle dispersion; Described zinc salt is zinc nitrate;

[0045] 2) Preparation of test paper: Soak the adsorption layer in the zinc sulfide nanoparticle dispersion liquid obtained in step (1) for 10 minutes, fully infiltrate, then take out the soaked adsorption layer, and dry to obtain cobalt ion detection test paper; the adsorption The first layer is lens cle...

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Abstract

The invention discloses a cobalt ion test paper based on nanoscale zinc sulfide, a preparation method thereof and a test method. The preparation method for the cobalt ion test paper based on nanoscale zinc sulfide includes the following steps: (1) preparation of a zinc sulfide nanoparticle dispersant: zinc salt and sodium sulfide, the molar ratio of which is (0.25 to 4) to 1, are respectively dissolved in deionized water, so that a zinc salt solution and a sodium sulfide solution are obtained; the zinc salt solution is heated to 60 DEG C to 100 DEG C, and then added with mercaptoacetic acid dropwise, the mixture is stirred for 20 to 40 minutes, and the volume ratio of mercaptoacetic acid to the zinc salt solution is (0.01 to 0.1) to 1; the sodium sulfide solution is then added dropwise, and after 60 to 150 minutes of continued stirring, the zinc sulfide nanoparticle dispersant is obtained by cooling; (2) production of a test paper: an adsorption layer is immersed in the zinc sulfide nanoparticle dispersant obtained in Step (1) and sufficiently soaked, the soaked adsorption layer is then taken out and dried, and thereby the cobalt ion test paper is obtained.

Description

technical field [0001] The invention belongs to the technical field of cobalt ion detection, and in particular relates to a cobalt ion detection test paper based on nanometer zinc sulfide, a preparation method and a detection method thereof. Background technique [0002] Cobalt is a group VIII element in the fourth period, and is an important industrial metal material for the production of heat-resistant alloys, hard alloys, anti-corrosion alloys, and magnetic alloys. At the same time, due to the rich valence and catalytic properties of cobalt, cobalt-based compounds (such as cobalt oxide, cobalt hydroxide, lithium cobaltate, etc.) Widespread concern. It is foreseeable that cobalt-based materials will play an increasingly important role in the future life of human beings. However, excessive intake of cobalt will have toxic effects on the human body, causing pneumonia, asthma, cardiomyopathy, goiter, and gastrointestinal disorders. In addition, cobalt poisoning may also in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/78
CPCG01N21/78
Inventor 王毓德刘旭杨燕邢欣欣
Owner YUNNAN UNIV
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