A kind of dual-channel copper ion detection test paper and preparation method thereof

A copper ion detection and copper ion technology, which is applied in the field of chemical analysis, can solve the problems of complex preparation of color selectors and large color selectors, and achieves the effects of low cost, fast analysis speed and simple preparation.

Active Publication Date: 2020-11-27
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Application Nos. 200810106412.8, 200910094252.4, 201610520369.4 and other Chinese patents disclose some copper ion detection test papers and their preparation methods. Some test papers use a large amount of color selection agent, and some test papers require multiple color selection agents to be used in combination. The preparation is complicated. In general, these patents are based on colorimetric methods to determine copper ions, and there is still much room for improvement in sensitivity and accuracy.

Method used

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  • A kind of dual-channel copper ion detection test paper and preparation method thereof
  • A kind of dual-channel copper ion detection test paper and preparation method thereof
  • A kind of dual-channel copper ion detection test paper and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0036] Embodiment 1, the preparation of compound formula I

[0037] The compound BPA (0.1g, 0.248mmol), TCF (0.064g, 0.321mmol) and ammonium acetate (1mg, 0.013mmol) (the ratio of the three 1:1.3:0.05) was added to ethanol (1mL) and dichloromethane (0.8 mL) in a mixed solvent (ratio 1:0.8) at 25°C for 8 hours. After the reaction, dichloromethane and water were added for extraction and separation, the collected organic phase was dried with anhydrous sodium sulfate, and the solvent was spin-dried, and separated and purified by silica gel column chromatography, and the eluting agent was dichloromethane. 98 mg of the compound of formula I was obtained, and the yield was 81%.

[0038] The proton nuclear magnetic spectrum, carbon nuclear magnetic spectrum and mass spectrometry detection data of product formula I compound are as follows: 1 H NMR (400MHz, CDCl 3 )δ[ppm]: 8.62(d, J=4Hz, 2H), 7.67(t, J=8Hz, 2H), 7.58(d, J=16Hz, 1H), 7.49(d, J=12Hz, 2H), 7.27-7.20(m,4H),6.82(d,J=12Hz...

Embodiment 2

[0039] Embodiment 2, the aqueous solution of compound formula I is to the dual-channel detection of copper ion

[0040] The compound formula I was dissolved in water, and a solution with a concentration of 10 μmol / L was prepared. Take a series of each 3mL of this solution, then add 2 times the equivalent of different kinds of metal ions respectively, and test the UV-Vis absorption spectrum of each test solution (as attached figure 1 (a)) and fluorescence spectra (as attached figure 2 (a) shown). And directly take pictures of each solution (as attached figure 1 Shown in (b)) to see the color change; then in a dark place, under the illumination of a portable ultraviolet lamp, take a picture of the fluorescence change of the solution (as attached figure 2 (b) shown).

[0041] from figure 1 (b) It can be seen that only copper ions can make the color of the formula I solution turn yellow from lavender, and the addition of other metal ions has no effect on the color of the solu...

Embodiment 3

[0042] Embodiment 3, the preparation of dual-channel copper ion detection test paper

[0043] Dissolve formula I in acetone, prepare 1mmol / L chromogenic solution; cut the qualitative filter paper into strips of 1cm×4cm; then immerse the strip in the chromogenic solution for 1 minute, take it out and put it on a watch glass After drying, the dual-channel copper ion detection test paper is obtained.

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Abstract

The invention discloses a two-channel copper ion detection test paper and a production method thereof. The two-channel copper ion detection test paper comprises a color developing plate and a color developing substance on the color developing plate, and the color developing substance is a compound of formula I shown in the description. The copper ion detection test paper is simple to produce, thecolor developing substance simultaneously changes color and fluorescence obviously after meeting copper ions, and the signal changes of color matching and the fluorescence can be simultaneously observed with naked eyes and a portable ultraviolet lamp, so the selectivity and the sensitivity are higher than those of single colorimetry or single fluorescence methods. The two-channel copper ion detection test paper is especially suitable for onsite water quality analysis, and has the advantages of low cost, fast analysis speed, and accuracy in analysis.

Description

technical field [0001] The invention relates to the technical field of chemical analysis, in particular to a double-channel test paper for detecting the concentration of divalent copper ions in water and a preparation method thereof. Background technique [0002] Copper plays a very important physiological role in many biological systems, and it is the third most transition metal element in the human body after iron and zinc. However, excessive intake of copper can lead to a series of lesions in organs, such as liver and kidney damage, neurodegenerative diseases, etc. In view of this, the U.S. Environmental Protection Agency stipulates that the maximum concentration of copper ions in drinking water should not exceed 20 μM. Therefore, it is very important to develop a suitable method to identify and detect the concentration of copper ions in water. At present, the common methods for detecting the concentration of copper ions in water include fluorescence method, electrochem...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/78G01N21/64
CPCG01N21/643G01N21/78G01N2021/6432
Inventor 陈杜刚余响林黎俊波刘佳俊王哲
Owner WUHAN INSTITUTE OF TECHNOLOGY
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