A method for detecting silver ions

A silver ion and suspension technology, applied in the field of silver ion detection, can solve the problems that restrict the development of PDA-based sensors, achieve the effect of dual detection and analysis of fluorescence, and low detection cost

Active Publication Date: 2022-04-15
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In conclusion, the complex organic synthesis restricts the development of PDA-based sensors to some extent.

Method used

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  • A method for detecting silver ions
  • A method for detecting silver ions
  • A method for detecting silver ions

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] (1) Preparation of PDA vesicle suspension:

[0045] Weigh 7.5mg of 10,12-pentacosadiynoic acid and dissolve it in 10ml of ethanol to prepare a 2mmol / L 10,12-pentacosadiynoic acid ethanol solution and store it for later use; weigh 50mg of ethylenediynoic acid Dissodium ethylenediaminetetraacetic acid powder was dissolved in 100mL HEPES (20mM, pH=7.4) buffer solution under heating and stirring conditions to prepare 1.5mmol / L disodium ethylenediaminetetraacetic acid aqueous solution, which was stored for later use; at room temperature at 1000rpm Take 0.5mL of 10,12-pentacosadiynoic acid ethanol solution slowly dropwise into 10mL of disodium edetate aqueous solution, and then place the obtained colorless suspension in a 4°C refrigerator Store in the dark for 8 hours, take it out and irradiate it with 254nm ultraviolet light (6W, 10cm away from the sample) for 5 minutes to obtain a blue PDA vesicle suspension; figure 1 According to scanning electron microscope and transmiss...

Embodiment 2

[0052] (1) Preparation of PDA vesicle suspension:

[0053] Weigh 7.5mg of 10,12-pentacosadiynoic acid and dissolve it in 10ml of ethanol to prepare a 2mmol / L 10,12-pentacosadiynoic acid ethanol solution and store it for later use; weigh 33.6mg of acetylene Dissolve disodium diamine tetraacetate powder in 100mL HEPES (20mM, pH=7.4) buffer solution under heating and stirring conditions, and prepare 1mmol / L disodium ethylenediamine tetraacetate aqueous solution, and store it for later use; at room temperature and 1000rpm 1.0 mL of 10,12-pentacosadiynoic acid ethanol solution was slowly dropped into 10 mL of disodium edetate aqueous solution drop by drop, and then the resulting colorless suspension was placed in a 4°C refrigerator Store in the dark for 8 hours, take it out and irradiate it with 254nm ultraviolet light (6W, 10cm away from the sample) for 10min to obtain a blue PDA vesicle suspension.

[0054] (2) Blue PDA vesicles are used for Ag + Qualitative and quantitative an...

Embodiment 3

[0057] (1) Preparation of PDA vesicle suspension:

[0058] Weigh 7.5mg of 10,12-pentacosadiynoic acid and dissolve it in 10ml of ethanol to prepare a 2mmol / L 10,12-pentacosadiynoic acid ethanol solution and store it for later use; weigh 67.2mg of acetylene Dissolve disodium diamine tetraacetate powder in 100mL HEPES (20mM, pH=7.4) buffer solution under the condition of heating and stirring, and prepare 2mmol / L disodium ethylenediamine tetraacetate aqueous solution, and store it for later use; Take 1.5mL of 10,12-pentacosadiynoic acid ethanol solution slowly dropwise into 10mL of disodium edetate aqueous solution, then place the resulting colorless suspension in a 4°C refrigerator Store in the dark for 12 hours, take it out and irradiate it with 254nm ultraviolet light (6W, 10cm away from the sample) for 5min to obtain a blue PDA vesicle suspension.

[0059] (2) Blue PDA vesicles are used for Ag + Qualitative and quantitative analysis of:

[0060] Analysis method is with emb...

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Abstract

The invention provides a method for detecting silver ions. Specifically, the ethanol solution of 10,12-pentacosadiynoic acid is dripped into ethylenediamine by using vesicle suspension under the condition of avoiding light and stirring at room temperature. In the aqueous solution of disodium tetraacetate, the suspension was placed overnight at low temperature to make it self-assemble to obtain a colorless supramolecular suspension; then the colorless supramolecular suspension was polymerized under ultraviolet irradiation to obtain a blue polymer Diacetylene vesicle suspension. Compared with other detection methods, the polydiacetylene vesicle suspension designed in the present invention can be used for Ag detection in water environment. + The visual detection does not require complex biochemical modifications, large-scale equipment and tedious sample pretreatment process, the detection cost is low, and fast real-time analysis can be realized.

Description

technical field [0001] The invention belongs to the field of chemical detection, in particular to a method for detecting silver ions. Background technique [0002] Silver and its compounds are widely used in production and life. Excessive silver will seriously endanger the ecological environment and human health. Therefore, Ag in the environment + Rapid and accurate detection is of great significance. Existing Ag + Detection methods such as spectroscopy, fluorescent probe methods, and electrochemical sensors usually require expensive instruments, dedicated operations, time-consuming sample pretreatment processes or complex design and synthesis processes, and it is difficult to achieve on-site detection. [0003] Polydiacetylene (PDA) is a kind of conjugated polymer with special optical properties. Under external stimuli, it will undergo color transition from blue to red and non-fluorescent to fluorescent. Therefore, the blue state of PDA is considered to be An ideal metal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F138/00C08F2/48G01N21/31G01N21/33G01N21/64G01N21/75
CPCC08F138/00C08F2/48G01N21/31G01N21/33G01N21/643G01N21/75G01N2021/755
Inventor 朱光明郝瑜佳
Owner NORTHWESTERN POLYTECHNICAL UNIV
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