Trace copper ion visual rapid detection method

A detection method, copper ion technology, applied in the field of analytical chemistry, can solve the problems of difficult trace copper ion detection, low anti-matrix interference ability, poor stability, etc., and achieve good anti-matrix interference ability, stable properties, and good specificity Effect

Inactive Publication Date: 2014-03-26
FUZHOU UNIV
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Problems solved by technology

These click chemistry reactions are catalyzed by Cu(I) complexes, which require the removal of oxygen to avoid oxidation and failure, thus limiting the application of click chemistry in the on-site detection of copper ions
In short, all the above-mentioned rapid detection methods have disadvantages such as high cost, poor stability, low sensitivity and low ability to resist matrix interference, and are difficult to be used for the detection of trace copper ions in actual samples.

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Embodiment Construction

[0026] Rhodamine B spirolactam derivative modified Fe 3 o 4 The preparation method of the magnetic nanoparticle detection solution is as follows:

[0027] (1) Synthesis of Fe by thermal decomposition method 3 o 4 magnetic nanoparticles. Add iron(Ⅲ) acetylacetonate (0.706 g, 2 mmol) into the mixture of 10 mL of benyl ether and 10 mL of oleylamine to dissolve it. Next, the mixture was dehydrated at 110° C. for 1 hour under nitrogen flow. Then, the mixture was reacted at 300° C. for 2 hours in an atmosphere filled with nitrogen. After the reaction, the dark brown mixture was cooled to room temperature, added 40 mL of ethanol, collected by centrifugation (8000 rpm), and washed 3 times with ethanol. Finally, the product was dispersed in n-hexane (as shown in Figure 1-A).

[0028] (2) Preparation of rhodamine B spirolactam derivatives by reflux method.

[0029] (a) First, add 1.20 g (2.5 mmol) of rhodamine B and 30 mL of absolute ethanol to a 100 mL round-bottomed flask (1-2...

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Abstract

The invention discloses a trace copper ion visual rapid detection method. High sensitivity visual rapid detection of Cu<2+> is realized by using a rhodamine B spiro lactam derivative as a Cu<2+> identification probe and combining Fe3O4 magnetic nanoparticles. According to the invention, visual rapid detection of trace Cu<2+> is realized by utilizing the characteristics that the rhodamine B spiro lactam derivative modified on the magnetic nanoparticles can be specially combined with copper ions and changes color (from faint yellow to pink purple) and utilizing the enrichment of the magnetic nanoparticles. The trace copper ion visual rapid detection method has the characteristics of speediness, simplicity, high sensitivity, visualization, high specificity, low cost and the like, and can be used for visual rapid detection of trace copper ions in various water environment samples.

Description

technical field [0001] The invention belongs to the field of analytical chemistry, and in particular relates to a visual and rapid detection method for trace copper ions. Background technique [0002] Copper is the third most abundant transition metal element in the human body after iron and zinc. It is widely involved in a series of processes in the life system and is one of the essential elements for the human body. However, as a heavy metal element, copper is highly toxic, and excessive copper intake can cause harm to the human body. For example, copper (II) is a potential mutagen, and high doses of copper (II) ions may cause chromosome breakage and spindle interference in mammalian cells. Wilson's and Menkes' diseases are also two human genetic diseases closely related to copper metabolism disorders. Therefore, the Chinese government has strictly restricted the content of copper ions in the water environment. The national standard surface water environmental quality st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/78
Inventor 付凤富郭莹范英伟吴伟华
Owner FUZHOU UNIV
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