A kind of copper ion detection test paper and the method for detecting copper ion in water

A copper ion detection and copper ion technology, applied in the field of ion detection, can solve problems such as unsuitable on-site detection or large-scale application, complex sample pretreatment process, difficult colorimetric detection, etc., to achieve fast detection speed and anti-interference High capacity and low cost effect

Active Publication Date: 2017-08-25
CHONGQING UNIV
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Problems solved by technology

However, the existing conventional detection methods require expensive large-scale instruments, complicated sample pretreatment processes, and professional operations by professional technicians.
Therefore, there is a slow sample detection, which is not suitable for on-site detection or large-scale promotion and application
In addition, in most cases, the concentration of metal ions in natural water is lower than the detection limit of colorimetry, so it is difficult to detect directly by colorimetry

Method used

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  • A kind of copper ion detection test paper and the method for detecting copper ion in water
  • A kind of copper ion detection test paper and the method for detecting copper ion in water
  • A kind of copper ion detection test paper and the method for detecting copper ion in water

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Embodiment Construction

[0029] The present invention will be described in further detail below in conjunction with the embodiments and accompanying drawings.

[0030] one. A test paper for detecting copper ions, using cellulose filter paper as the adsorption base layer, with nano-titanium dioxide and hydrazine functionally modified diamino groups on it, so as to realize the specific adsorption of copper ions and then achieve the purpose of pre-enrichment.

[0031] two. The preparation method of above-mentioned copper ion detection test paper, see figure 1 , including the following steps:

[0032] 1) Soaking modification: Soak the cellulose filter paper in absolute ethanol for 2 hours, and dry it at 60°C for 10 minutes.

[0033] 2) Titanium dioxide treatment: Soak the filter paper treated in step 1) in titanium solution, place it on a shaker and shake it for 30 minutes, wipe off the excess liquid on the surface of the filter paper, and dry it at 60°C for 15 minutes; repeat the above operation twice...

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Abstract

The invention relates to a copper ion detection test paper and a method for detecting copper ions in water. The detection test paper attaches nano-titanium dioxide and hydrazine functionally modified diamino groups to the adsorption base layer to achieve specific adsorption of copper ions and further achieve pre-treatment. purpose of enrichment. The present invention also provides a method for detecting copper ions in water by using the copper ion detection test paper. The detection method does not require the participation of pretreatment process and large-scale instruments, and has fast detection speed, low cost, strong anti-interference ability, and low detection limit. The lower detection limit of the invention for copper ions can reach 30nM, and its saturated adsorption capacity can reach 4.964μg / cm2.

Description

technical field [0001] The invention relates to a test paper for detecting copper ions and a method for detecting copper ions in water, belonging to the technical field of ion detection. Background technique [0002] Copper is one of the trace elements needed by animals and plants. It has an impact on human hematopoiesis, cell growth and endocrine gland function. Excessive intake of copper will stimulate the digestive system, causing abdominal pain, colic, nausea, diarrhea, and vomiting. Copper is highly toxic to lower organisms and crops, and its concentration greater than 0.1~0.2mg / L (about 2μM) can kill fish. Copper ions are required for signaling by oncogenic activated proteases and for tumor formation. The World Health Organization stipulates that, considering its toxicity, 1.5mg / L (about 25μM) is the maximum concentration allowed for copper ions in drinking water. [0003] In the prior art, instruments and methods for detecting copper ions in water include atomic abs...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/78G01N1/40
Inventor 侯长军季晨晖李俊杰霍丹群罗小刚
Owner CHONGQING UNIV
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