Copper ion test paper and method for testing copper ions 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: 2015-11-18
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 no

Method used

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  • Copper ion test paper and method for testing copper ions in water
  • Copper ion test paper and method for testing copper ions in water
  • Copper ion test paper and method for testing copper ions 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 copper ion detection test paper, Cellulose filter paper is used as the adsorption base layer, and nano-titanium dioxide and hydrazine functionalized diamino groups are attached to it to achieve the specific adsorption of copper ions and 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; Th...

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Abstract

The invention relates to copper ion test paper and a method for testing copper ions in water. According to the test paper, nano titanium dioxide and hydrazine functionally-modified diamino groups are attached to an adsorption substrate, so that specific adsorption of the copper ions is realized, and preconcentration is realized. The invention further provides the method for testing the copper ions in the water by the aid of the copper ion test paper. With the adoption of the testing method, the pretreatment process and large instruments are not required, the testing speed is high, the cost is low, the anti-interference capability is high, and the testing limit is low; the lower testing limit value of the method for the copper ions can reach 30 nM, and the saturated adsorption amount can be up to 4.964 mu g/cm<2>.

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 a...

Claims

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Application Information

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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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