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Test paper film based on nanogold and method for detecting lead ion by test paper film

A technology of nano-gold and lead ions, which is used in material analysis by observing the influence of chemical indicators, and analysis by chemical reaction of materials, etc., can solve the problem of affecting test results, distortion of test results, and easy falling off of nano-gold. problem, to achieve the effect of strong detection specificity, simple production and good anti-interference ability

Active Publication Date: 2015-10-21
CHONGQING UNIV
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Problems solved by technology

However, detection in the liquid phase by this method is also susceptible to aggregation reactions due to external interference factors, affecting the detection results
Adsorbing gold nanoparticles to a solid-phase environment can solve this problem well, but gold nanoparticles are easy to fall off in a solid-phase environment, causing false positives and distorting test results

Method used

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  • Test paper film based on nanogold and method for detecting lead ion by test paper film
  • Test paper film based on nanogold and method for detecting lead ion by test paper film
  • Test paper film based on nanogold and method for detecting lead ion by test paper film

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Embodiment Construction

[0035] The present invention will be described in further detail below in conjunction with specific embodiments.

[0036] One, a kind of test paper film based on nano gold, In the test paper film, the base film is covered with a nano-titanium dioxide coating, and the coating is attached with a nano-gold and a thiosulfate root shell fixed by a mercapto group and an amino group.

[0037] Wherein, the basement membrane is one of ordinary filter paper, nitrocellulose membrane, cellulose acetate membrane and PVDF membrane.

[0038] Two, the preparation method of the above-mentioned test paper film based on nano gold , including the following steps:

[0039] 1) Soaking modification: soak the basement membrane in absolute ethanol for 2 hours at 50-70°C, and then dry at 40°C for 10 minutes;

[0040]2) Titanium dioxide treatment: Soak the basement membrane treated in step 1) in the titanium solution, place it on a shaker and shake it for 30 minutes, wipe off the excess liquid on t...

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Abstract

The invention relates a test paper film based on nanogold and a method for detecting lead ion by the test paper film; a nano-titanium dioxide coating is coated on a basement membrane of the test paper film, and the nano-titanium dioxide coating is adhered with the nanogold and thiosulfuric acid root shell which are fixed by sulfydryl and amidogen. The invention also provides a method for detecting the lead ion in water by the test paper film based on the nanogold, the pre-treatment process for a sample to be detected is not needed, and large-scale equipment is not needed either; the method provided by the invention has the advantages of fast detection speed, low cost, strong anti-interference and low limit of detection; the detection lower limiting value of the lead ion can reach 5nM.

Description

technical field [0001] The invention belongs to the technical field of ion detection, and in particular relates to a nano-gold-based test paper film and a method for detecting lead ions. Background technique [0002] Lead is a toxic heavy metal. The pollution of lead to the environment is caused by the industrial and mining enterprises that smelt, manufacture and use lead products, especially the lead-containing waste water, waste gas and waste residue discharged from the non-ferrous metal smelting process. The second is caused by the leaded exhaust gas discharged from automobiles. In gasoline, tetraethyl lead is used as an antiknock agent. During gasoline combustion, lead enters the atmosphere with the exhaust gas discharged from automobiles. In addition, some lead-containing batteries are discarded at random, making the distribution of lead pollution particularly widespread. Lead ions can have a serious impact on the environment and human health. Even a small amount of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/78
Inventor 侯长军郭建峰汪显峰李俊杰霍丹群法焕宝杨眉
Owner CHONGQING UNIV
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