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A test paper film based on nano gold and its method for detecting lead ions

A technology of nano-gold and lead ions, applied to the detection of lead ions, based on the field of nano-gold test paper film, can solve the problems of easy falling off of nano-gold, distortion of detection results, and influence of detection results, etc., achieve good anti-interference ability, simple production, and detection specific effect

Active Publication Date: 2017-06-27
CHONGQING UNIV
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  • Abstract
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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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  • A test paper film based on nano gold and its method for detecting lead ions
  • A test paper film based on nano gold and its method for detecting lead ions
  • A test paper film based on nano gold and its method for detecting lead ions

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Embodiment Construction

[0034] The present invention will be described in further detail below in conjunction with specific embodiments.

[0035] One, a kind of test paper film based on nano-gold, this test paper film is covered with nano-titanium dioxide coating on base film, is attached with nano-gold and thiosulfate root shell fixed by mercapto and amino on this coating.

[0036] Wherein, the basement membrane is one of ordinary filter paper, nitrocellulose membrane, cellulose acetate membrane and PVDF membrane.

[0037] Two, the preparation method of the above-mentioned test paper film based on nano-gold, may further comprise the steps:

[0038] 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;

[0039]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 the basement membrane surface, a...

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Abstract

The invention relates to a nano-gold test paper film and its method for detecting lead ions. The base film of the test paper film is covered with a nano-titanium dioxide coating, and the coating is attached with nano-gold and thioxo sulfate shell. The present invention also provides a method for detecting lead ions in water based on the nano-gold test paper film. The detection method of the present invention does not require a pre-treatment process for the sample to be tested, nor does it require the use of large instruments, and has fast detection speed and Low cost, strong anti-interference ability, low detection limit and other advantages. The detection lower limit of the present invention to 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 ex...

Claims

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Application Information

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Patent Type & Authority Patents(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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