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Paper-based dual-mode detection method of lead ions

A dual-mode, lead ion technology, applied in material analysis by observing the effect on chemical indicators, analysis by chemical reaction of materials, material electrochemical variables, etc. It has the problems of economy and complex analysis process, and achieves the effects of abundant raw materials, reduced experimental costs, and simple post-processing.

Inactive Publication Date: 2018-01-16
UNIV OF JINAN
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  • Description
  • Claims
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Problems solved by technology

Although these methods have strong selectivity, high sensitivity, and wide analysis range, the above-mentioned methods require specific equipment for the detection of lead ion concentration, and the equipment itself is relatively expensive and uneconomical; , unable to achieve real-time determination of lead ions

Method used

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  • Paper-based dual-mode detection method of lead ions
  • Paper-based dual-mode detection method of lead ions
  • Paper-based dual-mode detection method of lead ions

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Embodiment 1

[0023] Embodiment 1 (lead ion in tap water)

[0024] A paper-based dual-mode detection method for lead ions with simple operation, fast detection speed and low cost, comprising the following steps:

[0025] 1. Use Adobe Illustrator CS4 software to design a cross-shaped hydrophobic wax printing pattern on the computer, and use a wax jet printer to print it in batches on cut A4 size filter paper, and then heat it on a heating plate until the wax melts and penetrates the entire thickness of the paper , forming a hydrophobic wall, the style is as attached figure 1 As shown, 1 is the channel plate, 2 is the detection plate, 3 is the reference plate, 4 and 5 are the light-shielding plates; the channel plate is used to assist the flow of liquid, so that the liquid in the working area of ​​the detection plate flows to the colorimetric strip to realize Visual prediction, the shading plate is used to prevent the interference of external light sources on the visual reaction, and the com...

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Abstract

The invention discloses a paper-based dual-mode detection method of lead ions. A hydrophobic area and a hydrophilic area are prepared on paper with wax printing and laser cutting technologies, and three electrodes are printed with a silk-screen printing technology. Different areas of a paper chip are functionalized with multiple methods, and visual judgement of the lead ions can be realized through the developing function of 3,3',5,5'-tetramethyl benzidine. Super-sensitive detection of to-be-detected articles can be realized by means of an electrochemical work station through the specific recognition function of the lead ions and DNA enzyme and specific catalysis of glucose oxidase for glucose.

Description

technical field [0001] The invention relates to a paper-based dual-mode detection method for lead ions, which belongs to the technical field of lead ion detection. Background technique [0002] Lead ion is an important toxic heavy metal ion pollutant in the environment, and its harm to human health, especially children's health, has aroused widespread concern in society. Excessive lead ions affect intellectual development and bone development, leading to indigestion, endocrine disorders, and decreased immune function. Therefore, the analysis and detection of lead ion concentration is of great significance to human health and environmental protection. [0003] At present, the methods for detecting lead ions mainly include ion imprinting method, electrochemical biosensor method, atomic absorption spectrometry, fluorescence spectrometry and so on. Although these methods have strong selectivity, high sensitivity, and wide analysis range, the above-mentioned methods require spe...

Claims

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Application Information

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IPC IPC(8): G01N21/78G01N27/27G01N27/30
Inventor 于京华徐金梦张彦孔庆坤葛慎光
Owner UNIV OF JINAN
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