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Method for detecting iodine in sample by utilizing polypyrrole nano fiber membrane

A polypyrrole nanometer and detection method technology, which is applied in the field of iodine separation technology and detection, can solve the problems of insufficient detection sensitivity, lack of specificity, and difficulty in iodine detection, and achieve rapid separation and enrichment, convenient operation, and removal of interference effect of things

Active Publication Date: 2014-09-03
TIANJIN MEDICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The direct detection of some biological samples cannot achieve the ideal detection sensitivity and lack of specificity, which cannot meet the needs of accurate analysis
Therefore, due to the complex pretreatment of human biological samples and dietary samples and the limitation of detection method sensitivity, the detection of iodine in human biological samples and dietary samples is often difficult to meet the needs of basic research

Method used

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  • Method for detecting iodine in sample by utilizing polypyrrole nano fiber membrane
  • Method for detecting iodine in sample by utilizing polypyrrole nano fiber membrane

Examples

Experimental program
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Effect test

Embodiment 1

[0040] Take 1g of polyamide, place it in a 50mL volumetric flask, add 10mL of formic acid, and stir until dissolved. The above solution was prepared into a polyamide nanofiber membrane template by electrospinning (see Qian Xu, et al. Microchim Acta (2010) 168:267–275 for detailed electrospinning method).

[0041] Cut the template polyamide nanofiber membrane into a moderate size and place it in a vessel, add 50% ethanol to soak it, and rinse it clean. Then add appropriate amount of pyrrole monomer solution and oxidant FeCl 3 Solution (molar mass ratio is 1:2), polypyrrole (PPy) is formed by chemical polymerization at room temperature and deposited on the template nanofiber membrane to form a polypyrrole nanofiber membrane. Scanning electron microscopy was used to observe the morphology, such as figure 1 and 2 As shown, the diameter of the template fiber is about 300nm, and pyrrole mainly undergoes in-situ polymerization on the surface of the template fiber to form polypyrro...

Embodiment 2

[0043] A method for the efficient separation and enrichment of polypyrrole nanofiber membranes and the detection of iodine in samples:

[0044] (1) Preparation of polypyrrole nanofiber membrane: the template material (polystyrene) was dissolved in a solvent (tetrahydrofuran) to form an electrospinning solution, and the solution was spun into a template nanofiber membrane by electrospinning technology, Cut the template nanofiber membrane into a moderate size and place it in a vessel, add cleaning solution to soak, and rinse. Then add appropriate amount of pyrrole monomer solution and oxidant FeCl 3 Solution, polypyrrole (PPy) is formed by chemical polymerization at room temperature and deposited on the template nanofiber membrane to form a polypyrrole nanofiber membrane. After rinsing, put it into a dry box for drying; the pyrrole monomer and the oxidizing agent FeCl 3 The molar mass ratio of the solution is 1:2.

[0045] (2) Activation of the polypyrrole nanofiber membrane:...

Embodiment 3

[0050] The method for detecting iodine in samples using polypyrrole nanofiber membranes:

[0051] (1) Activation of the polypyrrole nanofiber membrane: the polypyrrole nanofiber membrane is soaked in the solution and rinsed to activate it;

[0052] (2) Adsorption of polypyrrole nanofiber membrane: soak the activated polypyrrole nanofiber membrane in a mixed solution for adsorption, and the adsorption time is 30 minutes; the mixed solution refers to: dietary sample digestion solution (rice); The weight ratio of the mixed solution: the polypyrrole nanofiber membrane is 50:1; the adsorption of the polypyrrole nanofiber membrane includes: active adsorption or passive adsorption.

[0053] (3) Cleaning of the polypyrrole nanofiber membrane: use the solution (50% ethanol) described in step (1). Treating the polypyrrole nanofiber membrane that has adsorbed iodine; the cleaning of the polypyrrole nanofiber membrane refers to; solution soaking, rinsing or flowing through the polypyrrol...

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Abstract

The invention discloses a method for efficiently separating, enriching and detecting iodine in a sample based on a polypyrrole nano fiber membrane. The method comprises the steps of (1) preparing the polypyrrole nano fiber membrane; (2) activating the polypyrrole nano fiber membrane; (3) performing active or passive adsorption of the polypyrrole nano fiber membrane; (4) cleaning the polypyrrole nano fiber membrane; (5) directly carrying out detection on the content of iodine by utilizing the polypyrrole nano fiber membrane. According to the method disclosed by the invention, the polypyrrole nano fiber membrane is taken as an adsorbent, and the iodine in a biological sample can be efficiently and quickly separated and enriched, so that the purposes of removing interferent, concentrating the iodine and directly carrying out determination of the iodine can be realized; the method has the advantages that the operation is convenient, and separation, enrichment and detection are integrated into a whole body.

Description

technical field [0001] The invention relates to the field of iodine separation technology and detection, in particular to a method for high-efficiency separation, enrichment and detection of iodine in samples based on polypyrrole nanofiber membranes. Background technique [0002] Iodine is an essential trace element for the human body, and its deficiency can lead to various damages to the body. Thyroid damage has gradually attracted people's attention. Iodine is an essential trace element for the human body. Once the human body is deficient in iodine, it will lead to brain damage, irreversible mental retardation, goiter, and cretinism in severe cases. On the other hand, excessive intake of iodine can also lead to disease. Therefore, it is of practical significance to detect the iodine content in human biological samples and dietary samples. Due to the low content of trace iodine in biological detection samples and complex basic components, the technical requirements for ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/78G01N1/34G01N1/40
Inventor 陈利琴沈钧张万起
Owner TIANJIN MEDICAL UNIV