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A detection method for pentachlorophenol content in paper packaging materials

A paper packaging material, pentachlorophenol technology, applied in electrochemical variables of materials, analytical materials, material analysis by electromagnetic means, etc., can solve the problems of poor anti-interference, expensive instruments, long response time, etc.

Active Publication Date: 2021-03-12
SHANGHAI TOBACCO GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above-mentioned shortcoming of the prior art, the object of the present invention is to provide a kind of detection method that is used for pentachlorophenol content in the paper packaging material, by adopting the electrochemical method based on the sensor of nano-carbon material to paper packaging material Rapid determination of pentachlorophenol substances in the medium is used to solve the problems of expensive instruments, long response time, low sensitivity and poor anti-interference in the prior art

Method used

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  • A detection method for pentachlorophenol content in paper packaging materials
  • A detection method for pentachlorophenol content in paper packaging materials

Examples

Experimental program
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Effect test

Embodiment 1

[0066] 1. Preparation of screen-printed carbon (SPCE) electrodes

[0067] The conductive silver paste was printed on the PET substrate to form electrode strips, and cured in an oven at 120° C. for 40 minutes to form a conductive silver layer. The conductive carbon paste was printed on the conductive silver layer, and cured at 71° C. for 30 minutes to form a carbon working layer. Covering insulating ink was printed on the conductive part in the conductive silver layer, and cured at 80° C. for 10 minutes to form an insulating layer. Finally, screen-printed carbon (SPCE) electrodes were prepared.

[0068] 2. Preparation of functionalized MWCNTs

[0069] Weigh 1 g of multi-walled carbon nanotubes (MWCNTs) and add it to 50 mL of 30% H 2 o 2 In the solution, ultrasound was applied for 4h to disperse the MWCNTs uniformly in the solution. Then, it was filtered with a 0.45 μm filter membrane, washed three times with ultrapure water, and dried in vacuum at 45° C. for 12 hours. Add...

Embodiment 2

[0073] 1. Preparation of functionalized monolayer graphene

[0074] Weigh 1 g of single-layer graphene and add to 50 mL of 30% H 2 o 2 In the solution, ultrasound was applied for 3 hours to uniformly disperse the single-layer graphene in the solution. Then, it was filtered with a 0.45 μm filter membrane, washed three times with ultrapure water, and dried in vacuum at 45° C. for 12 hours. Add the intermediate product of the above treatment to the mixed acid of nitric acid and sulfuric acid (HNO 3 :H 2 SO 4 =1:3), after 30 minutes of ultrasonication, reflux at 70°C for acidification reaction for 7 hours, to introduce oxygen-containing groups such as carboxyl and hydroxyl groups on the surface of single-layer graphene, to increase the water solubility of the material, and wash the product with ultrapure water until neutral , after drying in a vacuum oven at 45°C, the functionalized single-layer graphene material is obtained.

[0075] 2. Preparation of graphite electrodes ba...

Embodiment 3

[0078] 1. Preparation of functionalized nano-activated carbon

[0079] Weigh 1g of nano activated carbon and add to 50mL30%H 2 o 2 In the solution, sonicate for 5 hours, so that the nano activated carbon is evenly dispersed in the solution. Then, it was filtered with a 0.45 μm filter membrane, washed three times with ultrapure water, and dried in vacuum at 45° C. for 12 hours. Add the intermediate product of the above treatment to the mixed acid of nitric acid and sulfuric acid (HNO 3 :H 2 SO 4 =1:3), ultrasonication for 30min and then reflux at 90°C for acidification for 9h, to introduce oxygen-containing groups such as carboxyl and hydroxyl groups on the surface of nano-activated carbon to increase the water solubility of the material, and the product was washed with ultrapure water until neutral, and then After drying in a vacuum oven at 45°C, the functionalized nano-activated carbon material is obtained.

[0080] 2. Preparation of glassy carbon electrodes based on na...

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Abstract

The invention provides a method for detecting pentachlorophenol content in paper packaging materials, comprising the following steps: 1) preparing a sample solution; 2) preparing a standard solution mother liquor; 3) taking different volumes of the standard solution mother liquor and adding them to In the phosphate buffer solution, standard solutions of different concentrations are prepared, and the standard curve is established after qualitative and quantitative detection using sensors based on functionalized nano-carbon materials, and then the sample solution is added to the phosphate buffer solution. After being detected by the sensor of the nanometer carbon material, the content of pentachlorophenol in the sample solution is obtained by the standard curve. The present invention further provides a sensor based on functionalized nano-carbon material and a preparation method thereof. The method for detecting the content of pentachlorophenol in paper packaging materials provided by the invention has fast response, high sensitivity, good accuracy and strong anti-interference ability, and is suitable for rapid detection of actual samples.

Description

technical field [0001] The invention belongs to the technical field of detection of chemical components of paper packaging materials, and relates to a detection method for pentachlorophenol content in paper packaging materials, in particular to a sensor based on nano-carbon materials for rapid detection of paper packaging materials Method for the content of pentachlorophenol in the Background technique [0002] Pentachlorophenol (PCP) is widely used as a preservative in wood, textiles, paper, etc. Its physical and chemical properties are very stable, and it is not easy to be oxidized or hydrolyzed under normal conditions. It can be enriched in animals and even humans through the food chain, causing lung cancer. , liver, kidney and nervous system damage. At present, paper packaging materials have been widely used in the field of food packaging, and the residue of pentachlorophenol in packaging paper increases the risk of food safety problems. Therefore, it is very important ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/30G01N27/48
CPCG01N27/307G01N27/308G01N27/48
Inventor 朱翔徐莹陈栎娜
Owner SHANGHAI TOBACCO GRP CO LTD
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