Solid phase microextraction head for enriched perfluoro compound and preparation method thereof

A solid-phase microextraction head and perfluorinated compound technology, which is applied in the field of food analysis, can solve the problems of lack of special extraction heads for perfluorinated compounds, and achieve the effects of high mechanical strength, improved extraction efficiency, enhanced stability and firmness

Active Publication Date: 2018-09-07
GUANGZHOU QUALITY SUPERVISION & TESTING INST
View PDF5 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Based on this, it is necessary to address the problem that most of the solid-phase microextraction heads on the market are broad-spectrum and lack a special ext

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Solid phase microextraction head for enriched perfluoro compound and preparation method thereof
  • Solid phase microextraction head for enriched perfluoro compound and preparation method thereof
  • Solid phase microextraction head for enriched perfluoro compound and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A solid-phase microextraction head for enriching perfluorinated compounds, the preparation method of which is as follows:

[0032] 1) Take an iron wire with a diameter of 0.3mm, roughen its surface with fine sandpaper, and place it with a permanent magnet for several days until it becomes magnetic, then use 0.1M sodium hydroxide, 0.1M hydrochloric acid, methanol , acetone and ultrapure water for 10 minutes to remove surface oxides and impurities, and then dry in a vacuum oven.

[0033] 2) Preparation of fluorinated graphene (F-G):

[0034] Weigh 100 mg of graphene oxide into a 200 mL beaker, add 100 mL of ultrapure water, and sonicate for 30 minutes to obtain a uniform graphene oxide dispersion. Add the dispersion into a polytetrafluoroethylene-lined hydrothermal kettle, and add 60mL of hydrofluoric acid, tighten the hydrothermal kettle to make it airtight, then place it in an oven and keep it warm at 180°C 24h. After the reaction was completed, it was allowed to coo...

Embodiment 2

[0040] The metal carrier used in the experiment of this example is nickel wire, the diameter of which is 0.4 mm. The surface of the nickel wire is polished with fine sandpaper to roughen it, and then it is placed together with a permanent magnet for several days until it becomes magnetic. Wash with ultrapure water for 10 minutes to remove surface impurities. The cleaned magnetized nickel wire was vertically immersed in the dispersion for 5 minutes, then lifted vertically at a constant speed, and the pulling process was repeated until the coating thickness reached about 20 μm. The metal wire was subjected to aging treatment at 150°C for 1 h in a high-purity nitrogen atmosphere.

[0041] Other steps and preparation conditions are all identical with embodiment 1.

Embodiment 3

[0043]The iron wire of the metal carrier in the experiment of this embodiment, the diameter of the iron wire is 0.2mm, and its surface is roughened with fine sandpaper, and then placed together with a permanent magnet for several days until it is magnetic, and then washed with 0.1M sodium hydroxide , 0.1M hydrochloric acid, methanol, acetone and ultra-pure water for 10 minutes to remove surface oxides and impurities, immerse the cleaned magnetized iron wire vertically in the dispersion for 5 minutes, then lift it vertically at a constant speed, and repeat the pulling process until The coating thickness reaches about 100 μm. The metal wire was subjected to aging treatment at 200°C for 1.5h in a high-purity nitrogen atmosphere.

[0044] Other steps and preparation conditions are all identical with embodiment 1.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Thicknessaaaaaaaaaa
Thicknessaaaaaaaaaa
Diameteraaaaaaaaaa
Login to view more

Abstract

The invention relates to a solid phase microextraction head for an enriched perfluoro compound. The solid phase microextraction head consists of a metal carrier and a coating material coated and attached to the surface of the metal carrier; the coating material is ferromagnetic fluorinated graphene. The ferromagnetic fluorinated graphene is used as an adsorption coating; the perfluorinated compound can be effectively enriched; the heat stability is high; the stability is realized in an organic solvent; the problems that most solid phase microextraction heads in the market have broad spectrum performance, and specific extraction heads for efficiently enriching the perfluorinated compound in food are lacked. In addition, magnetized metal wires are used as metal carriers; the mechanical strength is high; the fracture cannot easily occur; the coating is fixed on the meal carrier through the magnetic force; the stability and the firmness of the extraction coating are greatly enhanced.

Description

technical field [0001] The invention relates to the technical field of food analysis, in particular to a solid-phase microextraction head for enriching perfluorinated compounds and a preparation method thereof. Background technique [0002] Solid phase microextraction (Solid Phase Microextraction, SPME) is a kind of sample pretreatment technology that integrates sampling, enrichment and sample injection, invented in the early 1990s. This technology uniformly coats a small amount of extraction phase on the On the surface of the fiber carrier, the analyte enriched on the coating is quickly desorbed to the analytical instrument (such as gas chromatography, liquid chromatography) through thermal desorption or solvent elution for analysis and determination, which greatly simplifies the conventional pretreatment The operation process is simple, easy to carry, and low in cost. It can be used in conjunction with gas chromatography, high performance liquid chromatography, electrophor...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): B01J20/286B01J20/32B01D15/20
CPCB01D15/20B01J20/286B01J20/324
Inventor 梁明陈立伟王莉王斌陈杰锋侯向昶吴玉銮郭新东冼燕萍
Owner GUANGZHOU QUALITY SUPERVISION & TESTING INST
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap