Preparation method of solid phase microextraction coating

An extraction and coating technology, applied in the field of solid-phase micro-extraction coating preparation, can solve the problems of large environmental pollution, short service life, poor thermal stability and other problems in the preparation process, and achieves reduced environmental pollution, long service life, and extraction coating. stable effect

Active Publication Date: 2019-04-09
JIANGSU UNIV OF SCI & TECH
View PDF7 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The coatings in the prior art, such as polydimethylsiloxane, divinylbenzene, methylvinylsiloxane, etc., and their composite coatings, have weak enrichment ability and large environmental pollution in the preparation process. Low mechanical strength, poor thermal stability, high cost, short service life and other disadvantages

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
  • Preparation method of solid phase microextraction coating
  • Preparation method of solid phase microextraction coating
  • Preparation method of solid phase microextraction coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The solid-phase microextraction coating preparation method of the present embodiment comprises the steps:

[0024] (1) Preparation of straw powder: cut corn straw into small pieces of about 0.5 cm, dry, crush, and pass through a 100-mesh sieve;

[0025] (2) Preparation of ionic liquid aqueous solution: 30% (W / V%) ionic liquid aqueous solution: take 30g ionic liquid 1-ethyl-3-methylimidazole diethyl phosphate salt, add 100ml deionized water;

[0026] (3) Preparation of straw solution: take 100g of 30% ionic liquid aqueous solution, add 1g of straw, add 0.01g of cellulase and pectinase, stir at 50°C for 30min, filter to obtain straw, dry, add 80% 1-ethyl- 100 g of a mixed solution of 3-methylimidazolium phosphate diethyl ester salt and 20% DMSO was heated at 150° C. for 1 hour, and cooled for later use to obtain a straw solution;

[0027] (4) Preparation of graphene oxide derivatives: Add 1g of graphite powder to 100g of acidic ionic liquid 1-ethyl-3-methylimidazole diet...

Embodiment 2

[0032] The solid-phase microextraction coating preparation method of the present embodiment comprises the steps:

[0033] (1) Preparation of straw powder: cut mulberry straw into small pieces of about 0.5 cm, dry, crush, and pass through a 100-mesh sieve;

[0034] (2) Preparation of ionic liquid aqueous solution: 30% (W / V%) ionic liquid aqueous solution: take 30g ionic liquid 1-butyl-3-methylimidazolium chloride salt, add 100ml deionized water;

[0035] (3) Preparation of straw solution: Take 100g of 30% ionic liquid aqueous solution, add 1g of straw, add 0.01g of cellulase, stir at 50°C for 30min, filter to obtain straw, dry, add 90% 1-ethyl-3-methylimidazole 100 g of a mixed solution of diethyl phosphate salt and 10% DMSO was heated at 160° C. for 30 min, and cooled for later use to obtain a straw solution;

[0036] (4) Preparation of graphene oxide derivatives: Add 1g of graphite powder to 100g of acidic ionic liquid 1-ethyl-3-methylimidazole diethyl phosphate salt, add it t...

Embodiment 3

[0041] The solid-phase microextraction coating preparation method of the present embodiment comprises the steps:

[0042] (1) Preparation of straw powder: cut wheat straw into small pieces of about 0.5 cm, dry, crush, and pass through a 100-mesh sieve;

[0043] (2) Preparation of ionic liquid aqueous solution: 30% (W / V%) ionic liquid aqueous solution: get 30g 1-ethyl-3-methylimidazole phosphate dimethyl salt and 1-butyl-3-methylimidazole acetic acid Add 100ml of deionized water to the ionic liquid in which the salt is mixed according to 1:1 (W / W);

[0044] (3) Preparation of straw solution: Take 100g of 30% ionic liquid aqueous solution, add 1g of straw, add 0.01g of pectinase, stir at 50°C for 30min, filter to obtain straw, dry, add 85% 1-ethyl-3-methylimidazole 100 g of a mixed solution of dimethyl phosphate salt and 15% DMSO was heated at 160° C. for 30 min, and cooled for later use to obtain a straw solution;

[0045] (4) Preparation of graphene oxide derivatives: Add 1g...

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
Login to view more

Abstract

The invention discloses a preparation method of a solid phase microextraction coating. The method comprises the following steps: adding straws and biological enzymes into an ionic liquid water solution; adding a mixed solution of an acidic ionic liquid and DMSO (dimethyl sulfoxide) after completing the reaction; performing heating to obtain a straw solution; adding graphite powders into the ionicliquid; performing ultrasonic preprocessing; adding sulfuric acid and potassium permanganate; performing ultrasonic preprocessing once again; imforming oxygen; performing centrifuging, washing, precipitating and drying to obtain graphene oxide; adding the graphene oxide into the acidic ionic liquid; adding 1-methylimidazole, n-methylpyridine or pyrrolidone; performing heating to obtain a grapheneoxide derivative; mixing the straw solution and the graphene oxide derivative; performing heating to obtain a sol solution; taking extraction fibers to form a rough surface; washing with an organic solvent; performing ultrasonic and drying; immersing in the sol solution; immersing in a polar solvent; and performing drying. The method has the advantages of being good in biocompatibility, high in enrichment capacity, stable in extraction coating, long in service life and the like.

Description

technical field [0001] The invention relates to a preparation method of a solid phase microextraction coating, in particular to a preparation method of a solid phase microextraction coating. Background technique [0002] Solid Phase Microextraction (Solid Phase Microextraction, SPME) was first developed in 1990 by the research team of Professor Pawliszyn of the University of Waterloo, Canada, and is a non-solvent selective extraction method. The technology has the advantages of simple operation, no solvent, fast extraction speed, easy automation, easy to combine with high-efficiency separation and detection methods such as chromatography and electrophoresis, and is suitable for gas, liquid and solid sample analysis. The novel sample pretreatment technology is outstanding. The advantages. Compared with solid phase extraction (SPE), SPME method has the characteristics of less extraction phase, higher selectivity of analytes, and easier eluting of solutes. Or in practice have...

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
Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28
CPCG01N1/28
Inventor 李强季更生胡学健黄帆曹喜涛范史寅马静
Owner JIANGSU UNIV OF SCI & TECH
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