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Method for detecting tetraethylene glycol dimethyl ether in leather

A tetraethylene glycol dimethyl ether and detection method technology, which is applied in the field of chemical detection, can solve the problems of unreported tetraethylene glycol dimethyl ether detection methods and related standards, and achieve anti-sample impurity interference and strong selectivity , good reproducibility

Pending Publication Date: 2022-03-18
福建省纤维检验中心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, domestic and foreign literature has not reported the research on the detection method and related standards of tetraethylene glycol dimethyl ether in leather.

Method used

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  • Method for detecting tetraethylene glycol dimethyl ether in leather
  • Method for detecting tetraethylene glycol dimethyl ether in leather
  • Method for detecting tetraethylene glycol dimethyl ether in leather

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0082] The mensuration of tetraethylene glycol dimethyl ether in the bovine leather sample of embodiment 1

[0083] (1) Preparation of standard solution: pipette 0.01013g of tetraethylene glycol dimethyl ether standard substance with a pipette gun, use methanol as solvent, set the volume to 100mL, and obtain 101.3mg / L tetraethylene glycol dimethyl ether standard stock solution, dilute the tetraethylene glycol dimethyl ether standard stock solution into various concentrations of tetraethylene glycol dimethyl ether standard solutions, the concentrations are 0.5, 1.0, 2.5, 5.0, 7.5, 10.0 mg / L respectively.

[0084] (2) Sampling and ultrasonic extraction: Use scissors or a rag to cut the bovine leather sample without tetraethylene glycol dimethyl ether into small pieces of 2mm × 2mm, and accurately weigh 1.00g (+0.01g) Put the sample in a glass bottle with a screw cap (volume 40mL), add 10mL extraction solvent acetone and 0.2mL 1.0mg / L tetraethylene glycol dimethyl ether standard ...

Embodiment 2

[0109] The mensuration of tetraethylene glycol dimethyl ether in embodiment 2 pig leather

[0110] (1) Sampling and ultrasonic extraction: Cut the pig leather sample into small pieces of 2mm×2mm or less with scissors or a rag machine, accurately weigh 1.00g of the sample and place it in a glass bottle with a screw cap (volume 40mL), Add 10 mL of extraction solvent acetone, cover and screw tightly, vortex and mix well, and put it into an ultrasonic water bath at 30°C for ultrasonic treatment for 30 min. Collect the supernatant, rinse the residue with 10 mL of acetone and extract again for 5 min, and combine the sample extracts into a concentration bottle for subsequent concentration operations.

[0111] (3) Concentration: Place the concentrating bottle on a rotary evaporator, under the conditions of vacuum degree of 550mbar, water bath temperature of 40°C, and rotation speed of 20rpm, evaporate and concentrate to near dryness, blow dry with nitrogen, add 3.0mL of n-hexane to di...

Embodiment 3

[0134] The mensuration of tetraethylene glycol dimethyl ether in the bovine leather sample of embodiment 3

[0135] (1) Sampling and ultrasonic extraction: Use scissors or a rag to cut the cow leather sample into small pieces of 2mm×2mm or less, and accurately weigh 18 samples of 1.00g and place them in glass bottles with screw caps (volume 40mL). ), add 10mL extraction solvent acetone respectively, add 0.1mL 10mg / L tetraethylene glycol dimethyl ether standard solution into 6 of them and cover and tighten tightly, add 0.2mL Add 10mg / L tetraethylene glycol dimethyl ether standard solution and cap it tightly, add 0.1mL 100mg / L tetraethylene glycol dimethyl ether standard solution to the remaining 6 glass bottles and cap it tightly. After vortex mixing, ultrasonic treatment was performed for 30 min in an ultrasonic water bath at 30°C. The supernatants were collected and the residue was rinsed with 10 mL of acetone to extract again for 5 min, and the sample extracts were combined...

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Abstract

The invention relates to the technical field of chemical detection, in particular to a method for detecting tetraethylene glycol dimethyl ether in leather, which comprises the following steps: (1) preparing a standard solution; (2) sampling and ultrasonic extraction; (3) concentrating; (4) solid-phase extraction column purification; (5) concentration and enrichment; and (6) carrying out gas chromatography-mass spectrometry detection. The method can simply, accurately and highly sensitively detect tetraethylene glycol dimethyl ether in leather, has the advantages of simplicity, convenience, sample impurity interference resistance, strong selectivity, high accuracy, strong sensitivity, good reproducibility, low detection limit and the like, and has good recovery rate and precision; the method can be widely used for detecting the content of tetraethylene glycol dimethyl ether in leather.

Description

technical field [0001] The invention relates to the technical field of chemical detection, in particular to a method for detecting tetraethylene glycol dimethyl ether in leather. Background technique [0002] Tetraethylene glycol dimethyl ether is an organic aprotic colorless solvent, which can be used as an excellent solvent for alkali gold hydrides, and can also be used in various chemical reaction processes such as alkylation condensation and reduction. Due to the Lewis basicity of this compound, it can selectively absorb acid gases and be used for the purification of synthesis gas, natural gas, acetylene and other gases. Tetraethylene glycol dimethyl ether coating can be used in glucose sensors, which makes the sensor have "anti-adhesive" properties and enhances the connection between biomimetic molecules and surfaces; in terms of promoting cell adhesion, tetraethylene glycol dimethyl ether helps proteins selective adsorption. In addition, tetraethylene glycol dimethyl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02G01N30/06G01N30/72
CPCG01N30/02G01N30/06G01N30/72G01N2030/025
Inventor 潘行星黄宗雄连秋燕刘贵林宁婷
Owner 福建省纤维检验中心
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