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Method for detecting tetraethylene glycol dimethyl ether

A technology of tetraethylene glycol dimethyl ether and tetrahydrofuran, which is applied in the detection field, achieves the effects of simple operation, high selectivity and improved detection efficiency

Pending Publication Date: 2022-04-29
深圳天祥质量技术服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] There is no reliable analytical method for tetraethylene glycol dimethyl ether

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] In specific embodiment 1, the method for detecting tetraethylene glycol dimethyl ether includes:

[0078] Weigh 1.05g of the thermoplastic sample to be tested, cut the plastic sample to be tested into 5mm×5mm sample fragments, put them in a test tube, add 10mL tetrahydrofuran for mixing, and conduct ultrasonic extraction on the mixture at a temperature of 70°C 30min; then placed on a shaking table and shaken for 35min; then added 20mL of acetonitrile to the solution, and then carried out ultrasonic extraction treatment at a temperature of 70°C for 30min, and then filtered to obtain the solution to be tested on the machine, using gas chromatography-mass spectrometry The instrument was used for detection, and the chromatographic conditions used were: chromatographic column: DB-624, inlet temperature: 250°C; injection volume: 1μL; split mode: pulse without split; Raise the temperature to 80°C in min, then raise the temperature to 120°C at 10°C / min, then raise the temperatu...

Embodiment 2

[0080] In specific embodiment 2, the method for detecting tetraethylene glycol dimethyl ether includes:

[0081] Weigh 0.95g of the textile fabric sample to be tested, cut the textile fabric sample to be tested into 5mm×5mm sample fragments, put them in a test tube, add 10mL tetrahydrofuran to mix, and conduct ultrasonic waves on the mixture at a temperature of 70°C Extract for 30 minutes; then shake on a shaker for 30 minutes; then add 20 mL of acetonitrile to the solution, perform ultrasonic extraction at a temperature of 70 ° C for 30 minutes, and then filter to obtain the test solution to be tested on the machine, using gas chromatography mass spectrometry The chromatographic conditions used for detection are: chromatographic column: DB-624, inlet temperature: 250°C; sample volume: 1μL; split mode: pulse without split; heating curve: initial temperature 40°C, increasing to 5°C / min to 80°C, 10°C / min to 120°C, then 15°C / min to 250°C, and hold for 5 minutes; mass spectrometr...

Embodiment 3

[0083] In specific embodiment 3, the method for detecting tetraethylene glycol dimethyl ether includes:

[0084] Weigh 1.00g of the plastic sample to be tested, cut the plastic sample to be tested into 5mm×5mm sample fragments, put them in a test tube, add 10mL tetrahydrofuran to mix, and conduct ultrasonic extraction on the mixture at 70°C for 30min ; then placed on a shaker and shaken for 25 minutes; then added 20 mL of acetonitrile to the solution, and then carried out ultrasonic extraction at a temperature of 70 ° C for 30 minutes, and then filtered to obtain the solution to be tested and waited for detection on the machine, using gas chromatography-mass spectrometry The chromatographic conditions used are: chromatographic column: DB-624, inlet temperature: 250°C; injection volume: 1μL; split mode: pulse without split; heating curve: initial temperature 40°C, 5°C / min Raise the temperature to 80°C, raise the temperature to 120°C at 10°C / min, then raise the temperature to 25...

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Abstract

The invention provides a method for detecting tetraethylene glycol dimethyl ether, which is used for detecting tetraethylene glycol dimethyl ether in consumer goods, and comprises the following steps: sampling; pre-treating and detecting the content of tetraethylene glycol dimethyl ether in the pre-treated target object; wherein the pretreatment step comprises the following steps: mixing a sample with tetrahydrofuran, and carrying out ultrasonic extraction treatment at a first temperature for a first duration; adding acetonitrile, carrying out ultrasonic extraction treatment for a second duration at a second temperature, and filtering to obtain a solution to be detected. According to the method for detecting tetraethylene glycol dimethyl ether, the blank of national standard methods is filled, the requirements of customers with the detection requirements are met, the operation is simple, the recovery rate is high, the used equipment is easy to obtain, the method has high generalizability, and the detection lower limit can reach 50mg / kg.

Description

technical field [0001] The invention relates to the technical field of detection, in particular to a method for detecting tetraethylene glycol dimethyl ether. Background technique [0002] Glycol ethers are widely used organic solvents. These solvents are miscible with water and have a high boiling point, stability and polarity. In addition to being used in the synthesis of chemical substances, glycol ethers are also used in It is used in cosmetics, pharmaceuticals, ink coatings and other products. In recent years, with the in-depth research on glycol ethers, it has been found that such substances will be converted into methoxyacetic acid or other alkoxyacetic acids in the body. This kind of substance has strong mutagenicity and is harmful to Symptoms such as reproductive toxicity and impaired immunity may occur in humans. Therefore, various countries have imposed restrictions on the use of glycol ethers. For example, my country has listed seven glycol ethers as solvents t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/06G01N30/88
CPCG01N30/06G01N30/88
Inventor 沈丽虹张亦伦
Owner 深圳天祥质量技术服务有限公司
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