Detection method for 2-methoxyethanol, 2-ethoxyethanol, 2-methoxyethanol acetate and 2-ethoxyethanol acetate

A technology of ethylene glycol ether acetate and ethylene glycol monoethyl ether, which is applied in the detection field of ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol methyl ether acetate and ethylene glycol ether acetate, Achieve the effect of accurate analysis method, accurate quantitative result and high recovery rate

Inactive Publication Date: 2011-10-26
GUANGZHOU PONY TESTING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the situation that there is no relevant detection standard at present, propose a kind of ethylene glycol monomethyl ether, ethylene glycol monoethyl ether in the detection product with conventional gas chromatography technology that is equipped with hydrogen flame ionization detector , ethylene glycol methyl ether acetate and ethylene glycol ether acetate content method

Method used

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  • Detection method for 2-methoxyethanol, 2-ethoxyethanol, 2-methoxyethanol acetate and 2-ethoxyethanol acetate
  • Detection method for 2-methoxyethanol, 2-ethoxyethanol, 2-methoxyethanol acetate and 2-ethoxyethanol acetate
  • Detection method for 2-methoxyethanol, 2-ethoxyethanol, 2-methoxyethanol acetate and 2-ethoxyethanol acetate

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Using methanol as a solvent, prepare a series of standard solutions of ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol methyl ether acetate and ethylene glycol ether acetate, and perform gas chromatography and hydrogen flame ionization according to the experimental conditions Detector GC-FID analysis and detection, in which the inlet temperature was set at 250°C, nitrogen was used as the carrier gas, and the flow rate was 1ml / min; the temperature control of the chromatographic column was controlled by a temperature program, starting at 40°C, maintaining it for 3 minutes, and increasing at 5°C / The temperature was raised to 100°C for 1 min, then raised to 230°C at 30°C / min, and kept for 5 min; the temperature of the hydrogen flame ionization detector was set at 260°C, the injection volume was 1 μL, and the split ratio was set at 5:1. figure 1 Be the chromatogram of the detected ethylene glycol monomethyl ether, ethylene glycol monoethyl ...

Embodiment 2

[0032] Accurately weigh 1g (accurate to 0.01g) of the pulverized plastic sample, place it in a filter paper bag, wrap it well, place it in a Soxhlet extractor, add an appropriate amount of methanol, install the Soxhlet extractor and condensing device, turn on the heat source, Heat to reflux and extract for 4 hours. After the extraction is completed, turn off the heat source, wait for the system to cool down to room temperature, remove the Soxhlet extractor and condensing device, concentrate the extraction solution, and dilute it to a 25ml volumetric flask with methanol, take an appropriate amount of the solution, filter it, and inject it into a gas chromatograph for determination . Three parallel samples were made to the electronic sample, and the experiment numbers were A-1, A-2, and A-3 respectively. The analysis results are shown in Table 1. The first parallel sample (experiment number A-1) was measured 6 times in parallel. The analysis results are shown in Table 2. It ca...

Embodiment 3

[0039] The standard solution in Example 1 was added to the plastic sample in Example 2, and the experiment was carried out according to the above-mentioned sample pretreatment method and instrumental analysis and detection method. Two spiked levels were made to the sample, and three parallel measurements were taken for each sample with the spiked amount to get the average value, and the spiked recovery rate of the sample was calculated according to the actual amount added and the measured results. The results are shown in Table 3. It can be seen from Table 3 that the recovery rate of the samples is in the range of 91.0-95.0%.

[0040] Table 3 The recovery rate of standard addition of plastic samples

[0041]

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Abstract

The invention relates to a detection method for 2-methoxyethanol, 2-ethoxyethanol, 2-methoxyethanol acetate and 2-ethoxyethanol acetate, comprising the following steps: pretreating a sample with Soxhlet<,>s extraction method or ultrasound extraction method; detecting 2-methoxyethanol, 2-ethoxyethanol, 2-methoxyethanol acetate and 2-ethoxyethanol acetate with a gas chromatograph providing with a hydrogen flame ionization detector, with the injector temperature of 180-250 DEG C, high purity nitrogen as carrier gas, the carrier gas flow rate of 0.8-1.5ml / min, and polar column as chromatographic column; bringing the pretreated sample in the chromatographic column through the gas chromatograph for programming temperature from 40-80 DEG C to 220-240 DEG C; and separating the four objects from the chromatographic column. The method has the advantages of cheap detector, simple and safe operation, accurate and rapid analytical method.

Description

【Technical field】 [0001] The present invention relates to a detection method of ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol methyl ether acetate and ethylene glycol ether acetate, in particular to a method equipped with a hydrogen flame ionization detector Method for detection of ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol methyl ether acetate and ethylene glycol ether acetate by gas chromatography. 【Background technique】 [0002] Ethylene glycol monomethyl ether (2-methoxyethanol), ethylene glycol monoethyl ether (2-ethoxyethanol), ethylene glycol methyl ether acetate (2-methoxyethanol acetate) and ethylene glycol ethyl ether acetate (2-ethoxyethanol acetate) are all It is a common chemical reagent, mainly used as solvent, chemical intermediate, diluent and fuel additive, and has a wide range of applications in modern industry. [0003] Studies have found that these four substances have certain e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/68
Inventor 宋薇
Owner GUANGZHOU PONY TESTING TECH
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