Analytical investigating method of perfluor n-pro-pyl vinyl ether

A technology of perfluoro-n-propyl vinyl ether and n-propyl vinyl ether, which is applied in the field of analysis and measurement of perfluoro-n-propyl vinyl ether, can solve the problems of being unsuitable for routine analysis of enterprises and expensive instruments, and achieves The effect of high practical value and simple method

Inactive Publication Date: 2007-07-18
SHANDONG HUAXIA SHENZHOU NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it is difficult to quantitatively analyze it with infrared analysis and nuclear magnetic resonance, an

Method used

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  • Analytical investigating method of perfluor n-pro-pyl vinyl ether
  • Analytical investigating method of perfluor n-pro-pyl vinyl ether
  • Analytical investigating method of perfluor n-pro-pyl vinyl ether

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0017] Example 1:

[0018] 1.1 Instrument

[0019] Agilent 6890 chromatograph

[0020] 1.2 Chromatographic conditions

[0021] Detector: FID (Flame Ionization Detector)

[0022] Column: DB-17

[0023] Column length: ￠0.25*30m

[0024] Column temperature: 40℃

[0025] Sampler: 120℃

[0026] Detector: 300°C

[0027] 1.3 Sample analysis

[0028] Since the sample is very volatile, be careful to move quickly when injecting the sample. Quickly sample 1uL for chromatographic analysis, and obtain the content of perfluoro-n-propyl vinyl ether by the following formula.

[0029]

[0030] In the formula: A is the peak area of ​​perfluoro n-propyl vinyl ether

[0031] ΣA is the total area of ​​each peak.

[0032] As shown in Figure 1, the peak area of ​​perfluoro-n-propyl vinyl ether is 658020 and the peak area of ​​hydride is 263. Then the content of perfluoro-n-propyl vinyl ether is:

[0033]

[0034] The following is a comparison of the results of nine consecutive determinations of two ...

Example Embodiment

[0043] Example 2: Selection of chromatographic conditions

[0044] Install the two groups of DB-1, DB-200, DB-17 with a liquid film of 0.32um and DB-1, DB-200, DB-17 with a liquid film of 1.0um and the aging capillary chromatographic columns respectively. On the Agilent 6890 chromatograph, the resolution test was carried out at different temperatures (column temperature). The results are shown in Table 2 and Table 3. The DB-1, DB-200, and DB-17 are chromatographic column types.

[0045] Table 2 Resolution of a chromatographic column with a liquid film thickness of 1.0um at different temperatures

[0046] Note: Resolution can indicate the separation of each component in the chromatographic column. When the resolution is greater than 1.5, the adjacent two chromatographic peaks can be completely separated. When the resolution is good, the measurement results can have sufficient parallelism and accuracy.

[0047] Table 3 Resolution of the chromatographic column with a liquid film thic...

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Abstract

The invention discloses hexafluoro-Propoxyethylene analyzing and measuring method. It includes the following steps: processing gas-chromatography analysis for the hexafluoro-Propoxyethylene; using area normalization to directly measure its content; chromatographic analysis temperature is 40 degree centigrade; chromatographic column type is DB-17; liquid membrane is 1.0um; detector is flame ionization. The invention has reliable result, simple operation, can be used to guide hexafluoro-Propoxyethylene study and production.

Description

technical field [0001] The invention relates to a method for analyzing and measuring perfluoro-n-propyl vinyl ether. Background technique [0002] Perfluoro-n-propyl vinyl ether is an important fluorine-containing synthetic intermediate, which is formed by addition, cracking and rectification of hexafluoropropylene oxide. raw material. In the production process, due to the existence of traces of water, hydrides and other impurities that are very close to the boiling point of perfluoro-n-propyl vinyl ether will be generated in the production. Due to the existence of these impurities, the quality of the produced PFA will be affected. . Therefore, high-purity perfluoro-n-propyl vinyl ether is required in production. However, it is difficult to quantitatively analyze it with infrared analysis and nuclear magnetic resonance, and the price of the instrument is relatively expensive, which is not suitable for routine analysis in enterprises. Contents of the invention [0003] ...

Claims

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Application Information

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IPC IPC(8): G01N30/02G01N30/68G01N30/60
Inventor 董光辉张永明高洪光王丽萍
Owner SHANDONG HUAXIA SHENZHOU NEW MATERIAL
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