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Gas chromatographic column separated through electric filed control and applications thereof

A gas chromatographic column and electric field control technology, applied in the field of chromatographic technology, can solve the problems of labor and time, high cost, limited separation capacity of the chromatographic column, etc., and achieve the effect of avoiding cost

Inactive Publication Date: 2012-09-19
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The separation ability of the chromatographic column is very limited, and it is often difficult to separate compounds with similar structures
The current method to change the chromatographic separation ability is mainly to replace different types of chromatographic columns or packing materials in chromatographic columns. These methods are costly, labor-intensive and time-consuming

Method used

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  • Gas chromatographic column separated through electric filed control and applications thereof
  • Gas chromatographic column separated through electric filed control and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A positive 500V voltage is applied to the inner electrode, and the outer electrode is grounded. At this time, a strong electric field will be formed in the chromatographic column.

[0022] The chromatographic column adopts a 10 m × 0.32 mm × 1.0 μm capillary column, and the column temperature is 50 o C (0.5 min) to 280 o C, with a heating rate of 15 o C / min, using He as the carrier gas, the flow rate is 40 ml / s, and the detector uses FID detector. 35% diphenyl 65% dimethylpolysiloxane stationary phase was used as stationary phase to separate and analyze p-benzene and monochlorobenzene.

[0023] Compared with when no voltage is applied, the polarity of monochlorobenzene increases, and the degree of distribution in the polar stationary phase changes, so the retention time of monochlorobenzene in the chromatographic column also increases. Molecules that are more polar have a greater change in retention time.

[0024] Compare the retention time of chromatographic peak...

Embodiment 2

[0026] A uniformly increasing positive voltage is applied to the inner electrode, and the voltage increase rate is 100V / s, and a polar stationary phase is used in the chromatographic column.

[0027] The chromatographic column adopts a capillary column of 10 m × 0.32 mm × 2.0 μm, and the column temperature is 50 o C (0.5 min) to 280 o C, with a heating rate of 15 o C / min, using He as the carrier gas, the flow rate is 20 ml / s, and the detector uses FID detector. 15% diphenyl 85% dimethyl polysiloxane stationary phase was used as stationary phase to separate and analyze p-benzene and monochlorobenzene.

[0028] Since the retention time of the polar molecule monochlorobenzene increases in a high electric field, while the non-polar molecule benzene changes little, weak polar molecules can be separated from non-polar molecules. The relationship between the change rate of electric field intensity and the retention time of polar molecules is obtained through experiments, and dra...

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Abstract

The invention relates to a gas chromatographic column, which is a chromatographic technology for controlling the retention time of compounds in a chromatograph by using an electric filed. Through enabling an internal electrode to pass through the gas chromatographic column, sleeving an external electrode on the gas chromatographic column, and exerting pressure on the electrodes, different electric field strengths can be obtained; and the electric field intensity affects the retention time of sample molecules in the chromatographic column, thereby realizing the separation of different samples.

Description

technical field [0001] The invention relates to a gas chromatographic column, which is a chromatographic technique using an electric field to control the retention time of compounds in the chromatogram. Background technique [0002] The separation ability of the chromatographic column is very limited, and it is often difficult to separate compounds with similar structures. The current method to change the chromatographic separation ability is mainly to replace different types of chromatographic columns or filling materials in the chromatographic columns. These methods are costly, labor-intensive and time-consuming. [0003] Polar molecules will increase their polarity due to the polarization of the electric field in the electric field, and non-polar molecules will also produce instantaneous polarity. Therefore, the molecular polarity can be changed by the magnitude of the electric field strength. In this patent, the polarity of the molecules in the chromatogram is changed ...

Claims

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Application Information

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IPC IPC(8): G01N30/06G01N30/64G01N30/26
Inventor 陈吉平赵晓峰倪余文
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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