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 chromatograph

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

Example Embodiment

[0020] Example 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 is formed in the chromatographic column.

[0022] The chromatographic column adopts a capillary column of 10 m × 0.32 mm × 1.0 μm, and the column temperature is 50 o C (0.5 min) to 280 o C, the heating rate is 15 o C / min, use He as carrier gas, flow rate of 40 ml / s, and use FID detector as detector. The stationary phase adopts 35% diphenyl 65% dimethyl polysiloxane stationary liquid to separate and analyze 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. The more polar molecules change the retention time.

[0024] Compare the retention time of the chromatographic peaks under multiple voltages, ...

Example Embodiment

[0025] Example 2

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

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

[0028] Since the retention time of the polar molecule monochlorobenzene in a high electric field increases, and the non-polar molecule benzene changes little, it is possible to separate weakly polar molecules from non-polar molecules. The relationship between the rate of change of the electric field intensity and the retention time of polar molecules is obtained through experiments, and...

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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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