Modulation column for comprehensive two-dimensional gas chromatograph, modulator and comprehensive two-dimensional gas chromatograph

A two-dimensional gas chromatography and modulator technology, applied in instruments, scientific instruments, measuring devices, etc., can solve problems such as high cost

Inactive Publication Date: 2017-08-15
J&X ELECTRONICS TECH (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, traditional thermal modulation at the end of a one-dimensional chromatographic column or at the head of a two-dimensional chromatographic column often simply uses liquid nitrogen, liquid carbon dioxide, or a refrigerator to obtain extremely low temperatures to achieve rapid condensation of substances, which is expensive

Method used

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  • Modulation column for comprehensive two-dimensional gas chromatograph, modulator and comprehensive two-dimensional gas chromatograph
  • Modulation column for comprehensive two-dimensional gas chromatograph, modulator and comprehensive two-dimensional gas chromatograph
  • Modulation column for comprehensive two-dimensional gas chromatograph, modulator and comprehensive two-dimensional gas chromatograph

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Effect test

Embodiment 2

[0037] Embodiment 2 of the present invention: as Figure 5 As shown, the inner wall of the modulation column only covers the modulation phase at the first modulation position.

[0038] The comprehensive two-dimensional gas chromatograph adopts the effect of the modulated column of the above-mentioned embodiment 2: compared with adopting the modulated column without stationary phase, the analyte can still have sufficient separation with the stationary phase at a higher cooling temperature. The interaction improves the trapping capacity, and the adjustable boiling point range of the analyte increases significantly. Compared with the modulation column (such as Example 1) with stationary phases in modulation position 1 and modulation position 2, the trapping ability is relatively weak. Experiments show that under the same chromatographic conditions, the comprehensive two-dimensional gas chromatograph can capture the lowest n-decane, referred to as C10, with a boiling point of 174...

Embodiment 8

[0049] Embodiment 8 of the present invention: as Figure 11 As shown, the inner wall of the modulation column covers the stationary phase only at the second modulation position and a length extending from the second modulation position to the direction opposite to the first modulation position. Preferably, the extended length extends to one end of the modulation column until.

[0050] The effect of the comprehensive two-dimensional gas chromatograph using the modulated column of Example 8 is that the trapping capacity and heat release temperature are similar to those of Scheme 7, and the difference from the effect of Scheme 7 is that the coverage length of this stationary phase will make the two-dimensional The injection peak width increases, and for detectors with slower sampling rates, such as single quadrupole scanning mass spectrometers, it is beneficial to increase the sampling times of chromatographic peaks and obtain optimized signal-to-noise ratios and mass spectromete...

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Abstract

The invention discloses a comprehensive two-dimensional gas chromatograph, which comprises a sample inlet, a one-dimensional column, a two-dimensional column, a thermal modulator and a detector, wherein the thermal modulator comprises a first thermal modulation position and a second thermal modulation position; the sample inlet is connected with an inlet of the one-dimensional column; an outlet of the one-dimensional column is connected with the inlet of the first thermal modulation position through a pipe; the outlet of the first thermal modulation position is connected with the inlet of a second thermal modulation position through a pipe; the outlet of the second thermal modulation position is connected with the inlet of the two-dimensional column through a pipe; the outlet of the two-dimensional column is connected with the detector; a pipe between the outlet of the one-dimensional column and the inlet of the two-dimensional column is the modulation column; the modulation column can be replaced with a downstream segment of the one-dimensional column or an upstream segment of the two-dimensional column; and the inside of one part of the modulation column is coated with a fixed phase. Through the comprehensive two-dimensional gas chromatograph, the optimal modulation effect can be obtained for a comprehensive two-dimensional application.

Description

technical field [0001] The invention relates to the field of comprehensive two-dimensional gas chromatography modulation, in particular to a modulation column, a modulator and a comprehensive two-dimensional gas chromatograph for realizing thermal modulation of comprehensive two-dimensional gas chromatography by using a capillary column partially coated with a stationary phase. Background technique [0002] The thermal modulation of traditional comprehensive two-dimensional gas chromatography is realized at the end of the one-dimensional column or the head of the two-dimensional column. The so-called thermal modulation refers to switching between hot and cold temperatures at two specific positions of the column at a fixed frequency, so that the material flowing in the column with the carrier gas in one direction undergoes two or one condensation and heat release processes. In this way, all 1D effluents are sequentially stagnated to form segmented slices, which are then rapid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/46G01N30/56G01N30/54
CPCG01N30/46G01N30/54G01N30/56G01N2030/567G01N30/463G01N30/465G01N30/6069G01N2030/025
Inventor 官晓胜徐强
Owner J&X ELECTRONICS TECH (SHANGHAI) CO LTD
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