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FID ignition method and device for chromatographic analysis

An ignition device and chromatographic analysis technology, applied in the field of FID ignition method and device, can solve problems such as safety hazards, flameout, hydrogen leakage, etc., and achieve the effects of ensuring safety, small device size and high reliability

Inactive Publication Date: 2011-02-16
FOCUSED PHOTONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. Due to the complex use environment of the chromatographic analysis instrument, the flameout problem will inevitably occur during the long-term operation of the FID. Without human intervention, it cannot be automatically ignited successfully. It can only alarm and stop running, and cannot achieve long-term continuous monitoring.
[0005] 2. During the ignition process, it is impossible to directly judge whether it is ignited or not, but to judge whether it is ignited or not by the way of manual observation or verification by the experimenter
[0007] 4. There are potential safety hazards during the use of FID, such as the failure of FID to cause hydrogen leakage and other problems

Method used

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  • FID ignition method and device for chromatographic analysis
  • FID ignition method and device for chromatographic analysis
  • FID ignition method and device for chromatographic analysis

Examples

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Embodiment 1

[0041] see figure 2 , 3 , an FID ignition device used in online chromatographic analysis, said device includes a gas channel, an ignition device 15, a monitoring unit and a flow regulation module.

[0042] The gas channels include hydrogen channels, air channels and carrier gas channels.

[0043] The ignition device 15 is arranged in the mixing area of ​​hydrogen and air, and this embodiment adopts a heating wire.

[0044] The monitoring unit includes a monitoring module 16 and a judging module. The monitoring module 16 is set in the mixing area of ​​hydrogen and air for monitoring temperature or optical information. The judging module judges whether it is in an ignition state according to the monitoring information. In this embodiment, the monitoring module uses a temperature detector, such as a thermocouple.

[0045] The flow regulating module is arranged on the hydrogen channel or the air channel, and in this embodiment is arranged on the air channel. The flow regulati...

Embodiment 2

[0059] see Figure 4 , 5 , a kind of FID ignition device, is applied in the online chromatographic analysis, and embodiment 1 difference is:

[0060] 1. The ignition device adopts the discharge element 17 to ignite the hydrogen gas through discharge.

[0061] 2. The flow regulating module is set on the hydrogen channel.

[0062] 3. The monitoring module 18 adopts a light intensity detector.

[0063] This embodiment also discloses a FID ignition method, which is applied in online chromatographic analysis, and the method includes the following steps:

[0064] a. Ignition steps:

[0065] Such as Figure 4 As shown, at the time of ignition, by adjusting the control element 13, hydrogen passes through the first passage 11, which increases the flow ratio of hydrogen to air;

[0066] By controlling the discharge of the ignition device, the hydrogen gas is ignited;

[0067]b. Monitoring steps:

[0068] The light intensity detector monitors the light intensity information in th...

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Abstract

The invention relates to a flame ionization detector (FID) ignition method for chromatographic analysis. The method comprises the following steps of: a, ignition, namely regulating a flow ratio of hydrogen to air so as to make the ratio greater than a flow ratio during the normal analysis, and igniting the hydrogen by using an igniter; b, monitoring and judging, namely monitoring physical information generated by combustion, and judging whether the hydrogen is in a combustion state or not according to the information; if so, performing analysis operation; and otherwise returning to the step a, or entering a protection state, namely shutting the hydrogen off. The invention also provides an FID ignition device for the chromatographic analysis.

Description

technical field [0001] The invention relates to an automatic ignition method and device, in particular to an FID ignition method and device used in chromatographic analysis. Background technique [0002] In chromatographic analysis, a hydrogen flame ionization detector (Flame ionization detector, FID) is one of the most commonly used general-purpose chromatographic detectors. When using FID, it is necessary to use hydrogen and air combustion to ionize the sample before detection, and it is necessary to ensure that the hydrogen flame continues to burn during use. [0003] At present, the commonly used ignition methods are: figure 1 As shown, when igniting, increase the flow rate of hydrogen, and the staff will place the ignition gun in the mixing area of ​​hydrogen and air to ignite the hydrogen, and then withdraw the ignition gun. There are following deficiencies in this ignition mode: [0004] 1. Due to the complicated operating environment of the chromatographic analysi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/68
Inventor 李天麟朱文明刘伟宁肖旷刘立鹏郑毅
Owner FOCUSED PHOTONICS
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