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Oxygen interference compensation method for flame ionization detector (FID)

An interference compensation and detector technology, applied in the field of oxygen interference compensation, can solve problems such as poor oxygen interference compensation effect

Active Publication Date: 2021-04-13
QINGDAO MINGHUA ELECTRONICS INSTR
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of this, the present invention provides an oxygen interference compensation method for FID detectors, which can effectively solve the problem that the oxygen interference compensation effect of the single-range point calibration method in the prior art is poor

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  • Oxygen interference compensation method for flame ionization detector (FID)
  • Oxygen interference compensation method for flame ionization detector (FID)
  • Oxygen interference compensation method for flame ionization detector (FID)

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Embodiment Construction

[0027] The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.

[0028] It should be noted that like numerals and letters denote similar items in the following figures, therefore, once an item is defined in one figure, it does not require further definition and explanation in subsequent figures. Meanwhile, in the description of the present application, relative terms such as "first", "second", etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that these entities or operations, any such actual relationship or order exists. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes elements...

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Abstract

The invention provides an oxygen interference compensation method for a flame ionization detector (FID). The oxygen interference compensation method comprises the following steps: carrying out single-range point calibration on an FID; introducing to-be-detected gas into the FID to obtain first concentration data of the to-be-detected gas; introducing the sample gas into the FID, and obtaining an oxygen interference compensation model based on the nominal value of the sample gas and the obtained concentration data of the sample gas; inputting the first concentration data of the to-be-detected gas into the oxygen interference compensation model to obtain second concentration data of the to-be-detected gas; judging whether the ratio of the second concentration data of the to-be-detected gas to the laboratory standard data is within a preset range, if the ratio exceeds the preset range, updating the oxygen interference compensation model, and if the ratio does not exceed the preset range, keeping the oxygen interference compensation model. Through the method provided by the invention, the problem of poor oxygen interference compensation effect of a single-range point calibration method in the prior art is effectively solved.

Description

technical field [0001] The invention relates to the technical field of gas measurement, in particular to an oxygen interference compensation method for an FID detector. Background technique [0002] At present, there are three main methods for measuring non-methane total hydrocarbons using FID detectors: gas chromatography, catalytic oxidation, and low-temperature freezing pre-concentration. The principle of the catalytic oxidation method is as follows: one channel of the gas to be tested is directly passed into the FID detector to obtain the content of total hydrocarbons, and the other channel of the same gas to be tested is passed through a heated catalyst to react the hydrocarbons in the gas to be tested except methane After generating carbon dioxide and water, pass the remaining methane in the gas to be tested into the FID detector to obtain the content of methane, and then subtract the content of methane from the content of total hydrocarbons to obtain the content of to...

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Application Information

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IPC IPC(8): G01N30/68G01N30/86
CPCG01N30/68G01N30/8665
Inventor 陶锡杨崇新赵飞虎姜顺欣吕磊
Owner QINGDAO MINGHUA ELECTRONICS INSTR