Target analyte detection and quantification in sample gases with complex background compositions

A target analyte, gas technology, applied in the field of target analyte detection and quantification in the sample gas with complex background components, to achieve the effect of accurate compensation

Active Publication Date: 2017-08-29
ENDRESS + HAUSER OPTICAL ANALYSIS INC
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

These errors have been found to be a significant challenge to the optical measurement of trace level impurities (e.g., less than about 10,000 ppm) in

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  • Target analyte detection and quantification in sample gases with complex background compositions
  • Target analyte detection and quantification in sample gases with complex background compositions
  • Target analyte detection and quantification in sample gases with complex background compositions

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Embodiment Construction

[0022]Various methods can be applied to compensate for collisional broadening caused by pressure and temperature differences during quantitative analysis of target analyte concentrations from one sample gas to another. For example, through proper sample conditioning, including pressure regulation and temperature stabilization of the sample gas, the pressure and / or temperature of the sample gas can be maintained sufficiently close to the calibration gas pressure and / or temperature. In another example, real-time measured pressure and temperature can be used to compensate for collisional broadening variations by applying theoretical and / or empirical models, including but not limited to polynomial corrections, pressure-temperature matrices, stoichiometry, empirical calibration, and the like. In another example, spectroscopically measured parameters (eg, harmonic modulation parameters) can also be adjusted in real time to compensate for line shape broadening due to sample gas pressu...

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Abstract

Background composition concentration data representative of an actual background composition of a sample gas can be used to model absorption spectroscopy measurement data obtained for a gas sample and to correct an analysis of the absorption spectroscopy data (e.g. for structural interference and collisional broadening) based on the modeling.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to U.S. Patent Application Serial No. 14 / 538,699, filed November 11, 2014, entitled "Target Analyte Detection AndQuantification In Sample Gases With Complex Background Compositions," the entire contents of which are incorporated herein by reference . technical field [0003] The subject matter described herein relates to compensation by spectroscopic analyzers for the effects of collision broadening and spectral interference from background flow gases on measurements, eg detection and / or quantification of trace gases. Background technique [0004] Spectroscopic analysis generally relies on the detection and quantification of the emission or absorption of radiation by matter. Radiation is absorbed or emitted by specific energies determined by transitions induced by the molecules of the analyte. For example, in infrared spectroscopy, discrete energy quanta are absorbed by molecules due ...

Claims

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Application Information

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IPC IPC(8): G01N21/3504G01N21/39G01N21/65
CPCG01N21/3504G01N21/39G01N21/65G01N2021/399G01N2021/3545G01N2201/129G01J3/42G01J3/44G01J1/0433G01J3/0294G01J3/28G06F17/10G01N2201/0612G06F30/20
Inventor 刘翔阿尔弗雷德·菲提施基斯·本杰明·赫尔布莱詹姆斯·特德斯柯
Owner ENDRESS + HAUSER OPTICAL ANALYSIS INC
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