Determination and correction of frequency registration bias for quantitative spectra

A technology of registration deviation and frequency, which is applied in the field of spectral analysis, can solve the problems of less registration deviation in correcting nonlinear frequency, changes in background fluid composition, and the influence of temperature and pressure, etc.

Active Publication Date: 2021-04-06
ENDRESS + HAUSER OPTICAL ANALYSIS INC
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This approach also interrupts continuous process measurements, which can lead to severe measurement blind times when performing system validation
Peak tracking methods can be susceptible to changes in background fluid composition as well as temperature and pressure
Also, while peak tracking can often be used to correct for linear frequency registration biases, it often provides little benefit in correcting nonlinear frequency registration biases

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Determination and correction of frequency registration bias for quantitative spectra
  • Determination and correction of frequency registration bias for quantitative spectra
  • Determination and correction of frequency registration bias for quantitative spectra

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0029] Consistent with implementations of the present invention, multivariate analysis methods as described herein can be used to simulate and correct for frequency registration bias effects that may occur in spectroscopic analysis systems without requiring changes to the spectroscopic analysis system's existing hardware, using standard Periodic (or non-scheduled) instrument verification of gases, or dependence on peak tracking of compounds in fluid samples. In this way, stable, reliable and reproducible measurements can be achieved and maintained.

[0030] Although example implementations of the invention are described herein with respect to harmonic spectroscopy techniques using wavelength- or frequency-modulated tunable diode laser absorption spectrometers (TDLAS) or tunable semiconductor laser spectrometers, it should be understood that methods consistent with the invention can be used with Combination of analytical instruments or methods involving any quantitative spectro...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

When the spectroscopic analysis system of the sample fluid deviates from a standard calibration state, the frequency registration deviation is quantified in the field spectrum collected by the spectroscopic analysis system during analysis. The live spectrum is corrected based on the frequency registration bias using at least one spectral shifting technique, and at least one analyte concentration represented by the live spectrum is calculated using the corrected live spectrum. Related systems, methods and articles are described.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS [0002] This application is related to and claims priority to US Patent Application No. 14 / 817,119, filed August 3, 2015, the entire contents of which are hereby incorporated by reference. technical field [0003] The present disclosure relates generally to spectroscopic analysis, and more particularly to methods for achieving and maintaining accurate and reproducible frequency and / or wavelength registration of absorption spectral data from a spectroscopic analyzer. Background technique [0004] One or more of degradation, drift, or non-reproducibility of the hardware of a spectroscopic analysis system can affect frequency and wavelength registration, and thus the accuracy and reproducibility of measurements made using such a system. These effects are usually unavoidable in practical applications of spectroscopic analysis. The hardware of the spectroscopic analysis system may include light sources (eg, lamps, lasers, etc.), el...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & AuthorityPatents(China)
IPC IPC(8): G01J3/28G01N21/27
CPCG01N21/274G01N21/39G01J3/28G01J2003/283G01J2003/2866
Inventor刘翔加里·耶赫亚当·S·沙伊莫夫蒂斯威廉·延科阿尔弗雷德·菲提施
OwnerENDRESS + HAUSER OPTICAL ANALYSIS INC