A simple approach to derivative spectroscopy

Craven, Peter G.; Fairhurst, S.A.; Sutcliffe, L.H.

doi:10.1016/0584-8539(88)80043-6

Cited by 8 publications

(4 citation statements)

References 3 publications

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“…2. Wavelength modulation spectroscopy, also known as derivative spectroscopy, 28 utilizes modulation frequencies ω much smaller than the frequency of the absorption line of interest. Wavelength modulation spectroscopy has been used with tunable diode laser sources since the early 1970s.…”

Section: Modern Laser Spectroscopy Techniquesmentioning

confidence: 99%

Applications of Absorption Spectroscopy Using Quantum Cascade Lasers

Zhang

Тиан

et al. 2014

Appl Spectrosc

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Infrared laser absorption spectroscopy (LAS) is a promising modern technique for sensing trace gases with high sensitivity, selectivity, and high time resolution. Mid-infrared quantum cascade lasers, operating in a pulsed or continuous wave mode, have potential as spectroscopic sources because of their narrow linewidths, single mode operation, tunability, high output power, reliability, low power consumption, and compactness. This paper reviews some important developments in modern laser absorption spectroscopy based on the use of quantum cascade laser (QCL) sources. Among the various laser spectroscopic methods, this review is focused on selected absorption spectroscopy applications of QCLs, with particular emphasis on molecular spectroscopy, industrial process control, combustion diagnostics, and medical breath analysis.

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Section: Modern Laser Spectroscopy Techniquesmentioning

confidence: 99%

Applications of Absorption Spectroscopy Using Quantum Cascade Lasers

Zhang

Тиан

et al. 2014

Appl Spectrosc

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“…To date, more than a thousand papers have been published in which the term "derivative spectroscopy" is mentioned in the title. The theory and practice of derivative spectroscopy are covered in detail in many books [2][3][4], reviews [5][6][7][8][9][10][11], and studies [7,[12][13][14][15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Gaussian Decomposition vs. Semiclassical Quantum Simulation: Obtaining the High-Order Derivatives of a Spectrum in the Case of Photosynthetic Pigment Optical Properties Studying

Razjivin,

Kozlovsky,

Ashikhmin

et al. 2023

Sensors

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In this paper, a procedure for obtaining undistorted high derivatives (up to the eighth order) of the optical absorption spectra of biomolecule pigments has been developed. To assess the effectiveness of the procedure, the theoretical spectra of bacteriochlorophyll a, chlorophyll a, spheroidene, and spheroidenone were simulated by fitting the experimental spectra using the differential evolution algorithm. The experimental spectra were also approximated using sets of Gaussians to calculate the model absorption spectra. Theoretical and model spectra can be differentiated without smoothing (high-frequency noise filtering) to obtain high derivatives. Superimposition of the noise track on the model spectra allows us to obtain test spectra similar to the experimental ones. Comparison of the high derivatives of the model spectra with those of the test spectra allows us to find the optimal parameters of the filter, the application of which leads to minimal differences between the high derivatives of the model and test spectra. For all four studied pigments, it was shown that smoothing the experimental spectra with optimal filters makes it possible to obtain the eighth derivatives of the experimental spectra, which were close to the eighth derivatives of their theoretical spectra.

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“…In molecular spectroscopy, where, as a rule, broad heavily-overlapping bands are examined, derivative spectroscopy makes it possible to separate these bands and identify the spectrum with reasonable accuracy [9][10][11][12]. However, analysis of the derivative spectra is often difficult due to the line shape asymmetry.…”

Section: Introductionmentioning

confidence: 99%

Separation of the overlapping spectral lines using derivative spectra

Koryukina

Rēvalde

2006

Russ Phys J

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A code package is written to determine the maximum positions and half-widths of overlapping spectral lines forming the total profile. This package allows us to reconstruct spectral line profiles forming the total shape based on the experimental spectrum. An analysis is carried out based on the n-th derivatives of the line shape under study. The package calculates the Doppler, Lorentz and Voigt profiles and their n-th order derivatives and constructs spectral line profiles forming the spectral line under consideration and the corresponding total profile. These codes can be used both in molecular and in atomic spectroscopy, if need be.

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A simple approach to derivative spectroscopy

Cited by 8 publications

References 3 publications

Applications of Absorption Spectroscopy Using Quantum Cascade Lasers

Applications of Absorption Spectroscopy Using Quantum Cascade Lasers

Gaussian Decomposition vs. Semiclassical Quantum Simulation: Obtaining the High-Order Derivatives of a Spectrum in the Case of Photosynthetic Pigment Optical Properties Studying

Separation of the overlapping spectral lines using derivative spectra

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