Phase optimization for quantitative analysis using phase Fourier transform photoacoustic spectroscopy

1997 ◽  
Vol 36 (2) ◽  
pp. 312 ◽  
Author(s):  
Hughes Marchand
Keyword(s):  
Fourier Transform ◽  
Quantitative Analysis ◽  
Photoacoustic Spectroscopy ◽  
Phase Optimization

Fourier-transform photoacoustic spectroscopy: a more complete method for quantitative analysis

1986 ◽  
Vol 64 (9) ◽  
pp. 1081-1085 ◽  
Author(s):  
M. Choquet ◽  
G. Rousset ◽  
L. Bertrand
Keyword(s):  
Absorption Spectrum ◽  
Fourier Transform ◽  
Quantitative Analysis ◽  
Photoacoustic Spectroscopy ◽  
Photoacoustic Signal ◽  
Strong Absorption ◽  
Absorption Bands ◽  
Asbestos Fibers ◽  
Fourier Transform Spectra ◽  
Signal Saturation

Strong absorption bands of photoacoustic Fourier-transform spectra are often truncated relative to weaker bands owing to signal saturation. To correct this problem, we propose processing both the phase and the amplitude information in the photoacoustic signal. Under certain conditions, easily fulfilled in typical experiments, we are able to calculate the absolute absorption spectrum from the photoacoustic data. Experimental results are given for asbestos fibers (chrysotile).

Quantitative Analysis of a Binary Mixture by Fourier Transform Infrared Photoacoustic Spectroscopy

1981 ◽  
Vol 35 (2) ◽  
pp. 185-186 ◽  
Author(s):  
Mark G. Rockley ◽  
Dennis M. Davis ◽  
Hugh H. Richardson
Keyword(s):  
Fourier Transform ◽  
Quantitative Analysis ◽  
Binary Mixture ◽  
Photoacoustic Spectroscopy ◽  
Fourier Transform Infrared ◽  
Isotopic Shift ◽  
Infrared Photoacoustic Spectroscopy

The isotopic shift of the v2 NO3−1 absorption of mixtures of K15NO3 and K14NO3 at 800 and 825 cm−1 has been used to demonstrate that Fourier transform infrared photoacoustic spectroscopy is a technique which is useful for quantitative analysis of solid mixtures.

Quantitative Determination of Catalytic Surface Adsorption Sites by Fourier Transform Infrared Photoacoustic Spectroscopy

1983 ◽  
Vol 37 (2) ◽  
pp. 131-133 ◽  
Author(s):  
Joseph A. Gardella ◽  
Da-Zhen Jiang ◽  
Edward M. Eyring
Keyword(s):  
Fourier Transform ◽  
Quantitative Analysis ◽  
Calibration Curve ◽  
Photoacoustic Spectroscopy ◽  
Surface Adsorption ◽  
Fourier Transform Infrared ◽  
Catalytic Surface ◽  
Adsorption Sites ◽  
Ft Ir ◽  
Infrared Photoacoustic Spectroscopy

The use of Fourier transform infrared photoacoustic spectroscopy (FT-IR/PAS) as a method for quantitative analysis of surface adsorption sites is demonstrated. Mid-IR information about the amount of adsorption is available with the sampling advantages of PAS: ability to analyze opaque materials with minimal sample preparation, qualitative information about both gas [CO(g)] phase and adsorbed [CO(ads)] species, a sealed sample environment for control of the gas phase in contact with the sample, and the ability to monitor in situ reaction kinetics. In this study a calibration curve is constructed for the amount of CO(g) in the sample cell with a silica internal reference. This calibration curve is utilized to calculate the amount of CO(ads) by subtraction on a catalytic surface where both CO(g) and CO(ads) exist at equilibrium. Using standard parameters from gas titration/volume uptake studies, the surface covered and the percentage of active sites on the surface are determined. This analysis combines the qualitative analytical capabilities of PAS with quantitative analysis, thus demonstrating another facet of the usefulness of FT-IR/PAS in addressing unusual problems.

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