scholarly journals CO2 Laser Photoacoustic Spectroscopy: I. Principles

10.5772/37734 ◽  
2012 ◽  
Author(s):  
Dan C. ◽  
Ana Maria ◽  
Cristina Pop
Keyword(s):  
Co2 Laser ◽  
Photoacoustic Spectroscopy ◽  
Laser Photoacoustic Spectroscopy

CO2-laser photoacoustic spectroscopy of deuterated ammonia

1997 ◽  
Vol 38 (6) ◽  
pp. 331-336 ◽  
Author(s):  
Ljubica T. Petkovska ◽  
Šćepan S. Miljanić
Keyword(s):  
Co2 Laser ◽  
Photoacoustic Spectroscopy ◽  
Laser Photoacoustic Spectroscopy

CO2-laser photoacoustic spectroscopy applied to low-level toxic-vapor monitoring

1986 ◽  
Vol 64 (9) ◽  
pp. 1124-1131 ◽  
Author(s):  
G. L. Loper ◽  
J. A. Gelbwachs ◽  
S. M. Beck
Keyword(s):  
Co2 Laser ◽  
Photoacoustic Spectroscopy ◽  
Ambient Air ◽  
Detection Capability ◽  
Photoacoustic Cell ◽  
Low Concentration ◽  
Low Level ◽  
Laser Photoacoustic Spectroscopy ◽  
Industrial Compounds

A CO2-laser photoacoustic detector is being developed that can detect the hazardous hydrazine-based rocket fuels and selected toxic industrial compounds at concentrations below 100 ppb in the ambient air. This paper reviews our work to develop this detector based on the principles of photoacoustic spectroscopy and classical acoustics. The low parts-per-billion level detection capability of the method to the hydrazines is demonstrated with both acoustically nonresonant and resonant photoacoustic cell designs. A flowing, resonant photoacoustic cell whose interior is coated with tetrafluoroethylene Teflon has been shown to be preferred for detecting highly adsorptive or reactive compounds. Photoacoustic spectroscopy has been demonstrated to be useful in measuring adsorption or reaction losses of low-concentration gases on surfaces.

scholarly journals The Analysis of Lead Phytotoxicity in Seeds Using CO2 Laser Photoacoustic Spectroscopy

Molecules ◽  
2020 ◽  
Vol 25 (7) ◽  
pp. 1637 ◽  
Author(s):  
Cristina Popa ◽  
Ana Maria Bratu ◽  
Mioara Petrus ◽  
Mihaela Bacalum
Keyword(s):  
Heavy Metal ◽  
Molecular Markers ◽  
Fluorescence Microscopy ◽  
Co2 Laser ◽  
Natural Environment ◽  
Photoacoustic Spectroscopy ◽  
Physiological Activity ◽  
Root Cells ◽  
Laser Photoacoustic Spectroscopy ◽  
Plant Respiration

Lead (Pb) is the most prevalent heavy metal pollutant in the natural environment. Pb is not a fundamental element for plants, but they absorb it when it is present in their environment, having no known physiological activity. The aim of our research was to evaluate the efficacy of laser photoacoustic spectroscopy as a tool to monitor changes induced by Pb in plant respiration by highlighting two molecular markers (C2H4 and CO2). To better understand Pb phytotoxicity, we monitored the plantlets evolution as well as the morphology of the root cells. Firstly, we showed that the treatment hinders the plantlet’s development. Furthermore, using laser photoacoustic spectroscopy, we found a decrease in the concentration of C2H4 and CO2 vapors measured in the respiration of treated plants. Finally, fluorescence microscopy results showed that in Pb treated plantlets, the cell roots morphology is clearly altered as compared with the untreated ones. All the results are well correlated and can help further in understanding Pb phytotoxicity.

CO2-laser photoacoustic spectroscopy of deuterated and tritiated forms of hydrogen sulphide

1991 ◽  
Vol 31 (3) ◽  
pp. 303-309 ◽  
Author(s):  
Ljubica T. Petkovska ◽  
Bojan B. Radak ◽  
Šćepan S. Miljanić ◽  
Slobodan V. Ribnikar
Keyword(s):  
Co2 Laser ◽  
Hydrogen Sulphide ◽  
Photoacoustic Spectroscopy ◽  
Laser Photoacoustic Spectroscopy

Simultaneous detection of ammonia, methane and ethylene at 1.63 μm with diode laser photoacoustic spectroscopy

2005 ◽  
Vol 82 (3) ◽  
pp. 495-500 ◽  
Author(s):  
M. Scotoni ◽  
A. Rossi ◽  
D. Bassi ◽  
R. Buffa ◽  
S. Iannotta ◽  
...  
Keyword(s):  
Diode Laser ◽  
Photoacoustic Spectroscopy ◽  
Simultaneous Detection ◽  
Laser Photoacoustic Spectroscopy
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