Trace detection based on chemical amplification of the optoacoustic effect

Journal Article · Sun Dec 01 04:00:00 EST 1985 · Anal. Chem.; (United States)

DOI:https://doi.org/10.1021/ac00291a052· OSTI ID:6177884

Choi, J G; Diebold, G J

In contrast to excitation in the infrared, generation of the optoacoustic effect in the visible or ultraviolet region of the spectrum opens up the possibility of initiation of chemical reactions such that the energy released by the reactions far exceeds the amount of energy absorbed from the light beam. Since the magnitude of the optoacoustic effect is proportional to the amount of heat liberated by the chain reaction, the effect of the addition of a radical scavenger is to quench the chemical liberation of heat in the spectrophone and hence to decrease the acoustic signal amplitude. A new highly sensitive method of trace detection using both chemical amplification and quenching of the optoacoustic effect is reported. 22 references, 3 figures, 1 table.

• Research Organization: Brown Univ., Providence, RI
• OSTI ID: 6177884
• Journal Information: Anal. Chem.; (United States), Journal Name: Anal. Chem.; (United States) Vol. 57:14; ISSN ANCHA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400104* -- Spectral Procedures-- (-1987)
ACETYLENE
ALKANES
ALKENES
ALKYNES
AMPLIFICATION
CHALCOGENIDES
CHEMICAL ANALYSIS
CHEMICAL REACTIONS
DATA
ELEMENTS
ENTHALPY
EPOXIDES
ETHANE
ETHYLENE
EXPERIMENTAL DATA
HYDROCARBONS
HYDROGEN
INFORMATION
METHANE
NITRIC OXIDE
NITROGEN COMPOUNDS
NITROGEN OXIDES
NONMETALS
NUMERICAL DATA
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PHOTOACOUSTIC EFFECT
PHOTOACOUSTIC SPECTROSCOPY
PHYSICAL PROPERTIES
PROPANE
PROPYLENE
QUANTITATIVE CHEMICAL ANALYSIS
REACTION HEAT
SIGNAL-TO-NOISE RATIO
SPECTROSCOPY
THERMODYNAMIC PROPERTIES