Photoacoustic method for measuring concentration of chemical species

Autrey, S Thomas; Posakony, Gerald J; Amonette, James E; Foster-Mills, Nancy S

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Title: Photoacoustic method for measuring concentration of chemical species

Abstract

The present invention is a transducer for photoacoustic detection having at least two piezoelectric elements wherein at least a first piezoelectric element has a first frequency and at least a second piezoelectric element has a second frequency. The improvement according to the present invention is that at least two piezoelectric elements are longitudinal elements for longitudinal waves; and the first frequency is different from said second frequency. In other words, the invention is a multi-frequency longitudinal transducer for photoacoustic detection.

Inventors:

Autrey, S Thomas ^[1]; Posakony, Gerald J ^[2]; Amonette, James E ^[2]; Foster-Mills, Nancy S ^[2]

West Richland, WA
Richland, WA

Issue Date:: 2001-01-01

Research Org.:: Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 873774

Patent Number(s):: 6244101

Application Number:: 09/322,910

Assignee:: Battelle Memorial Institute (Richland, WA)

Patent Classifications (CPCs):: G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES

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G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
G01N21/1702 - {with opto-acoustic detection, e.g. for gases or analysing solids}

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DOE Contract Number:: AC06-76RL01830

Resource Type:: Patent

Country of Publication:: United States

Language:: English

Subject:: photoacoustic; method; measuring; concentration; chemical; species; transducer; detection; piezoelectric; elements; element; frequency; improvement; according; longitudinal; waves; words; multi-frequency; piezoelectric element; longitudinal waves; chemical species; chemical specie; electric element; piezoelectric elements; longitudinal wave; measuring concentration; electric elements; /73/356/

Citation Formats


                    Autrey, S Thomas, Posakony, Gerald J, Amonette, James E, and Foster-Mills, Nancy S. Photoacoustic method for measuring concentration of chemical species.  United States: N. p., 2001. 
        Web.

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                    Autrey, S Thomas, Posakony, Gerald J, Amonette, James E, & Foster-Mills, Nancy S. Photoacoustic method for measuring concentration of chemical species.  United States.

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                    Autrey, S Thomas, Posakony, Gerald J, Amonette, James E, and Foster-Mills, Nancy S. Mon .  
        "Photoacoustic method for measuring concentration of chemical species".  United States.  https://www.osti.gov/servlets/purl/873774.

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@article{osti_873774,

  title        = {Photoacoustic method for measuring concentration of chemical species},

  author       = {Autrey, S Thomas and Posakony, Gerald J and Amonette, James E and Foster-Mills, Nancy S},

  abstractNote = {The present invention is a transducer for photoacoustic detection having at least two piezoelectric elements wherein at least a first piezoelectric element has a first frequency and at least a second piezoelectric element has a second frequency. The improvement according to the present invention is that at least two piezoelectric elements are longitudinal elements for longitudinal waves; and the first frequency is different from said second frequency. In other words, the invention is a multi-frequency longitudinal transducer for photoacoustic detection.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {2001},

  month        = {1}

}

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Works referenced in this record:

A Pulsed Photoacoustic Microcalorimeter for the Detection of Upper Excited-State Processes and Intersystem Crossing Yields
journal, July 1989

Lynch, Daniel; Endicott, John F.
Applied Spectroscopy, Vol. 43, Issue 5
https://doi.org/10.1366/0003702894202355

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Similar Records

Title: Photoacoustic method for measuring concentration of chemical species

Abstract

Citation Formats

A Pulsed Photoacoustic Microcalorimeter for the Detection of Upper Excited-State Processes and Intersystem Crossing Yields journal, July 1989

A Pulsed Photoacoustic Microcalorimeter for the Detection of Upper Excited-State Processes and Intersystem Crossing Yields
journal, July 1989