Photoacoustic method for measuring concentration of chemical species
作者： Nancy S. Foster-Mills , James E. Amonette , S. Thomas Autrey , Gerald J. Posakony
DOI:
关键词:
摘要: The present invention is a transducer for photoacoustic detection having at least two piezoelectric elements wherein first element has frequency and second frequency. improvement according to the that are longitudinal waves; different from said In other words, multi-frequency detection.
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