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KMID : 1059520170610040139
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Journal of the Korean Chemical Society
2017 Volume.61 No. 4 p.139 ~ p.142
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Photoacoustic Effect of Ethene: Sound Generation due to Plant Hormone Gases
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Ide David W.
Park Han-Jung
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Abstract
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Ethene (C2H4), which is produced in plants as they mature, was used to study its photoacoustic properties using photoacoustic spectroscopy. Detection of trace amounts, with N2 gas, of C2H4 gas was also applied. The gas was tested in various conditions-temperature, concentration of the gas, gas cell length, and power of the laser- to determine their effect on the photoacoustic signal, the ideal conditions to detect trace gas amounts, and concentration of C2H4 produced by an avocado and a banana. A detection limit of 10 ppm was determined for pure C2H4. A detection of 5% and 13% (by volume) concentration of C2H4 was produced for a ripening avocado and banana, respectively, in closed space.
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KEYWORD
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Photoacoustic, Ethene, Trace detect, CO2 Laser, Resonance frequency
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