Characterization of CO2 Laser Photoacoustic Spectrometer Intracavity Configuration and Its Application in Measuring Acetone Gas in Human Breath
Penulis/Author
Prof. Dr. Mitrayana, S.Si., M.Si. (1); NURUL MUYASAROH (2); Dr. Moh. Ali Joko Wasono, M.S. (3); dr. Mohammad Robikhul Ikhsan, Sp.PD., K-EMD., M.Kes. (4)
Tanggal/Date
2017
Kata Kunci/Keyword
Abstrak/Abstract
Photoacoustic spectrometer is a very effective instrument for detecting low concentration gasses. In this research, a CO2 laser photoacoustic spectrometer intracavity configuration was characterized and applied for measuring acetone gas concentration in human exhaled breath during exercise on a treadmill. The characterization included laser power optimation, scanning laser spectrum, making resonant curve and quality factor, measuring noise and background signal, determining lowest detection and linearity curve. Acetone gas concentration was determined by analyzing normalized photoacoustic signal using multicomponent matrix. The optimum power was obtained at 32.4 ± 0.5 W and CO2 laser spectrum consisted of four line groups. The highest laser absorption line of standard acetone gas was determined at 10P20. Quality factor was obtained at 14.6 ± 0.6, noise at 1.7 ± 0.2 ?V/Hz1/2, background signal at 10P20
0.001 to 0.004 mV, lowest detection limit of acetone gas at 110 ± 14 ppbV, and acetone gas linearity gradient on 10P20 was at ????????22 = 0.0140 ± 0.0007. Acetone gas concentration in human exhaled breath after exercising on treadmill decreased from 43 % to 79 % than before.
Rumpun Ilmu
Fisika
Bahasa Asli/Original Language
English
Level
Internasional
Status
Dokumen Karya
No
Judul
Tipe Dokumen
Aksi
1
Characterization of CO2 Laser Photoacoustic Spectrometer 2017.pdf
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7_cekturnitin_Characterization of CO 2 Laser Photoacoustic Spectrometer Intracavity Configuration and Its Application in Human Breath.pdf
