کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9754985 | 1494897 | 2005 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Application of laser photoacoustic spectroscopy for the detection of water vapor near 1.38 μm
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Application of laser photoacoustic spectroscopy for the detection of water vapor near 1.38 μm Application of laser photoacoustic spectroscopy for the detection of water vapor near 1.38 μm](/preview/png/9754985.png)
چکیده انگلیسی
Laser photoacoustic (PA) spectroscopy is applied for the determination of the trace content of water vapor using a differential Helmholtz resonant (DHR) cell and a narrow bandwidth diode laser operating near 1380 nm. The PA spectroscopy revealed a rich absorption spectra in this wavelength region and the observed result was compared with the HITRAN database. A multipass optical system was also developed by adopting one aluminum-coated flat mirror with a small uncoated spot for the laser introduction to the detection chamber and one aluminum-coated concave mirror. The multipass optical system enabled the enhancement of the PA signal up to eight times when compared to the single pass case. The calibration curve was plotted by measuring PA signals for various pressures of the water vapor. The sensitivity of the PA detection system is estimated as 7.3Ã1012 molecules cmâ3 with a signal-to-noise ratio (SNR) of 1.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Microchemical Journal - Volume 80, Issue 2, June 2005, Pages 113-119
Journal: Microchemical Journal - Volume 80, Issue 2, June 2005, Pages 113-119
نویسندگان
Kyuseok Song, Seokwon Oh, Euo Chang Jung, Deokhyun Kim, Hyungki Cha,