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다이오드 레이저 흡수분광법을 이용한 산소 동위원소의 성분비 측정

Measurement of oxygen isotope ratio using tunable diode laser absorption spectroscopy

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초록

Abstract

Tunable diode laser absorption spectroscopy was performed for analysis of the H2 18O/H2 16O isotope ratio of a water sample which was enriched by the membrane distillation method. In order to improve the signal-to-noise ratio, the wavelength modulation spectroscopic method was used with a lock-in amplifier. The fringe noise could be suppressed by using the FFT (Fast Fourier Transform) lowpass filter and the optimization of the modulation depth of the laser frequency. The maximum deviation of d-value was measured to be ±41.

참고문헌 (11)

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  11. "Novel etalon fringe rejectiontechnique for laser absorption spectroscopy", 31, pp.4998~24 5002 (1992)

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