Tunable diode laser absorption spectroscopy was performed for analysis of oxygen isotope ratio in water sample enriched by the membrane distillation method. To enhance the signal-to-noise ratio, the wavelength modulation spectroscopic method was employed with a lock-in amplifier. Fringe noises were suppressed by a FFT (Fast Fourier Transform) low-pass filter and the optimized modulation depth of the laser frequency. The maximum deviation of measured /spl delta/-value was /spl plusmn/4/sup 0///sub 00/.
Measurement of oxygen isotope ratios using tunable diode laser absorption spectroscopy
01.01.2003
79191 byte
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
Measurement of oxygen isotope ratios using tunable diode laser absorption spectroscopy
British Library Conference Proceedings | 2003
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