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
2003-01-01
79191 byte
Conference paper
Electronic Resource
English
Measurement of oxygen isotope ratios using tunable diode laser absorption spectroscopy
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