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/.


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    Title :

    Measurement of oxygen isotope ratios using tunable diode laser absorption spectroscopy


    Contributors:


    Publication date :

    2003-01-01


    Size :

    79191 byte




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



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