Inline liquid concentration measurement in nanoliter volume using fiber-optic low-coherence interferometry

[摘要]：A method for inline measurement of composition of binary liquid mixture in a nanoliter volume is presented. Low-coherence interferometric technique, based on fiber-optic Mach-Zehnder interferometer, is applied for measuring the liquid refraction index, from which its volume fractions are found. The accuracy of volume fractions measurement, of about +/- 0.5 %, was predominantly determined by the accuracy of reading the position of mechanical scanner. The data rate of about 1.5 Hz was also limited by mechanical scanning.

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