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A sensitive cryogenic refractometer. Application to the refractive index determination of pure or mixed liquid methane, ethane and nitrogen.

Author(s) : BADOZ J., LE LIBOUX M., NAHOUM R., et al.

Type of article: Article

Summary

The determination of absolute values of the refractive index necessitates a calibration, therefore the accuracy is limited to 1.E(-3) index unit. Sensitivity and reproductibility are better: 5 x 1.E(-4) and could be improved to 1.E(-4). The refractive index of pure liquid methane was determined at several temperatures (91-106 K) and 670 nanometers. The results obtained agree with the published data. The refractive index of mixtures of liquid methane and ethane, with and without dissolved nitrogen, was also determined at 94 K and 150 kilopascal total pressure, for which conditions no data were previously available.

Details

  • Original title: A sensitive cryogenic refractometer. Application to the refractive index determination of pure or mixed liquid methane, ethane and nitrogen.
  • Record ID : 1993-1216
  • Languages: English
  • Source: Rev. sci. Instrum. - vol. 63 - n. 5
  • Publication date: 1992/05
  • Document available for consultation in the library of the IIR headquarters only.

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