Chemistry: analytical and immunological testing – Measurement includes change in volume or pressure
Patent
1991-02-12
1993-12-14
Johnston, Jill A.
Chemistry: analytical and immunological testing
Measurement includes change in volume or pressure
422 67, 422 681, 422 81, 436158, 436181, G01N 2514
Patent
active
052702189
ABSTRACT:
An analytical method which comprises sampling a predetermined amount of a liquid sample, bringing the sample to a vapor-liquid equilibrium at a predetermined temperature and pressure, separating the resultant gaseous and liquid fractions from each other, and analyzing the gaseous fraction as a gas sample and the liquid fraction as a liquid sample, and an apparatus for practicing the analytical method. By this method or apparatus, the light and heavy fractions of a substance can be simultaneously analyzed in composition and chemical structure. This enables the modification and the service life of a chemical substance like a lubricating oil, in which the qualities may change with the passage of time, to be estimated or foreseen.
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Idemitsu Kosan Co. Ltd.
Johnston Jill A.
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