Patent ID: 7075652
Filing Date: 2006-07-11
Classification: G01N

Abstract:
1. An apparatus for measuring a temperature-dependent optical property of a liquid comprising: a first holding cell to contain said liquid, said holding cell defining a first temperature point and a second temperature point, a temperature control system adapted to bring a temperature of said first temperature point to and maintain it at a predetermined first temperature level, said temperature control system further adapted to independently and at the same time bring a temperature of said second temperature point to and maintain it at a predetermined second temperature level, whereby defining the difference between said first and said second temperature levels as a temperature gradient between said first temperature point and second temperature point within said holding cell, and an optical system adapted to interrogate said liquid contained in said holding cell at a point of measurement and obtain said temperature-dependent optical property, said point of measurement having a known geometrical position relative to said first temperature point and said second temperature point of said holding cell, whereby the temperature of said liquid at said point of measurement is defined by said temperature gradient and said known geometrical position of said point of measurement relative to said first temperature point and said second temperature point of said holding cell.