Metode og anvendelse ved bestemmelse av mengde olje eller kondensat i vann eller i vandige prover ved hjelp av et ekstraksjonsmiddel

摘要

This invention consists of a method to use FTIR and a hydrocarbon-based solvent to extract oil and condensate components from water or water-based samples. The extract is concentrated and directly analyzed in the FTIR. Surprisingly enough, this invention has also shown that there exist one or more selective spectral areas ranging from 400 to 4000 cm^-1 and which are suited to quantify the amount of oil-/condensate components. Once these have been determined, quantitative routine methods may then be developed. Calibration is carried out by spiking oil and condensate-free water samples, or through the help of an almost similar standard addition on real process samples, or through calibration pursuant to standard methods.