System and method for determining the chemical composition of compounds contained in a sample

A system for separating into at least one of liquid and gas phases compounds contained in a sample, comprising:

• i. a first device comprising at least one oven for carrying out at least one heating sequence in an inert atmosphere according to a predetermined sequence of temperatures, means for separating into at least two parts an effluent resulting from the heating in an inert atmosphere, and means for continuous measurement of at least one amount of hydrocarbon compounds contained in a first part of the effluent;
• ii. a first experimental setup configured to be connected to the first device when the first device is in operation, comprising means for circulating a second part of the effluent from the first device towards means for collecting the second part of the effluent;
• and
• iii. a second experimental setup configured to be connected to the first experimental setup when the first device is no longer in operation, comprising means for providing vacuum circulation of the second part of the effluent collected by the first experimental setup towards means configured for separating the second part of the effluent into at least one of liquid and gas phases a collected second part of the effluent.