Method for analysing hydrocarbons

A method for analysing a sample of hydrocarbons, comprising:

• implementing a gas chromatography separation according to a first controlled temperature profile, to separate the sample into analytes;
• and
• detecting at least one of said analytes by measurement of a variation of a resonance frequency of at least one resonator of nano-electromechanical system (NEMS) type covered with a functional layer made to vibrate at the resonance frequency thereof, under an effect of an adsorption or desorption of the at least one of said analytes by the functional layer,
• wherein the at least one resonator is subjected to a second controlled temperature profile, lower than the first profile,
• wherein the at least one resonator is encapsulated in a temperature regulated chamber, said chamber comprising a temperature regulating unit configured to make the temperature vary inside the chamber in a controlled manner so as to subject the at least one resonator to the second controlled temperature profile,
• wherein a chromatography column used in the gas chromatography separation is encapsulated in a chamber thermally decoupled from the chamber in which the at least one resonator is encapsulated.