A method for characterising compounds of interest introduced into a measuring chamber of an electronic nose including at least one sensitive site (6 k) having receptors with which the compounds of interest are able to interact by adsorption/desorption, the process including the following steps: o injecting, into the measuring chamber: • during a first phase P1, a first gas sample formed of a carrier gas without the compounds of interest, then • during a second phase P2, a second gas sample formed of at least the carrier gas and said compounds of interest; o determining, during said phases P1 and P2, a measurement signal ( S k ( t i)) representative of the interactions between the gas sample in presence and the receptors of the sensitive site (6 k), at different measurement time points t i, in response to an excitation signal emitted at the sensitive site (6 k); ∘ characterised in that it further includes the following steps: ∘ measuring (120; 220): • a value φ1 of the relative humidity φ in the measuring chamber during the first phase P1, and • a value φ 2 of the relative humidity φ during the second phase P2, φ 2 being different from φ 1; o determining (130; 230) a corrective parameter ( S ̃ k ref | φ 2; Δ S ̃ k ref | Δ φ) associated with the sensitive site (6 k), from: • at least the measured value φ 2 of the relative humidity, and • a calibration function ( f k, h k) predetermined and associated with the sensitive site (6 k), the calibration function ( f k, h k) expressing a variation of a parameter ( S ̃ k ref; Δ S ̃ k ref) representative of the measurement signal associated with the first gas sample as a function of the relative humidity ( φ; Δφ); ∘ determining a useful signal ( Su k ( t i ∈ P 2)) by correction of the measurement signal ( S k ( t i ∈ P 2)) associated with the second gas sample from at least the determined corrective parameter ( S ̃ k ref | φ 2; Δ S ̃ k ref | Δφ) and characterising the compounds of interest from the useful signal ( Su k ( t i ∈ P 2)). o injecting, into the measuring chamber: • during a first phase P1, a first gas sample formed of a carrier gas without the compounds of interest, then • during a second phase P2, a second gas sample formed of at least the carrier gas and said compounds of interest; • during a first phase P1, a first gas sample formed of a carrier gas without the compounds of interest, then • during a second phase P2, a second gas sample formed of at least the carrier gas and said compounds of interest; o determining, during said phases P1 and P2, a measurement signal ( S k ( t i)) representative of the interactions between the gas sample in presence and the receptors of the sensitive site (6 k), at different measurement time points t i, in response to an excitation signal emitted at the sensitive site (6 k); ∘ characterised in that it further includes the following steps: ∘ measuring (120; 220): • a value φ1 of the relative humidity φ in the measuring chamber during the first phase P1, and • a value φ 2 of the relative humidity φ during the second phase P2, φ 2 being different from φ 1; o determining (130; 230) a corrective parameter ( S ̃ k ref | φ 2; Δ S ̃ k ref | Δ φ) associated with the sensitive site (6 k), from: • at least the measured value φ 2 of the relative humidity, and • a calibration function ( f k, h k) predetermined and associated with the sensitive site (6 k), the calibration function ( f k, h k) expressing a variation of a parameter ( S ̃ k ref; Δ S ̃ k ref) representative of the measurement signal associated with the first gas sample as a function of the relative humidity ( φ; Δφ); ∘ determining a useful signal ( Su k ( t i ∈ P 2)) by correction of the measurement signal ( S k ( t i ∈ P 2)) associated with the second gas sample from at least the determined corrective parameter ( S ̃ k ref | φ 2; Δ S ̃ k ref | Δφ) and characterising the compounds of interest from the useful signal ( Su k ( t i ∈ P 2)). ∘ measuring (120; 220): • a value φ1 of the relative humidity φ in the measuring chamber during the first phase P1, and • a value φ 2 of the relative humidity φ during the second phase P2, φ 2 being different from φ 1; • a value φ1 of the relative humidity φ in the measuring chamber during the first phase P1, and • a value φ 2 of the relative humidity φ during the second phase P2, φ 2 being different from φ 1; o determining (130; 230) a corrective parameter ( S ̃ k ref | φ 2; Δ S ̃ k ref | Δ φ) associated with the sensitive site (6 k), from: • at least the measured value φ 2 of the relative humidity, and • a calibration function ( f k, h k) predetermined and associated with the sensitive site (6 k), the calibration function ( f k, h k) expressing a variation of a parameter ( S ̃ k ref; Δ S ̃ k ref) representative of the measurement signal associated with the first gas sample as a function of the relative humidity ( φ; Δφ); • at least the measured value φ 2 of the relative humidity, and • a calibration function ( f k, h k) predetermined and associated with the sensitive site (6 k), the calibration function ( f k, h k) expressing a variation of a parameter ( S ̃ k ref; Δ S ̃ k ref) representative of the measurement signal associated with the first gas sample as a function of the relative humidity ( φ; Δφ); ∘ determining a useful signal ( Su k ( t i ∈ P 2)) by correction of the measurement signal ( S k ( t i ∈ P 2)) associated with the second gas sample from at least the determined corrective parameter ( S ̃ k ref | φ 2; Δ S ̃ k ref | Δφ) and characterising the compounds of interest from the useful signal ( Su k ( t i ∈ P 2)).