Device for spectroscopic analysis of a sample and method analyzing a sample by means of such a device

Device for analysing a heterogenous sample, said device comprising:

• a measurement module comprising:
• a reservoir configured to accommodate said sample and equipped with a first wall and a second wall opposite the first wall,
• a first infrared spectroscopy subassembly comprising a first excitation source configured to emit an electromagnetic radiation in the infrared and/or the near-infrared field to the first wall of the reservoir, said first wall being transparent for infrared electromagnetic radiation, and first means for acquiring transmittance spectra,
• a second fluorescence spectroscopy subassembly comprising at least one second excitation source configured to emit an electromagnetic radiation in the ultraviolet and/or visible field to the second wall of the reservoir, said second wall being transparent for the electromagnetic radiations, such that the a volume of the sample which is illuminable by the first excitation source corresponds at least partially to a volume of the sample which is illuminable by the second excitation source, and second means for acquiring fluorescence spectra of said sample,
• the first subassembly comprising a diffusing and transparent optical element for the electromagnetic radiation emitted by said first excitation source, said optical element being positioned between the first excitation source and the first wall of the reservoir or between the second wall of the reservoir and the first means for acquiring transmittance spectra, outside of an optical path of the electromagnetic radiation emitted by the second excitation source and outside of a solid angle for collecting a fluorescence signal emitted by the sample when the electromagnetic radiation emitted by the second excitation source is exposed, and
• a processing module connected to the measurement module by a communication network and comprising a processor configured to analyse data obtained by infrared spectroscopy and fluorescence spectroscopy.