The present inventive concept relates to a method (100) for identifying a set of candidate substances of a sample (10) using a Raman spectroscopy device (200). The method (100) comprises recording (120) a Raman spectrum using an exposure time, and recording (162) a further Raman spectrum using a further exposure time. The further Raman spectrum may exhibit Raman peaks not recorded/detected in the Raman spectrum which possibly reduces the set of candidate substances. If necessary, one or more additional Raman spectra are recorded to further reduce the set of candidate substances, such that a single candidate substance eventually remains, thereby deemed to be a substance of the sample (10). A Raman spectroscopy device (200), a computer program and a non-transitory computer-readable storage medium are also provided.