FIG. 3.

External validation of databases containing 45 or 959 average reference spectra recorded with FT-IR microspectroscopy (microscope) and FT-IR macrospectroscopy (samplewheel). If the first hit belonged to an average spectrum of the same species and had an SD of ≤1.0, the result was counted as a correct identification at the species level. If the first hit belonged to a spectrum of the same genus but to a different species, identification was correct at the genus level. Identifications with SD of >1.0 in the first hit were counted as not identified. Results with incorrect identification in the first hit were noted as misidentifications. Abbreviations: 45/45, database consists of 45 average spectra and all 45 spectra were subjected to the external validation; 45/959, database consists of 959 average spectra and 45 spectra were identified against this database.