3. Results and discussion
3.1. Spectra
The LIBS spectra of fingernails in the spectral regions of interest
are shown in Fig. 1. Spectrum “a” shows the Ti lines used for
temperature calculation, spectrum “b” shows the Hα line used to
calculate electron number density, spectrum “c” shows Ca ion lines
at 393.4 and 396.8 nm, spectrum “d” shows Mg atom (285.2 nm)
and ion (279.6 and 280.3 nm) lines as well as a neighboring Si line,
and spectrum “e” shows the Zn atom lines at 472.2 and 481.0 nm.
The lines used for calibration are the ones that appear in Table 1