Fig. 1

(A) Schematic diagram of sample embedding. (B) Embedded samples. (C) Schematic diagram of the LIBS detection experimental setup. (D) Typical averaged spectra for each type of samples.
(A) Schematic diagram of sample embedding. (B) Embedded samples. (C) Schematic diagram of the LIBS detection experimental setup. (D) Typical averaged spectra for each type of samples.