1. Introduction
Laser-induced breakdown spectroscopy (LIBS) has become an
attractive and popular technique in the field of chemical analysis.
In addition to the positive characteristics of solid sampling techniques,
LIBS allows simultaneous multi-element determination
and in situ analysis, since portable instruments are available. For
all these reasons, LIBS has been considered a possible future ‘superstar’
of spectrometric techniques [1]. Despite all its advantages,
LIBS has some limitations: sensitivity and precision are poor since
a very low sample mass size is commonly used (