The usual technique of the laser induced plasma
spectroscopy (LIPS) spectra analysis relies on the use
of calibration curves for quantitative measurements of
plasma composition. However, LIPS calibration curves strongly
depend on the material composition (the so-called matrix
effect); thus, this standard approach to the LIPS spectra
analysis is inadequate when precise information on unknown
samples composition is required. In this paper we present
a new procedure, based on LIPS, for calibration-free quantitative
elemental analysis of materials. The new procedure, based
on an algorithm developed and patented by IFAM-CNR, allows
the overcoming of the matrix effect, yielding precise and
accurate quantitative results without the need of calibration
curves.