detectors, usually limited to a maximum count of 5×104 cps. Taking
into account these facts and to improve the sensitivity of the signal,
the spectral data obtained by the WDXRF equipment were treated
using the deconvolution software (WinQXAS) [16], traditionally used
in EDXRF spectrometry, to obtain the peak areas. The total number of
counts increases considering the total peak area instead of only the
analytical line. This leads also to an improvement of sensibility and
detection limits.