Bruker M1 MISTRAL, Руководство пользователя

Страница: 26 / 122

Functional Principles
26
User Manual
Procedure Spectrum
2 Element identification
Element identification is usually an
iterative process where recorded
peak positions are compared to the
energetic positions of each elements
X-ray fluorescence lines as listed in
a database.
3 Background correction
The spectral background is identified
and subtracted from the spectrum for
the subsequent evaluation.
4 Deconvolution
Some combinations of elements
within a sample can lead to a strong
overlap of fluorescence lines. In
order to determine the actual
intensity of each individual element,
peak profiles and emission line
series are fitted into the spectrum.
As a result peak areas for each
elements fluorescence lines are
obtained.
5 Statistical error Sigma
For every fluorescence line the
statistical error of the deconvolved
peak is determined.
BG i i
N N
 

σ
i
= standard deviation for the peak area
N
i
= counts accumulated in the netto peak area of element i
N
BG
= counts accumulated in the peak background