Interferogram
(Ɵme domain)
y
t
i
s
n
e
t
n
I
Mirror speed [mms -1 ]
IR-spectrum
(frequency domain)
]
%
[
D
Wave number [cm
-1
]
Fourier transformaƟon
Fig. 4.43 Scheme of Fourier Transformation in FTIR
NaCl plate
solution with analytes
NaCl window
gaseous analytes
KBr pellet
embedded
analytes
Solids
Gases
Liquids
IR beam
Fig. 4.44 Types of sample holders for IR spectroscopy
82
4 Instrumental Analysis