Product description
Memosens Wave CAS80E
8
Hauser
200
300
400
500
600
700
A
λ/nm
3
1
2
800
a
B
C
A0042861
2
Ranges of parameters in the absorption spectrum
λ
Wavelength range
A
Absorption
B
Ultraviolet light (UV)
C
Visible light (VIS)
a
254 nm, SAC
1
Nitrate, nitrite
2
Sum parameters BODeq, CODeq, TOCeq, DOCeq
3
Color, turbidity, TSS
A specific absorption spectrum can be assigned to every molecule. By comparing a zero
spectrum I
0
determined previously in ultrapure water and the measuring spectrum with
the intensity I, the absorption A can be calculated as follows:
A = -log
10
(I/I
0
) = ε
.
c
.
d
The absorption A depends directly on the concentration c, the measurement gap length d
and the extinction coefficient ε.
Analytical models programmed into the spectrometer calculate the concentration of the
parameters from the absorption spectra. These analytical models have been determined by
correlating known parameter concentrations with their related absorption spectra.
The calculation uses the same wavelengths to determine different parameters. This results
in what are termed "cross-sensitivities". For example, if turbidity increases less light is
detected when determining the chemical oxygen demand (COD).
Summary of Contents for Memosens Wave CAS80E
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