Agilent Technologies 1100 Series User Manual page 105

Figure 61
Figure 62
In a four-component mixture, only biphenyl was recorded. The other three
peaks were suppressed because they did not meet the ratio-qualifier criterion
and therefore the output was set to zero. The characteristic wavelengths
249 nm (λ
1100 Series DAD and MWD User Manual
WL2
WL1
Wavelength (nm)
Wavelength Selection for Ratio Qualifiers
Biphenyl
Time (min)
Selectivity by Ratio Qualifiers
) and 224 nm (λ ) were found from the spectra shown in
1 2
How to optimize the Detector
Select 2 characteristic
wavelengths
Signal = WL1/WL2 20%
o-Terphenyl
Biphenyl
Signals at 250 nm
o-Terphenyl
No selectivity
With ratio qualifier
250/222 nm = 3.5
5
20%
Figure 61.
105