Agilent Technologies 1260 - Page 132

132 Agilent 1260 Infinity DAD and MWD User Manual
6 How to optimize the Detector
Optimizing Selectivity
Figure 61 Selectivity by Ratio Qualifiers
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
1
) and 224 nm (λ
2
) were found from the spectra shown in Figure 60
on page 131. The ratio range was set at 2 – 2.4 (2.2 ±10%). Only when the ratio
between 249 and 224 nm was within this range, is the signal plotted. Of all
four peaks, only the third fulfilled the criterion (Figure 61 on page 132). The
others were not plotted.
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