1220 Infinity II LC System User Manual 127
Detector Description
8
Agilent 1220 Infinity II LC Diode Array Detector (DAD)
Figure 40 Gradient Analysis of PTH-Amino Acids (1 pmol each), with and without
Reference
Slit Width
The detector has a variable slit at the entrance of the spectrograph. This is an
effective tool to adapt the detector to changing demand of different analytical
problems.
A narrow slit provides spectral resolution for analytes with very fine
structures in the absorbance spectrum. An example of such a spectrum is
benzene. The five main absorbance bands (fingers) are only 2.5 nm wide and
just 6 nm apart from each other.
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