Agilent Technologies Agilent 1260 Infinity System User's Manual page 19

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The Agilent 1260 Infinity Binary LC - Product Description
System Components
1260 Infinity Diode Array Detector (G4212B)
The 1260 Infinity Diode- Array Detector (DAD) is a new optical design
using a cartridge cell with optofluidic waveguide technology, offering high
sensitivity with low dispersion, a wide linear range, and a very stable
baseline for standard or ultra- fast LC applications. The Agilent Max- Light
cartridge cell dramatically increases the light transmission by utilizing the
principle of total internal reflection along a non- coated fused silica
capillary, achieving a new level of sensitivity without sacrificing resolution
through cell volume dispersion effects. This design minimizes baseline
perturbations that are caused by refractive index or thermal effects and
results in more reliable integration of peak areas.
Figure 5 The light path through the DAD
The module also incorporates electronic temperature control to further
enhance the resistance to ambient temperature effects. Although the
hydraulic volume of the Max- Light cartridge cell is very small, the path
length is a standard 10 mm. However, for even higher sensitivity the
alternative Agilent Max- Light high sensitivity cell is available with a path
length of 60 mm. Cells are easily exchanged by sliding them in or out of
the cell holder and they are auto- aligned in the optical bench. The DAD
light source is a deuterium lamp and the operating wavelength range that
is covered is 190 to 640 nm. This is detected by a diode- array comprising
1024 diodes. The entrance to the spectrograph is through a fixed optical
slit of 4 nm.
1260 Infinity Binary LC - System User Guide 19