Agilent Technologies 1100 Series Wartungshandbuch Seite 32

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32 1100 Series DAD and MWD Reference Manual
2 How to optmize the Detector
5 Setting the slit width
Use 4 nm slit for normal applications.
Use narrow slit (e.g 1 nm) if your analytes have narrow absorbance
bands and for high concentrations.
Use a wide slit (e.g. 16 nm) to detect very low concentrations.
spectral resolution, sensitivity and
linearity.
Optimizing spectral acquisition (DAD only)
Select spectra acquisition mode according to your needs (see “Options
for storing spectra” on page 42).
Set the spectral wavelength range (for colorless samples 190...400 nm
is sufficient).
Set step to 4 nm for normal use; set small step (and slit width) if high
resolution of spectra with fine structure is wanted.
Table 4 Optimization Overview, continued
Parameter Impact
Figure 7 Choosing a Flow Cell
Typical column
length
Typic al p ea k
width
Recommended flow cell
T<= 5 cm
10 cm
20 cm
>= 40 cm
0.025 min
0.05 min
0.1 min
0.2 min
Typical flow
rate
Internal column diameter
0.01 ... 0.2
ml/min
0.2 ... 0.4
ml/min
0.4 ... 0.4
ml/min
1 ... 2 ml/min
0.5 ... 1 mm 2.1 mm 3.0 mm 4.6 mm
High pressure
flow cell for
pressures
above 100 bar
0.01 ... 5
ml/min
500 nl
flow cell
Semi-mirco
flow cell
Standard
flow cell
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