Specifications

T
ypical Column
Length (cm)
T
ypical Peak
Width Recommended Flow Cell
< = 5 0.025
Micro
Flow Cell
High Pressure
Flow Cell
For Pressure
Above 100 bar
10 0.05
Semimicro
Flow Cell
20 0.1
Standard
Flow Cell
> = 40 0.2
Typical Flow Rate
0.05 - 0.2 ml/min 0.2 -0.4 ml/min 0.4-0.8 ml/min 1-2 ml/min 0.05 - 5 ml/min
Internal Column Diameter 1.0 mm 2.1 mm 3.0 mm 4.6 mm
www.agilent.com/chem
•
800 227 9770
36
DETECTORS
VWD Flow Cell Selection
Choosing the Optimal Flow Cell For
Your Variable Wavelength Detector
Agilent offers four flow cell options for the
VWD. Use the chart below to select the
appropriate one for your application,
keeping the following guidelines in mind:
●
If more than one selection is appropriate,
choose the
larger flow cell to get the
best detection limit.
●
For columns capable of providing
narrower peak widths (1.8 µm particle
size), the
smaller flow cell may be
more appropriate.
Variable Wavelength Detector
It is critical to verify the function of the
V
WD on a regular basis.
T
here are two
built-in tests to help you accomplish this:
●
The wavelength calibration test.
●
The lamp intensity test. If the lamp
intensity has diminished more than is
t
olerable for your application, you will
need to replace the lamp.
Additionally, you should perform the
following routine maintenance procedures:
●
Check the waste outlet.
●
Clean the leak sensor.
●
Check the photocurrent.
●
Clean or replace the flow cell windows
when they become dirty.
●
Flow cells with longer path lengths
provide better signal detection.
However, a longer path length also
increases the cell volume, which
causes more peak dispersion.
Description Part No. Price ($)
G1314A VW detector accessory kit
Includes 1/4 in waste tubing, 2 hex keys,
2
wrenches, outlet tubing,
1/16 in PEEK male fitting
G
1314-68705 116
D
euterium lamp (1000 hours) G1314-60100 531
Deuterium longlife lamp 2140-0813 852
VWD inlet tubing with fitting,
0.18 x 40 mm, PEEK
5062-8522 33
VWD outlet tubing with fitting,
0.25 x 48 mm, PEEK
5062-8535 52