4
Using the Module
Operational Parameters
Agilent InfinityLab ELSD User Manual
48
Operational Parameters
Method
The ELS Detector has 10 onboard preset methods. These methods comprise
evaporator and nebulizer temperatures and gas flow, which can be optimized for
specific applications.
These 10 onboard methods are selected using the front keypad and screen, via
the
METHOD
option.
In addition to the 10 on-board preset methods, the ELS Detector has a method
XXX
that allows modification of the ELSD parameters to be made without the
need for software control. Method
XXX
allows the detector to be used in
standalone mode via the front screen and keypad.
Loading a Method
To load one of the 10 onboard methods, highlight
METHOD
. Using the arrow keys
scroll up or down to the required method number. The instrument will
acknowledge the change by displaying the method number in the top-left corner.
These on-board methods cannot be edited.
Evaporator Temperature
The evaporator temperature is the most important setting on the ELS detector. It
should be set according to the volatility of the compounds being analyzed.
If the compound is nonvolatile, e.g. sugars, then the evaporator temperature
should be set to 80 – 90 °C.
If the compound is semivolatile, or has a low molecular weight, e.g.
pharmaceutical drug, then the evaporator temperature should be set between
20 – 30 °C.
The evaporator temperature ranges for the ELS models are as follows:
The default evaporator temperature for both models is 40 °C.
G4260B/G7102A ELSD with non-cooled option
OFF, 25 – 120 °C (1 °C increments)
G7102A ELSD with cooled option
OFF, 10 – 80 °C (1 °C increments)
