ACCQPrep HP125
Section 5 PeakTrak
5-20
• Current Data Path — The top-left corner of the window
displays the path (current folder). As you browse
through the files, the path will update as you go.
• N
EW
— Click this button to add and name a subfolder
within the currently selected folder.
• D
ELETE
— Click this button to delete the selected folder.
• Folder selection box — This box lists the available
folders and selection buttons.
• OK — Click this button to save your selection as the
data path and close the window.
• C
ANCEL
— Click the C
ANCEL
button to close the window
without changing the data path
5.2.11 MS Method
Development
The MS->M
ETHOD
D
EVELOPMENT
menu command opens the
PurIon mass spectrometer method development window (PurIon
equipped systems only). This enables a user to test and verify
ionization conditions for their compound. This command is not
available from a remote connection. This window contains the
following controls:
• Polarity—On the PurIon system, this control changes
the probe polarity between positive and negative
ionization. On PurIon S and PurIon L systems, this
button toggles the displayed mass spectrum between
positive and negative ionization.
• Ion Settings– Allows selection of different ion settings to
maximize the intensity of the desired molecular ion. The
factory selections include “Robust”, for compounds that
do not easily ionize. “Typical” works well for most
compounds. The “Fragile” setting is used for those
compounds that are delicate or easily fragment. User
defined ion settings may also be loaded.
• Ion Finder- Identifies potential adducts and fragments
for the compound of interest when the compound of
interest does not show up in the spectrum graph. This
algorithm identifies the mass of the 10 most intense ions
and compares that to the desired compound’s molecular
weight. The difference in mass is compared to a table of
potential adducts or fragments. This list is displayed to
the user to determine if any of these potential adducts or
fragments corresponds to the mass of interest and could
be used as the detection ion.
• Detection Ions—After a spectrum is collected, clicking
on a peak adds that ion to this control. Alternately,
masses can be entered using a keypad control.
• Clear Ions—clears the last value entered into the
Detection Ions control.
• Mass spectrum graph- this displays the mass spectrum.
There are two mass spectra displayed. The spectrum
depicted in blue shows what the PurIon is currently
detecting. The red spectrum depicts the largest peaks
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