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MS Method Parameters
Table 6-9 MS Method Parameters
Experiment
Definition
Parameter
TOF MS, TOF MSMS, Q1, SWATH, MRM
HR, IDA
User-defined duration of the MS method.
Method duration
TOF MS, TOF MSMS, Q1, SWATH, MRM
HR, IDA
The time required to execute each cycle. Includes
experimental times and overhead (the switching
time between mass ranges and between
experiments). Use the total scan time to estimate
the number of points across the LC peak to obtain
better quantitation results.
Total scan time
TOF MS, TOF MSMS, IDA, MRM HR,
SWATH
Click to add an experiment.
Add Experiment
TOF MS, TOF MSMS, Q1, SWATH, MRM
HR, IDA
The software calculates how many cycles are
performed based on the value in the Method
duration field.
Estimated cycles
IDA, SWATH
Software automatically calculates the collision
energy based on the
m/z
values and the charge
states for optimal performance.
Dynamic Collision
Energy
TOF MS, TOF MSMS, IDA, SWATH, MRM
HR
Shown when the Apply intact protein mode feature
is selected. Select this feature when analyzing intact
proteins that are larger than 10 KDa.
Intact protein
mode
TOF MS, TOF MSMS, IDA, SWATH, MRM
HR
Select this feature when analyzing intact proteins
that are larger than 70 KDa. For example,
monoclonal antibodies.
Large proteins
(>70 kDa)
TOF MS, TOF MSMS, IDA, SWATH, MRM
HR
Select to decrease the signal from singly-charged
background ions without significantly impacting
the signal from multiply-charged proteins. This
feature improves the signal-to-noise ratio for
analyses with multiple charges.
Decrease detector
voltage
Source Parameters
TOF MS, TOF MSMS, Q1, IDA, SWATH,
MRM HR
Specify the gas flow between the curtain plate and
the orifice plate. Curtain Gas
TM
interface flow
prevents the contamination of the ion optics.
Curtain gas
SCIEX X500 QTOF System
System User Guide
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RUO-IDV-05-2334-E
Operating Instructions—Software