Agilent Triple Quadrupole MS and Sensitivity 3
Collision cell
Agilent 6400 Series Triple Quad LC/MS Concepts Guide 61
The figure shows that the higher the mass the longer it takes to
evacuate the collision cell. For example, m/z 922 takes about
600 µsec to evacuate the collision cell using the linear potential,
while m/z 118 only takes 350 µsec. This also demonstrates the
low degree of crosstalk since the Y axis is logarithmic, showing
complete clearance of the cell. This means that an inter-scan
delay of 5 msec will be more than adequate to flush the collision
cell of all ions.
Figure 29 Collision cell clearing profile (500 pg Alprazolam, 20 ms dwell
time)
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