Agilent Technologies 7500 ICP-MS Operator's Manual page 159

N O T E
Agilent 7500 ICP-MS ChemStation Operator's Manual
Tuning
Typical values of Tuning Parameters in the Cool Mode
(with ShieldTorch, Micro Flow Nebulizer, self-aspiration)
Parameter
RF Power (W)
Sampling Depth (mm)
Carrier Gas (L/min)
Makeup Gas (L/min)
PeriPump 1 (rps)
ºC
S/C temp ( )
Extract 1 (V)
Extract 2 (V)
-cs
Omega Bias (V)
-cs
Omega Lens (V)
Cell Entrance (V)
QP Focus (V)
Cell Exit (V)
OctP RF (V)
OctPBias (V)
QP Bias (V)
Typical values of Sensitivity (Cool Mode)
Mass
Integration time = 0.1 sec.
59
Co
When the plasma is 600 W, the plasma may turn off when the tune file is loaded
during the transition between Standby to Analysis mode. If this happens increase the
RF power in the tune screen to 800 W and then re try plasma ignition
It is also possible to tune in cool mode by using Autotune (Page 4-102).
Typical Value
600
18
0.7
0.75
0.1
2
-120
-6
-80
8
-30
-4
-50
140
-18
-5
Count/1 ppb
> 2000
Adjustment
Normally use 600
Normally use 18
Normally use 0.7
0.6 to 1.2
ºC
Normally use at 2
-200 to -60
-30 to 5
-120 to -40
5 to 10
Normally use -30
-10 to 5
Normally use -50
100 to 200
-30 to -10
-6 to -3
RSD
< 15%
4-83