4-83
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)
Typical values of Sensitivity (Cool Mode)
NOTE 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).
Parameter Typical Value Adjustment
RF Power (W) 600 Normally use 600
Sampling Depth (mm) 18 Normally use 18
Carrier Gas (L/min) 0.7 Normally use 0.7
Makeup Gas (L/min) 0.75 0.6 to 1.2
PeriPump 1 (rps) 0.1
S/C temp (
ºC)
2
Normally use at 2ºC
Extract 1 (V) -120 -200 to -60
Extract 2 (V) -6 -30 to 5
Omega Bias
-cs (V)
-80 -120 to -40
Omega Lens-cs (V)
85 to 10
Cell Entrance (V) -30 Normally use -30
QP Focus (V) -4 -10 to 5
Cell Exit (V) -50 Normally use -50
OctP RF (V) 140 100 to 200
OctPBias (V) -18 -30 to -10
QP Bias (V) -5 -6 to -3
Mass Count/1 ppb
Integration time = 0.1 sec.
RSD
59
Co
> 2000 < 15%
To Next Page
Loading...
