4-71
Agilent 7500 ICP-MS ChemStation Operator’s Manual
Tuning
Typical values of Tuning Parameters in the Standard Mode
(with ShieldTorch, Micro Flow Nebulizer, self-aspiration)
Typical values of Sensitivity (Standard Mode)
Parameter Typical Value Adjustment
RF Power (W) 1500 Normally used 1500
Sampling Depth (mm) 8 7 to 10
Carrier Gas (L/min) 0.8 0.6 to 1.0
Makeup Gas (L/min) 0.45 0.3 to 0.7
PeriPump 1 (rps) 0.1
S/C temp (
ºC)
2
Normally used at 2ºC
Extract 1 (V) 5.4 4 to 8
Extract 2 (V) -100 -150 to -60
Omega Bias-cs (V) -32 -45 to -25
Omega Lens-cs (V) 8.6 5 to 10
Cell Entrance (V) -26 -40 to -20
QP Focus (V) 2 -2 to 5
Cell Exit (V) -30 -45 to -20
OctP RF (V) 150 100 to 200
OctPBias (V) -6 -12 to -6
QP Bias (V) -3 -5 to -3
Mass Count/1 ppb
Integration time = 0.1 sec.
RSD
7
Li
> 4000 < 15%
89
Y
>12500 < 15%
205
Tl
>6000 < 15%