Agilent Technologies 7500 ICP-MS Operator's Manual page 126

Agilent 7500 ICP-MS ChemStation Operator's Manual
Tuning
h.(Background Check) Aspirate fresh DI water and measure the background
of mass (56 amu and 78 amu), which is to be measured in H
count of 56 amu and 78amu is too high, increase 0.4 mL/min of H
and then repeat step e to step g.
Typical values of Tuning Parameters in the H
(with ShieldTorch, MicroMist Nebulizer)
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)
-ce
Omega Bias (V)
-ce
Omega Lens
Cell Entrance (V)
QP Focus (V)
Cell Exit (V)
OctP RF (V)
OctPBias (V)
QP Bias (V)
H Gas (ml/min)
2
Typical values of Sensitivity (H
Mass
89
Y
2 Adjustment of H gas flow
2
4-50
Typical Value
1500
8
0.9
0.15
0.1
2
4.0
-140
-22
1.2
(V)
-26
-15
-30
150
-18
-3
5
Mode)
2
Count/1 ppb
Integration time = 0.1 sec.
>2000
mode. If the
2
Mode
2
Adjustment
Normally used 1500
7 to 10
Normally used 0.9
0.1 to 0.3
ºC
Normally used at 2
2 to 6
-140 to -110
-30 to -16
-2 to 3
-40 to -20
-20 to 0
-80 to -20
100 to 200
Normally used -18
-Normally used -16
3 to 6
RSD
< 15%
flow rate,
2