Agilent Technologies 7500 ICP-MS User Manual

4-73
Agilent 7500 ICP-MS ChemStation Operator’s Manual
Tuning
i. If the sensitivity is low, change the Omega Bias-cs and the Cell Exit to a
lower voltage. In this case, sometimes, the background may increase.
Monitor the background when adjusting.
Typical values of Tuning Parameters in the H
2
Mode
(with ShieldTorch, Micro Flow Nebulizer, self-aspiration)
Typical values of Sensitivity (H
2
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)
-40 -50 to -30
Omega Lens-cs (V)
8.6 5 to 10
Cell Entrance (V) -30 -50 to -30
QP Focus (V) -12 -20 to 0
Cell Exit (V) -40 -80 to -20
OctP RF (V) 180 100 to 200
OctPBias (V) -18 Normally used -18
QP Bias (V) -3 -Normally used -16
H
2
Gas (ml/min) 4.5 3 to 6
Mass Count/1 ppb
Integration time = 0.1 sec.
RSD
59
Co
> 1500 < 15%
89
Y
>8000 < 15%
205
Tl
>7000 < 15%

Agilent Technologies 7500 ICP-MS Specifications

General

Brand	Agilent Technologies
Model	7500 ICP-MS
Category	Laboratory Equipment
Language	English