Hardware manual

Technical Information 6
Agilent 7500 Series ICP-MS Hardware Manual 6-7
PFA Concentric Nebulizer
The nebulizer is made of fluorocarbon resin (PFA) and the sample is
introduced by self- aspiration. The PFA concentric nebulizer can be used in
the same way as the concentric nebulizer and, since it is made of fluorocarbon
resin, it can be used for various types of samples such as strong acid, strong
base and organic solvent. However, when such samples are introduced, please
use the Inert Sample Introduction Kit.
Sample uptake is 200 μL/min and carrier gas should be adjusted in the range
of 0.6
~
1.2 L/min. Please use PFA sample tubing of the following
specifications with the PFA concentric nebulizer:
OD 1.6 mm with length of approximately 700 mm.
OD 1.6 mm with length of approximately 700 mm with I- AS probe attachment.
Crossflow Nebulizer (CF)
This nebulizer is used as standard for the HF resistant introduction system.
The CF consists of a Pt sample injector tube and a sapphire carrier gas orifice,
and it can be used for almost all reagents except aqua regia and H
2
O
2
. The
sample is introduced by the peristaltic pump or by self- aspiration. The typical
carrier gas pressure is about 300 to 400 kPa (43 to 58 psi) at a 1.2 L/min
carrier gas flow rate. The Ar gas supply pressure has to be set to 700 kPa (100
psi).
Behavior of the sample uptake rate is similar to those of the BN and the CN.
Special attention must be paid to the Pt sample injector tube when the sample
tubing is connected to it. Iridium is mixed with Pt to increase hardness, but it
is still very fragile.