Sample
Introduction
PlasmaQuant MS Series
24
4.2.2
Peristaltic Pump
A four channel peristaltic pump controls the sample flow to the nebulizer. This uptake
method minimizes variations in the natural uptake rate of the nebulizer as a result of
viscosity effects, the hydrostatic pressure head, and surface tension of samples.
A second channel on the peristaltic pump, pumps the drain of the spray chamber,
which improves the analytical precision of the instrument, preventing fluctuations of
pressure within the spray chamber.
The third peristaltic pump channel typically introduces internal standards or diluents.
NOTICE
The standard pump and drain tubing supplied with the instrument are suitable for
aqueous solutions only. Tubing is available for use with organic solvents, if required.
4.2.3
Spray chamber
The sample aerosol from the nebulizer passes into a Peltier cooled spray chamber. The
fine droplets continue on to the torch and larger droplets condense, falling to the
bottom of the spray chamber where they are pumped away by the drain.
Figure 4-3 - 8c. The Peltier cooled glass Scott spray chamber 10-5000-040-00 8d. Spray chamber
Endcap 10-5000-063-12 8e. Spray chamber Waste Tubing 10-5000-253-11
NOTE
This spray chamber is suitable for use with aqueous and organic solvents.