Center Tube Options; Centre Tube Holder - Thermo Scientific iCAP 7000 Series Manual

iCAP Customer Familiarisation Manual

5.2 Center Tube Options

5.2.1 1mm with 2 RED bands centre tube
Used for organic solvents. Used for both radial and duo instruments.
This is to reduce the amount of sample reaching the plasma as larger center tubes result in too
much sample reaches the plasma and the plasma may go out.
5.2.2 1.5mm RED band centre tube
Best compromise for a radial instrument,
5.2.3 2mm Blue band centre tube
Best Compromise for a duo instrument.
5.2.4 2mm Ceramic centre tube
Used for specific sample types (for example hydrofluoric acid digests)

5.3 Centre tube holder

Check the 4 o-rings in the Center tube holder are not damaged. Insure the centre tube is inserted
fully into the plastic centre tube holder.
Note: the tip of the centre tube holder will discolor with use. This discoloration is normal and will
not affect the performance of the torch holder assembly. ▲
This document is part numbered 849940090071 Version 1.02
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