Hardware manual

A-2 Agilent 7500 Series ICP-MS Hardware Manual
Appendix
Appendix A. Organic Solvent Kit
Organic Solvent Kit
General
When analyzing organic solvents, Oxygen must be added in to the carrier gas
line to burn the carbon in the organic solvent. This will avoid depositing the
carbon on to the interface (Sampling cone / Skimmer cone). If the deposition
is allowed to build up the interface cones can clog.
A 1.5mm (or 1mm) I.D torch is used for organic solvent samples to maintain
good plasma conditions. The drain volume when introducing the organic
solvent is smaller than when introducing aqueous solutions and most of the
organic solvent sample is introduced into the torch and it may extinguish the
plasma easily. So, it is necessary to use 1.5mm I.D torch to reduce the sample
loading on the plasma.
Figure 138
The Mass Flow controller in the 7500 will control the flow of the option gas
flow. An Argon / Oxygen mix must be used as option Gas.
Option Gas
Argon Gas