Modelling and optimisation of a novel ICP source

Maxim Voronov, Volker Hoffmann

In the frames of SIMONA project

Atmospheric pressure Inductively Coupled Plasma (ICP) in Ar is a very wide-spread source of atomic emission and ions for spectral and mass-spectral elemental analysis [1], which provides highly stable analytical signals and extremely low detection limits. Relatively high power of the ICP of about 1 kW requires intensive cooling of the torch by argon. This results in relatively high consumption of argon in the ICP source.

Recently a new construction of an ICP source “Static High sensitivity ICP” (SHIP) was developed in the University of Münster (group of W. Buscher) [2]. In the SHIP Torch the cooling by argon is replaced by air cooling. This leads to a decrease of the Ar consumption in about 20 times. The SHIP construction differs from the usual (Fassel-type) ICP source significantly. Therefore the plasma properties are also changed.

The project “SImulation MOdel of a New plasma excitation sources for analytical application in Atomic spectrometry” (SIMONA) is a DFG funded collaboration between the University of Münster (group of W. Buscher) and IFW Dresden (group of V. Hoffmann). The project has the target to simulate plasma processes in the SHIP torch and, based on the simulation results, further development of the SHIP.

Fig. 1. Inductively coupled plasma in Fassel (left) and SHIP (right) torches.

  1. Ed. A. Montaser, “Inductively Coupled Plasma Mass Spectrometry”, Wiley-VCH, 1998.
  2. C. Engelhard, A. Scheffer, S. Nowak, T. Vielhaber, W. Buscher, “Trace element determination using static high-sensitivity inductively coupled plasma optical emission spectrometry (SHIP-OES)”, Analytica Chimica Acta, 2007, 583, 319–325.