These samples would normally present problems due to the dissolved solids and the presence of HF. The use of the argon humidifier, sheath gas and the large ID injector tube from HORIBA Scientific ensures smooth running of these samples. For HF samples the use of the inert tangential nebulizer and the inert Scott spray chamber is required. The results show excellent detection limits for the original sample. A typical dilution factor would have degraded these figures by a factor of 10 when calculated in the original material.