Sample carrier for flameless atomic-absorption and emission spectroscopy

摘要

The sample carrier consists of expanded graphite cold-rolled or cold-pressed at high pressure. It is preferably made by deep-drawing from commercially available graphite foil. The sample carrier may be coated with pyrolytic graphite after forming to seal the surface and provide additional mechanical strength. In order to avoid damage to the foil during the deep-drawing process the graphite foil may be prior coated with a stabilising film comprising a soluble deformable polymer material. This material is preferably volatile at the preheating temperatures applied to the sample holder prior to the coating with pyrolytic graphite as this eliminates the necessity for a separate step to remove the film. IMAGE