A horizontal graphite tube furnace for electrothermal vaporization of samples and introduction of the evolved material in the form of an aerosol into an ICP source is described. The most characteristic difference from the commercial (Perkin Elmer) system is that a glass cylinder is used around the graphite elements, and this enclosure makes possible the transportation of the evolved product exiting upward through the sample injection port. The effects of the following parameters have been investigated on the cadmium emission signal: furnace temperature, flow rate of the internal and the external furnace gases (argon), use of sample boat, and use of solution phase additive (sodium selenite) and gas phase additives (carbon tetrachloride and toluene vapor).
ASJC Scopus subject areas
- Analytical Chemistry