The determination of temperatures in a graphite tube atomizer with a conventional atomic absorption-flame emission spectrometer

Temperatures up to 3200°C in graphite tube atomizers can be measured by a two-wavelength intensity ratio method. The melting point of gold serves as a standard to calibrate the spectral response and the transmittance of the optics. The errors in the temperatures measured are 20–100° C. A conventional two-channel atomic absorption-flame emission spectrometer was used, but any single-channel instrument is also suitable for measurements. The method can be used for any type of heated graphite or metal flameless atomizer.