HEATING CHAMBER, HEATING FURNACE, ANALYSIS DEVICE, AND METHOD FOR ANALYZING FOREIGN-SUBSTANCE CONTENTS IN SAMPLES

摘要

The invention relates to a heating chamber (1) for a heating furnace, by means of which heating furnace an electrothermal vaporization of contaminants from samples can be accomplished such that said contaminants can be spectrometrically analyzed. The heating chamber has a wall (3), a sample-holding region (5), a nozzle region (7) and two electrical connection regions (9, 11). The heating chamber (1) is specially designed in such a way that an electric current flows through the wall (3) in such a way that heating power caused by said electric current is higher in the nozzle region (7) than in the sample-holding region (5). For example, the electrical connection regions (9, 11) can be arranged further from the longitudinal axis (8) in the radial direction than a part of the wall (3) surrounding the nozzle region (7), and, for example by means of a locally narrowed region (13), the heating chamber (1) can be designed in such a way that the current between the two electrical connection regions (9, 11) is conducted predominantly radially inward to the part of the wall (3) surrounding the nozzle region (7). An advantageous heat distribution in the heating chamber (1) that can be thereby achieved can have a positive effect on the analysis of sample contaminants.