Heating chamber, heating furnace, analysis device, and method for analyzing foreign matter contents in samples

A heating chamber for a heating furnace, comprising:

• an electrically conductive wall;
• a sample reception area;
• a nozzle area;
• a first electrical connection area;
• and
• a second electrical connection area,
• wherein the sample reception area and the nozzle area are each surrounded by the wall,
• wherein the sample reception area and the nozzle are arranged one after the other along a central longitudinal axis and are configured in fluid communication with each other, and the sample reception area has a larger cross-sectional area than the nozzle area,
• wherein the first and second electrical connection areas are arranged adjacent to opposite ends of the heating chamber relative to the longitudinal axis of the heating chamber and are electrically connected to the wall, and
• wherein the heating chamber is configured in such a way that an electric current produced by applying an electric voltage to the first and second electrical connection areas flows through the wall in such a way that a heating capacity caused by it is one of equal and higher in the nozzle area compared to the sample reception area,
• wherein the wall has a narrowed cross-section geometry in a constricted section in which the wall surrounds the nozzle area compared to areas in which the wall surrounds the sample reception area, and
• wherein the heating chamber, in the constricted section, has web areas which bridge the constricted section in order to form a mechanically loadable linear connection between the opposite ends of the heating chamber.

A heating chamber for a heating furnace, comprising:

• an electrically conductive wall;
• a sample reception area;
• a nozzle area;
• a first electrical connection area;
• and
• a second electrical connection area,
• wherein the sample reception area and the nozzle area are each surrounded by the wall,
• wherein the sample reception area and the nozzle are arranged one after the other along a central longitudinal axis and are configured in fluid communication with each other, and the sample reception area has a larger cross-sectional area than the nozzle area,
• wherein the first and second electrical connection areas are arranged adjacent to opposite ends of the heating chamber relative to the longitudinal axis of the heating chamber and are electrically connected to the wall, and
• wherein the heating chamber is configured in such a way that an electric current produced by applying an electric voltage to the first and second electrical connection areas flows through the wall in such a way that a heating capacity caused by it is one of equal and higher in the nozzle area compared to the sample reception area,
• wherein the wall has a narrowed cross-section geometry in a constricted section in which the wall surrounds the nozzle area compared to areas in which the wall surrounds the sample reception area, and
• wherein the heating chamber has a plurality of web regions distributed equidistantly along a circumference of the constricted section.