Apparatus and method for element analysis of materials by means of optical emission spectroscopy

A method for element analysis of materials by laser-induced plasma spectroscopy, comprising:

• exciting a plasma from a partial quantity of a test sample made of a material to be analyzed;
• conducting at least a portion of an optical radiation emitted from the plasma to a means provided for detection and spectral evaluation of the optical radiation;
• performing detection and spectral evaluation of the conducted optical radiation;
• supplying an inert gas by means of a capillary tube;
• and
• conducting the at least a portion of the optical radiation by means of the capillary tube wherein the capillary tube is arranged such that optical radiation emitted from the plasma is detected at a flat angle of 1° to 20°.

An apparatus for element analysis of materials by laser-induced plasma spectroscopy, comprising:

• a means for exciting a plasma from a partial quantity of a test sample made of a material to be analyzed;
• at least one spectrometer for detection and spectral evaluation of an optical radiation from the plasma;
• at least one capillary tube configured to guide at least part of the optical radiation from the plasma to the at least one spectrometer;
• and
• a means for purging at least a portion of the apparatus with an inert gas;
• wherein the at least one capillary tube is configured to guide the inert gas and is disposed so that optical radiation is detected which emanates from the plasma at a low angle between 1° to 20°.