Graphite tube spectroscopy sample cell including illumination and observation structure

Abstract

Abstract A KNOWN GRAPHITE TUBE CELL APPARATUS USED FOR HEATING AN ATOMIC ABSORPTIUON SAMPLE INCLUDES AN OUTER HOUSING WITHIN WHICH THE HEATED GRAPHITE TUBE IS COMPLETELY ENCLOSED (EXCEPT FOR THE OPEN ENDS OF THE TUBE), BOTH TO MAINTAIN THE NON-OXIDIZING PROTECTIVE GAS ON THE SURFACES OF THE GRAPHITE TUBE TO AVOID ITS BEING OXIDIZED AT THE HIGH TEMPERATURES USED TO DISSOCIATE THE SAMPLE, AND TO CONTAIN THE RADIATION FROM THE RED-HOT GRAPHITE TUBE WHEN SO HEATED. BECAUSE OF THE CLOSED AND OPAQUE NATURE OF THE HOUSING, IT IS DIFFICULT TO INTRODUCE THE SAMPLE INTO A SMALL INLET OPENING IN THE GRAPHITE TUBE. A HOLLOW ATTACHMENT ON AND EXTENDING THROUGH THE OUTER HOUSING IS PROVIDED, IN WHICH A LIGHT SOURCE IS CONTAINED FOR ILLUMINATING THE SAMPLE INLET OPENING. THE END OF THE ATTACHMENT REMOTE FROM THE CELL IS SEALED, AND THE INLET FOR THE PROTECTIVE GAS EXTENDS THROUGH THE WALL OF THE ATTACHMENT AT A POSITION BETWEEN THE LIGHT SOURCE AND THE OUTER END NEAR THE CELL SO AS ALSO TO COOL THE LAMP WHEN THE CELL IS HEATED. A VISUAL OBSERVING DEVICE IS PREFERABLY PROVIDED ON AND EXTENDING THROUGH THE HOUSING, THE AXIS OF WHICH ALSO INTERSECTS THE SAMPLE INLET, SO THAT THE USER MAY CONVENIENTLY SEE THIS INLET WHEN INTRODUCING THE SAMPLE.

Inventors

• 👤 Elmar Wiedeking

Bibliographic Details