Longitudinally or transversely heated tubular atomizing furnace

US5949538A · kind A · utility

Assignee

• SGL Carbon AG · DE

Inventors

• Klaus Eichardt · Jena, DE
• Bernd Thiele · Odenthal, DE

Key dates

• Filing date: Mar 11, 1998
• Grant date: Sep 7, 1999
• Expiry date: Mar 11, 2018

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N21/74
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A transversely or longitudinally heated atomizing furnace for flameless atomic absorption spectrometry. The atomizing furnace has a tube furnace segment and a specimen support disposed in the tube furnace segment. The specimen support is rigidly fixed in the tube furnace. For that purpose, the specimen support has on its underside a central peg or foot which is fixed in a complementary depression or recess formed centrally in the inner wall of the tube furnace, approximately opposite the sample insertion opening. The specimen support and the tube furnace segment are formed from electrographite. The gas-accessible surfaces of the specimen support and the tube furnace segment are coated with pyrocarbon. The two members are non-detachably connected to each other by means of the pyrocarbon coating. The specimen support extends over as large as possible a portion of the length of the tube furnace. On its upper side, the specimen support is formed with a trough that can receive up to 50 .mu.l of solution to be analyzed. The solid mass of the specimen support is structurally minimized.