Autoclave for the pressure digestion of sample materials in analytical chemistry

US4944923A · kind A · utility

Assignees

• Wolfgang E. Schultz · DE
• Hans-Jurgen Brumsack · DE
• Norman Loftfield · DE

Inventors

• Hartmut Heinrichs · Göttingen, DE
• Hans-Jurgen Brumsack · Bocholt, DE
• Norman Loftfield · Witzenhausen, DE
• Nils Konig · Göttingen, DE

Key dates

• Filing date: Jun 17, 1987
• Grant date: Jul 31, 1990
• Expiry date: Jun 17, 2007

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01L3/04
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

An autoclave useful for pressure digestion of samples for chemical analysis, consisting of a closeable vessel containing the sample, which during operation sustains elevated temperatures and pressures. The autoclave has a PTFE (Teflon) beaker and lid, in direct contact with each other thus forming a tight seal with an excess-pressure release mechanism. The assembled vessel is held in a device that presses the sealing surfaces of the beaker and lid together, through pressure on a metallic lid support disc. The sealing surfaces of the beaker and lid are free-standing, which permits a direct release of excess-pressure and necessitates an extended clamping device for the lid support disc, which is fixed at a single point.