Method and apparatus for detecting strippable substances in liquids

US5324938A · kind A · utility

Assignee

• Fraunhofer-Gesellschaft zur förderung der angewandten Forschung e.V. · DE

Inventors

• Gunther Hambitzer · Remchingen, DE
• Wolfgang Lutter · Karlsruhe, DE
• Martin Joos · Karlsruhe, DE
• Ferdinand Hirth · Remchingen, DE

Key dates

• Filing date: Oct 8, 1992
• Grant date: Jun 28, 1994
• Expiry date: Oct 8, 2012

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N33/1893
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

For the continuous quantitative determination of volatile substances in lids, such as in particular halogenated hydrocarbons in process or waste waters, the invention proposes a corresponding method, according to which the liquid is led past a liquid-impermeable, but gas-permeable membrane and that the strippable substances in the liquid in their gas phase pass through the membrane and lead same through a measuring cell. An apparatus for performing the method is characterized by a flow chamber provided with a liquid-impermeable, but gas-permeable membrane for the liquids to be investigated and by a measuring cell for the substances to be investigated located on the membrane side remote from the flow chamber.