Absorbance cell for microfluid devices

US6224830A · kind A · utility

Assignee

• The Governors of the University of Alberta · CA

Inventors

• D. Jed Harrison · Edmonton, CA
• Graham McKinnon · Edmonton, CA
• Nghia Chiem · Edmonton, CA
• Gregor Ocvirk · Nierstein, DE
• Hossein Salimi-Moosavi · Sunnyvale, US
• Yutao Jiang · Edmonton, CA

Key dates

• Filing date: Jan 30, 1998
• Grant date: May 1, 2001
• Expiry date: Jan 30, 2018

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N2021/0346
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

An improved absorbance or detection cell for a microfluid device, and in accordance with an aspect of the invention, the absorbance cell comprises a bottom plate having a channel bearing surface in which a channel having a fluid inlet and fluid outlet is defined, a top plate having a channel facing surface bound to the channel bearing surface of the bottom plate and first and second reflecting elements formed on opposed sides of the channel to form a waveguide through which the channel extends such that radiation propagating along the waveguide makes multiple passes across the channel, the waveguide having a radiation input end and a radiation output end.