Porous thin film and process for analyte preconcentration and determination

US7955574B2 · kind B2 · utility

Assignee

• Battelle Memorial Institute · CH

Inventors

• Glen E. Fryxell · Kennewick, US
• Xiaohong Li · Richland, US
• Raymond S. Addleman · Richland, US
• Richard Wayne Skaggs · Raleigh, US

Key dates

• Filing date: Oct 1, 2008
• Grant date: Jun 7, 2011
• Expiry date: Jun 16, 2029

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/249953
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A porous thin film and a method are disclosed. The film has a generally uniform thickness and includes fused silica particles that provide multiple types of pores in the film. Particles are generally uniformly distributed on a surface and have a generally open structure that provides the film with an open interface readily accessible to fluids. The film provides for preconcentration of, e.g., heavy metals in fluid and gas samples that provides for direct determination of the analytes.