Modified collection plates for a cascade impactor

US11137324B1 · kind B1 · utility

Assignee

• The United States of America as represented by the Secretary of the Army · US

Inventors

• Jana S Kesavan · Catonsville, US
• Jerold R. Bottiger · Aberdeen, US

Key dates

• Filing date: Apr 9, 2020
• Grant date: Oct 5, 2021
• Expiry date: Apr 24, 2040

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N2015/0261
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A collection plate for a cascade impactor is provided that includes: a container; an absorbent layer including a bottom surface and a top surface, the absorbent layer residing within the container, the absorbent layer further including a liquid medium within the absorbent layer; and an impaction membrane placed on the top surface of the absorbent layer, such that the impaction membrane is in fluidic communication with the absorbent layer. The absorbent layer is configured to hydrate the impaction membrane for at least four hours in a temperature of about 78° F. at 37% RH. The collection plate may be utilized as a component in a cascade impactor and/or in a method of collecting a biological sample with a cascade impactor.