Sonic treatment to selectively reduce the void volume of sintere

Chemical apparatus and process disinfecting – deodorizing – preser – Analyzer – structured indicator – or manipulative laboratory... – Calorimeter

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422 56, 436169, 436 63, G01N 3348

Patent

active

060249196

ABSTRACT:
The present invention provides a method of sonic treatment to selectively reduce the void volume of a sintered polymer such as porous high density polyethylene (HDPE). The invention also provides a method and an article of manufacture for receiving a liquid sample, where a first portion of the sintered polymer (1a) overlies a solid surface (4a) and a second portion of the polymer (1b) overlies a window (4b). Sonic treatment of the sintered polymer reduces the void volume of the first portion (1a) compared to the second portion (1b). As a result, a liquid sample applied to the polymer will preferentially migrate through the second portion (1b), rather than through the first portion (1a). When the article of manufacture is used to analyze a liquid sample such as blood, less sample is required because of the preferential migration in the sonically treated sintered polymer.

REFERENCES:
patent: 4300910 (1981-11-01), Pannwitz
patent: 5470752 (1995-11-01), Burd et al.
patent: 5597532 (1997-01-01), Connolly
patent: 5639672 (1997-06-01), Burd et al.
patent: 5695949 (1997-12-01), Galen et al.

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