Recovery of liquids from absorbent packaging materials

Chemistry: analytical and immunological testing – Including sample preparation – Stabilizing or preserving

Reexamination Certificate

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Details

C436S177000, C436S178000, C210S634000

Reexamination Certificate

active

07008797

ABSTRACT:
The present invention describes a method for recovery of aqueous samples or components thereof from polymer packaging materials, wherein the spilled aqueous sample has been absorbed by the packaging material to form a liquid swollen absorbent gel. The method comprises the steps of contacting the liquid swollen absorbent gel with a recovery fluid, wherein the recovery fluid has a higher osmotic pressure than the aqueous sample.

REFERENCES:
patent: 5075221 (1991-12-01), Mauck et al.
patent: 5124041 (1992-06-01), Sheer et al.
patent: 5525475 (1996-06-01), Ladouceur
patent: 5770086 (1998-06-01), Indriksons et al.
patent: 5984087 (1999-11-01), Hacikyan
patent: 6161687 (2000-12-01), Hacikyan
patent: 6308827 (2001-10-01), Hacikyan
patent: 6523681 (2003-02-01), Hacikyan
Robert H. Perry et al., Perry's Chemical Engineering Handbook, 6thEd., 1984, pp. 3-97 to 3-100.

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