The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 04, 2007
Filed:
Apr. 28, 2005
Aniela Leistner, Birkenstein, DE;
André Leistner, Birkenstein, DE;
Aniela Leistner, Birkenstein, DE;
André Leistner, Birkenstein, DE;
Polymerics GmbH, Berlin, DE;
Abstract
A sorbent comprising a spherical, highly porous polymer with specific hydrophobic-hydrophilic properties, specific pore volume and its distribution, as well as a method of solid phase extraction using said sorbent. The sorbent is produced by suspension polymerization of at least one hydrophilic monomer and at least one hydrophobic monomer, where the hydrophilic monomer comprises an imidazole moiety and the hydrophobic monomer is a mixture of isomeric divinylbenzene monomers and isomeric ethylvinylbenzene monomers. The sorbent has a pore diameter range from 5 Å to 1000 Å, an average pore diameter of 50 Å to 250 Å, and a pore volume from 1 ml/g to 2 ml/g comprising 15% to 25% micropores, 50% to 80% mesopores, and 5% to 30% macropores. Solid phase extraction columns and plates packed with the sorbent of this invention provide reliable high recoveries for a broad spectrum of analytes with various polarity, even if the sorbent is dried out multiple times during the extraction.