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:
Aug. 11, 1992
Filed:
May. 10, 1990
Binyamin Feibush, State College, PA (US);
Supelco, Inc., Bellefonte, PA (US);
Abstract
Silica gel chromatographic supports surface-modified with (R.sup.1 O).sub.3-m Si R.sup.2.sub.m(CH.sub.2).sub.3 NH(CH.sub.2 CH.sub.2 NH).sub.n H, in which R.sup.1 is a C.sub.1 -C.sub.5 alkyl, R.sup.2 is methyl or ethyl, and m and n are independently selected from the integers 0, 1 or 2, and further modified chemically to produce reverse-phase character, markedly reduce the interaction between silanophilic analytes and the silanol groups present on the surface of the silica gel through the presence of polar groups, which include the residual unmodified amino and modified amino groups, and which are densely packed near the silica surface. This results in chromatographic elution of basic, silanophilic analytes in efficient, narrow bands similar to those of the less-polar analytes.