Liquid purification or separation – With means to add treating material – Chromatography
Reexamination Certificate
2006-10-24
2006-10-24
Therkorn, Ernest G. (Department: 1723)
Liquid purification or separation
With means to add treating material
Chromatography
C210S502100, C210S635000, C210S656000, C502S401000
Reexamination Certificate
active
07125488
ABSTRACT:
Novel compositions are disclosed for use as a stationary phase in chromatography comprising an inorganic substrate that is modified with at least one silane having the formula R1δ-Qα-(CH2)βSiR2γX3-γ. In a preferred embodiment, the inorganic substrate is silica gel and is modified with at least two silanes. Methods of preparation and use in chromatographic applications are disclosed. The novel compositions provide superior chromatographic performance, reduced silanol activity, enhanced stability, and reproducibility in preparation and performance.
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Fishman Bella
Moore Cynthia
Therkorn Ernest G.
Varian Inc.
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