Patent ID: 7407568
Filing Date: 2008-08-05
Classification: B01J,C23C

Abstract:
1. A method of using of a sol solution coated capillary having an inner surface, comprising the steps of: filling a fused silica capillary with sol solution, wherein the sol solution comprises sol-gel precursor, wherein the sol-gel precursor is N-Octadecyl-dimethl[3-(trimethoxysilyl)propyl] ammonium chloride; allowing the sol solution in the capillary to form a stationary phase, wherein a first portion of the stationary phase forms a thin layer, chemically bonded to the inner surface of the capillary, and a second portion of the stationary phase forms a residual solution; expelling the residual solution leaving a coated column; and using the coated column for extraction and preconcentration of chemical samples.