Method and apparatus for on-column detection in liquid chromatography
First Claim
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1. A method for high resolution on-column detection in high resolution liquid chromatography, comprising:
- providing a fused silica microcapillary column having an inner diameter less than 500 μ
m;
activating the interior of said column with a chromatographically active material;
applying a protective coating to the exterior of said column;
removing a segment of said protective coating to expose the underlying segment of said fused silica column;
providing an optical chromatographic detector;
positioning said exposed segment of said column in the optical path of said detector;
flowing a sample containing species to be identified through said column; and
detecting separated species as they flow through said exposed segment of said column.
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Abstract
On-column detection by an optical detector is accomplished with a flexible silica column. The flexible fused silica column has an inner diameter less than 500 μm, an external protective coating with a stripped portion near the end of the column. The stripped portion is placed in the working path of an optical detector in order to detect and resolve the sample.
50 Citations
10 Claims
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1. A method for high resolution on-column detection in high resolution liquid chromatography, comprising:
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providing a fused silica microcapillary column having an inner diameter less than 500 μ
m;activating the interior of said column with a chromatographically active material; applying a protective coating to the exterior of said column; removing a segment of said protective coating to expose the underlying segment of said fused silica column; providing an optical chromatographic detector; positioning said exposed segment of said column in the optical path of said detector; flowing a sample containing species to be identified through said column; and detecting separated species as they flow through said exposed segment of said column. - View Dependent Claims (2, 3, 4, 5)
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6. Apparatus for on-column detection in high resolution liquid chromatography comprising:
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a flexible fused silica column having an inner diameter less than 500 μ
m, said column being chromatographically activated and also having an external protective coating, said external coating having a segment exposed along the end of its length; andan optical chromatographic detector configured to receive said column so that said exposed segment lies in the optical detection path of said detector. - View Dependent Claims (7, 8, 9, 10)
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Specification