| 摘要 |
PURPOSE:To provide a silica column which is durable for external scratches and moisture and capable of being formed in desired shape for a chromatograph by coating predetermined material on the inner wall of a thin hollow silica tube having flexibility and coating reinforcing and moisture-proof films on the outer wall of the tube. CONSTITUTION:The inner wall of a thin hollow silica tube T having flexibility is coated with organic silicon hydride agent or polyethylene oxide or the like as material D and inactivated. In order to further protect the outer wall of the tube T against external scratches, the outer wall of the tube T is coated with a coating agent P of the material such as polyimide, silicone rubber or the like or metal M such as aluminum, nickel or the like, and in order to protect the outer wall against moisture, it is coated with a silicon nitrile layer SN. The silica column thus formed may be formed in any shape such as coil state or the like. Since the silica becomes preferable carrier for solid phase SP, it effects preferable performance in a gas chromatograph to enable detection of the component which cannot be sufficiently detected by a glass column.
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