发明名称 |
Method of sample introduction for supercritical fluid chromatography systems |
摘要 |
An improved method and apparatus for safely introducing sample into a flow stream of a supercritical fluid chromatography system is described. The sample injection method improves safety of injection by eliminating the risk of injecting sample into a high-pressure system containing liquids and gasses at or near supercritical ranges. The method improves the efficiency and significantly shortens the time of the injection process by using a check valve placed between a fill port on an injection valve and sample port where sample is injected by a syringe. After sample injection from a sample loop into a high-pressure flow stream, an injection valve is reset to receive a subsequent sample. High-pressure flow stream mixtures become trapped within the sample loop when the valve is reset. The check valve prevents the mixtures from expanding into the sample port and blowing out a syringe and flow stream mixtures from the fill lines. The trapped flow stream mixtures are directed to a waste port where they are safely contained. The technique can be applied equally as effective to preparatory SFC as well as to analytical SFC systems.
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申请公布号 |
US6428702(B1) |
申请公布日期 |
2002.08.06 |
申请号 |
US20010918435 |
申请日期 |
2001.08.01 |
申请人 |
BERGER INSTRUMENTS, INC. |
发明人 |
BERGER TERRY A.;FOGELMAN KIMBER D. |
分类号 |
B01D15/14;B01D15/40;G01N30/02;G01N30/16;(IPC1-7):B01D11/00 |
主分类号 |
B01D15/14 |
代理机构 |
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