发明名称 |
METHOD AND DEVICE FOR VAPORIZATION INJECTION OF HIGH VOLUMES IN GAS CHROMATOGRAPHIC ANALYSIS |
摘要 |
This invention concerns a method and apparatus for vaporization injection of large volumes of liquid sample (substance to be analysed + solvent) introduced by means of the needle of a syringe onto a heated vaporization chamber which is part of an injector applied to a device for gas chromatographic analysis, the sample being sent in form of a liquid band travelling through said vaporization chamber at high speed until reaching stopping and vaporization means positioned adjacent to the inlet of a capillary to collect the vapours. In order to inject large volumes without modifying the vaporization chamber and without samples parts losses, in splitless mode, a drawing up of the sample vapours from the vaporization chamber into said capillary is made by means of a local action of volume contraction, caused by recondensation of at least the solvent vapours in this capillary, said capillary being in the form of a pre-column with no stationary phase, maintained at low temperature at least during the injection. |
申请公布号 |
WO03060508(A3) |
申请公布日期 |
2003.10.09 |
申请号 |
WO2002IB05506 |
申请日期 |
2002.12.19 |
申请人 |
THERMO FINNIGAN ITALIA S.P.A.;MAGNI, PAOLO;PORZANO, THOMAS |
发明人 |
MAGNI, PAOLO;PORZANO, THOMAS |
分类号 |
G01N30/02;G01N30/12;G01N30/16 |
主分类号 |
G01N30/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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