Method and device for vaporization injection
AssigneeThermo Finnigan Italia S.p.A.
InventorsKonrad Grob, Fausto Munari, Paolo Magni
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Abstract
The invention concerns a device for vaporizing injections of samples into a gas chromatography analysis device, comprising a vaporization chamber elongated lengthways and heated, as well as a syringe equipped with a needle, the device being of the type in which the introduction of the sample is carried out without prior vaporization of the sample within the needle, and also foresees at least one stop and vaporization means for the liquid inside the vaporization chamber. To improve the conditions of vaporization and the transfer of the sample, the distance between the free end of the needle and the stated stop and vaporization means for the liquid is greater than 55 mm (FIG. 1).
Claims24
A device for vaporization injection of samples into a gas chromatography analysis instrument, comprising an elongated vaporization chamber having a lower portion that is constantly heated and having an upper portion, a syringe equipped with a needle that is arranged to inject a sample liquid through a tip of the needle to be released in a form of a liquid band into the upper portion where the released infected sample is maintained in the form of the liquid band, the device being configured to render vaporization of the sample liquid within the needle negligible, and further containing means for stopping and vaporizing the released sample liquid within the lower portion of the vaporization camber and above a column entrance, characterized in that a distance between the tip of the needle and the means for stopping and vaporizing the sample liquid above the column entrance is greater than 55 mm.
A vaporization method for a sample injected into a constantly heated vaporization chamber of a gas chromatography analysis instrument, characterized in that said sample is injected through a tip of a needle of a syringe into an upper portion of said vaporization chamber and is released from the tip of the needle in a form of a liquid band crossing said vaporization chamber from the upper portion where the released sample is maintained in the form of the liquid band, to a lower portion of the vaporization chamber, and that said released sample is stopped by liquid stop means that is positioned above a column entrance and said released sample is vaporized in the lower portion of the heated chamber, a distance between the tip of the needle and the liquid stop means being greater than 55 mm.
A device for vaporization injection of a sample into a gas chromatography analysis instrument, comprising an elongated vaporization chamber, a syringe equipped with a needle to inject a liquid sample, a stop and vaporization means for arresting the injected liquid sample and for vaporizing same within the elongated vaporization chamber, means for heating at least part of the elongated vaporization chamber to a temperature above a vaporization temperature of the sample while a further part of the elongated vaporization chamber is maintains the injected liquid in a form of a liquid, a distance between a tip of the needle and the stop and vaporization means being greater than 55 mm.
A vaporization method for a sample injected within a vaporization chamber of a gas chromatography analysis instrument, comprising heating at least a lower portion of the vaporization chamber to a temperature above a vaporization temperature of a sample to be analyzed, injecting through a tip of a needle of syringe the sample in correspondence with or in proximity of an upper portion of the vaporization chamber, releasing the sample from the tip of the needle in form of a liquid band crossing the vaporization chamber from the upper portion where the released sample is maintained in the form of the liquid band to the lower portion, stopping the released sample by liquid stop means that is positioned above a column entrance;
- and vaporizing the released sample in the lower portion of the vaporization chamber, a distance between the tip of the needle and the liquid stop means being greater than 55 mm.
Dependencies are inferred from the claim text.