초록 ▼

A vaporization injector for gas chromatography analysis instruments, of the type including a vaporization chamber, heated or which may be heated, with a longitudinally elongated shape, a device for hermetically inserting the needle of a syringe containing the sample (substance to be analysed and sol

A vaporization injector for gas chromatography analysis instruments, of the type including a vaporization chamber, heated or which may be heated, with a longitudinally elongated shape, a device for hermetically inserting the needle of a syringe containing the sample (substance to be analysed and solvent) into the chamber, a connection for feeding a carrier gas into the chamber and a gas chromatography capillary column with an upstream end open inside the vaporization chamber. In order to allow the vaporization of large sample volumes, the upstream end of the gas-chromatography column and the injection point of the sample into the vaporization chamber are both arranged adjacent to one of the longitudinal ends of the vaporization chamber and the feed connection for the carrier gas is located adjacent to the other end.

대표청구항 ▼

1. A vaporization injector for gas chromatography analysis instruments, comprising a vaporization chamber, heated or which may be heated, with a longitudinally elongated shape having an upstream end and a bottom end, a device for hermetically inserting a needle of a syringe containing a sample into

1. A vaporization injector for gas chromatography analysis instruments, comprising a vaporization chamber, heated or which may be heated, with a longitudinally elongated shape having an upstream end and a bottom end, a device for hermetically inserting a needle of a syringe containing a sample into the chamber, a connection for feeding a carrier gas into the chamber and a gas chromatography capillary column with an upstream end open inside the vaporization chamber, wherein the upstream end of the gas-chromatography column is in the vicinity of the injection point of the sample into the vaporization chamber and both are positioned adjacent to one of the longitudinal ends of said vaporization chamber and the feed connection for the carrier gas is located in the vicinity of the other end of said vaporization chamber. 2. An injector as claimed in claim 1, characterized in that a limited section of the needle of the syringe penetrates inside the vaporization chamber, for a length from 0 to 15 mm. 3. An injector as claimed in claim 1, wherein the vaporization chamber is vertically elongated, the injection point of the sample is adjacent to the upstream end of the vaporization chamber; the gas-chromatography column crosses the vaporization chamber longitudinally, from the bottom end until its open end is adjacent to the upstream end of such chamber; and in that the carrier gas is introduced in the vicinity of the bottom end of the vaporization chamber. 4. An injector as claimed in claim 3, further comprising means for feeding the carrier gas in the vicinity of the bottom end of the vaporization chamber while the sample is being injected and means for feeding carrier gas in the vicinity of the upstream end of the vaporization chamber during analysis. 5. An injector as claimed in claim 1, wherein the vaporization chamber is vertically elongated, the injection point for injecting the sample is located in the vicinity of the open end of the gas chromatography column and both are positioned to the bottom end of the vaporization chamber; and the feed connection for the carrier gas is located in the vicinity of the upstream end of the vaporization chamber. 6. An injector as claimed in claim 1, wherein the sample is injected into the vaporization chamber in a direction which is not reciprocally aligned with the upstream end of the gas-chromatography column inside the vaporization chamber. 7. An injector as claimed in claim 6, wherein the direction for injecting the sample into the vaporization chamber and an axial direction of the gas chromatography column are parallel to one another and located at one end of the vaporization chamber. 8. An injector as claimed in one of the previous claims, wherein the sample is injected into the vaporization chamber through a channel, fed at its upstream end by the needle of the syringe. 9. An injector as claimed in claim 8, wherein the channel is hermetically coupled to a tip of the needle and a downstream end thereof has one or more bottlenecks for nebulizing the sample injected into the vaporization chamber. 10. An injector as claimed in claim 9, wherein the channel is obtained in a block of material suitable for transmitting heat, heated either independently or by the atmosphere of the vaporization chamber. 11. An injector as claimed in claim 8, wherein the vaporization chamber is arranged essentially horizontal and the channel for introducing the sample is curved, to connect an essentially vertical inlet to an essentially horizontal outlet.