The present application relates to a device for extracting volatile components from a sample received in a sample vessel, wherein the sample vessel is closed in a gas-tight manner. The device moreover has a discharge line and a supply line, which protrude into the sample vessel. The supply line comp
The present application relates to a device for extracting volatile components from a sample received in a sample vessel, wherein the sample vessel is closed in a gas-tight manner. The device moreover has a discharge line and a supply line, which protrude into the sample vessel. The supply line comprises a first valve with which a flow of gas through the supply line can be throttled and/or interrupted. A suction opening of a pump is fluidically connected to the discharge line via a first fluid line, such that the pressure conditions in the device can be controlled by the capacity of the pump and by the setting of the first valve. A second fluid line fluidically connects the supply line to an output opening of the pump, such that sample vessel, supply line, discharge line and pump form a closed gas circuit. A trap element with at least one sorption material is fluidically connected to the first fluid line or the second fluid line.
대표청구항▼
1. A device for extracting volatile components from a sample, comprising: a) a sample vessel for receiving the sample, wherein the sample vessel is dosed in a gas-tight manner;b) a discharge line and a supply line, which protrude into the sample vessel, wherein the supply line has a first valve with
1. A device for extracting volatile components from a sample, comprising: a) a sample vessel for receiving the sample, wherein the sample vessel is dosed in a gas-tight manner;b) a discharge line and a supply line, which protrude into the sample vessel, wherein the supply line has a first valve with which a flow of gas through the supply line can he throttled and/or interrupted;c) a pump with a suction opening and an output opening;d) a first fluid line which fiuidically connects the discharge line to the suction opening of the pump; ande) a second fluid line which fluidically connects the supply line to the output opening of the pump such that the sample vessel, the supply line, the discharge line, the first fluid line, the second fluid line, and the pump form a dosed gas circuit, wherein a trap element with at least one sorption material is fluidically connected to the first fluid line or the second fluid line. 2. The device according to claim 1, wherein the trap element is connected releasably to the first fluid line or the second fluid line. 3. The device according to claim 1, wherein the first fluid line or the second fluid line comprises two subsidiary fluid lines, wherein the trap element is arranged between these two subsidiary fluid lines. 4. The device according to claim 1, wherein the supply line protrudes farther into the sample vessel than the discharge line, such that, when a liquid sample is received, the supply line protrudes into the liquid sample and the discharge line protrudes into a gas space above the liquid sample. 5. The device according to claim 1, wherein, in the direction of flow of the closed gas circuit, a water trap is arranged upstream from the trap element in the first fluid line or the second fluid line. 6. The device according to claim 1, wherein the trap element has at least one valve with which the trap element can be fluidically connected to an analysis apparatus. 7. The device according to claim 1, wherein the trap element has a heating and/or cooling element. 8. The device according to claim 1, wherein the supply line can be fluidically connected to a gas reservoir via a second valve. 9. The device according to claim 1, wherein the trap element is designed as a syringe, wherein a needle of the syringe is inserted into the second fluid line, and the at least one sorption material is arranged in the barrel of the syringe. 10. A method for extracting volatile components from a sample using a device according to claim 1, said method comprising the following steps: a) arranging the sample in the sample vessel with a supply line and a discharge line, wherein the sample vessel is then closed in a gas-tight manner;b) aspirating gas out of the sample vessel, or out of a gas space located above the sample in the sample vessel, into the discharge line by the pump connected fluidically to the discharge line via the first fluid line; andc) the gas is conveyed by the pump into the second fluid line, which is fluidically connected to the supply line, such that the gas circulates in the sense of a closed gas circuit between sample vessel and pump, wherein volatile components of the sample, which are outgassed from the sample, are held back by the absorption material of the trap element fluidically connected to the first fluid line or to the second fluid line. 11. The method according to claim 10, wherein a gas flow of the closed gas circuit is throttled or interrupted for a predetermined time by the first valve of the supply line, such that an underpressure arises in the sample vessel and an overpressure arises in the trap element. 12. A method according to claim 10 for extracting volatile components from a sample, wherein the trap element is designed as a syringe, wherein a needle of the syringe is inserted into the second fluid line, and the at least one sorption material is arranged in the barrel of the syringe; wherein the piston of the syringe is periodically driven to and fro in the barrel.
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이 특허에 인용된 특허 (6)
Thomas Waters ; Raymond Bushnell, Apparatus and method for extracting and analyzing gas.
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