Multifunctional continuous online gas preparation and introduction device

Abstract

The invention provides a multifunctional continuous online gas preparation and introduction device which comprises a sample table unit, a rotating unit and a plurality of sample introduction units; the sample table unit comprises a sample disc, a water storage ring and a sample disc cover, a plurality of blind holes are formed in the upper part of the sample disc, the water storage ring is locatedin the sample disc, and the sample disc cover sleeves the outer side of the sample disc; the rotating unit is located above the sample disc and comprises an electric rotating table and an annular guide rail, the electric rotating table is fixed to the middle of the sample disc, the annular guide rail is installed above the electric rotating table, and at least one sliding block is arranged on theannular guide rail; each sample injection unit comprises a screw rod sliding table, a driving motor and a needle head, the screw rod sliding table is installed on the sliding block, the driving motoris connected with the guide rail sliding block, and the needle head is fixed to the outer side of the guide rail sliding block through a needle head clamping groove. The device has the beneficial effects that gas preparation and introduction are carried out in a rotating mode, multiple pretreatment operations can be carried out on multiple sample bottles at the same time, and thedevice is particularly suitable for experimental analysis needing a complex pretreatment sample injection mode.

Description

technical field [0001] The invention relates to the technical field of gas preparation and introduction devices, in particular to a multifunctional continuous online gas preparation and introduction device. Background technique [0002] Gas stable isotope mass spectrometer is a kind of instrument that can analyze isotopes of light elements such as hydrogen, oxygen, carbon, nitrogen and sulfur, and is widely used in geology, environment and quality supervision and other fields. At present, the gas stable isotope mass spectrometer can convert the analytes in different forms of samples into gases by connecting different pretreatment and sampling equipment externally, and import them into the host of the mass spectrometer for online testing. The specific external equipment mainly includes an elemental analyzer through combustion cracking, a liquid chromatograph for separating liquid-phase organic components, a gas chromatograph for separating gas-phase organic components, and Ga...

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Problems solved by technology

[0004] However, the current GasBench gas preparation and introduction method needs to be purged and tested successively, which seriously limits the analysis efficiency, and more complex analysis methods cannot achieve online continuous analysis on this equipment

Specifically, for example: 1) in the C and O isotopes of conventional carbonates, after the sample bottle is purged by the sample arm, it needs to be manually replaced with an acid needle and a sample needle for acid addition and testing. 2) Multi-component C and O isotope analysis of binary mixed carbonate rocks. The gas preparation and introduction process of this analysis experiment is very complicated, and it is necessary to carry out purging, acid addition and sample injection analysis under low temperature conditions first. , the second purge, and then raise the temperature for the second test under high temperature conditions. Traditional sampling equipment cannot perform complex pre-treatment operations such as online multiple purge and sample injection, and cannot quickly raise and lower the temperature. Each sample is subjected to strict time-controlled pre-treatment, which is time-consuming and labor-intensive and has large errors; 3) Analysis of H by water balance method 2 H and O isotopes in O, this method needs to replace the air in the sample bottle with CO 2 mixed gas or H 2 Mixed gas, after the catalysis reaches isotope balance, manually replace the injection needle, extract the gas and introduce it into the mass spectrometer to analyze its H and O isotopes. This method is also inefficient

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