Automatic sample injector of gas isotope spectrometer

Abstract

An automatic sample injector of a gas isotope spectrometer comprises a control system, a gas path system, a positioning system and a bottom plate, wherein the control system includes a control panel and a single chip microcomputer, and the control panel is connected with the single chip microcomputer through a flat cable; the positioning system includes a sample disc, a gear disc, a motor, an aircylinder, an air cylinder arm, a middle shaft rod and a side shaft rod; and the gas path system includes a three-way needle inlet valve, a three-way needle withdrawing valve, an air pressure stabilizing valve, a two-way vacuum valve, a three-way gas inlet valve, a three-way selection valve, a vacuum pump, a gas sampling pump, a sample gas bag, a two-way inflation valve, an electronic gas pressurecontrol meter, a dilution buffer bag and a nitrogen pressure regulating valve. The injector can be combined with an isotope spectrometer to realize manufacturing and full-automatic sample injection analysis of a gas isotope sample.

Description

technical field [0001] The invention relates to the technical field of gas detection, in particular to an automatic sampler for a gas isotope spectrometer. Background technique [0002] Isotope tracer technology is to use the isotope of the element itself or to replace a certain element of the substance with the isotope to mark the compound. According to different purposes, the isotope can use radioactive isotopes or stable isotopes, and the difference in the radiation energy or mass of the isotope is the goal. Generally, since stable isotopes have no nuclear radiation, the properties of isotope atoms or molecules will not affect the physical and chemical properties of substances, and will not affect the physiological and biochemical processes of animals and plants. They are widely used in scientific research to study the mechanism of action and can study substances. source and destination. [0003] The traditional detection of stable isotopes is realized by isotope mass sp...

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Problems solved by technology

[0004] The gas isotope spectrometer requires a large amount of sample injection, and the sample is generally stored in a sample gas bag, but the sample gas bag is not suitable for large-scale automatic analysis due to its unstable shape and large volume, and the gas isotope spectrometer injection pressure The range is narrow, and directly using the headspace bottle to inject samples will cause the internal pressure to be too low as the injection progresses to meet the injection requirements

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