Volatile organic compound enrichment and rapid analysis device

Abstract

The utility model relates to the technical field of food flavor enrichment and analysis, and discloses a volatile organic compound enrichment and rapid analysis device which comprises a bottom plate, a heating table is fixedly installed on the upper surface of the bottom plate, a row of placing grooves are formed in the heating table, and the placing grooves are communicated with the bottom plate. A placement groove is formed in the bottom plate, a treatment bottle is placed in the placement groove, a sealing cover is arranged at a bottle opening of the treatment bottle, two gas pipes are fixedly inserted into the surface of the sealing cover, a nitrogen generator is fixedly placed on the upper surface of the bottom plate, one gas pipe communicates with the gas outlet end of the nitrogen generator, and the other gas pipe communicates with the gas outlet end of the nitrogen generator. An enrichment liner pipe is inserted into one gas pipe in a sealed manner, an enrichment liner pipe is inserted into the other gas pipe in a sealed manner, two mounting seats are fixedly connected to the upper surface of the bottom plate, a heating cylinder is fixedly mounted at the top ends of the two mounting seats, and a heating pipe is arranged in the heating cylinder. And rapid identification of trace volatile flavor components in food can be realized.

Description

Technical Field

[0001] The utility model relates to the technical field of food flavor enrichment analysis, in particular to a volatile organic matter enrichment and rapid analysis device. Background Art

[0002] Flavor is one of the important characteristics of food and also a key factor in distinguishing different foods. Through qualitative and quantitative analysis of food flavor substances, the flavor characteristics of food can be scientifically evaluated and described, thus providing an important basis for food research, production and quality management. Volatile organic compounds (VOCs) play a key role in food flavor. They have low concentrations and relatively complex compositions, and are usually difficult to extract, separate and quantify. Therefore, pretreatment methods and instrumental analysis methods are of great significance for the detection of VOCs.

[0003] However, in the existing technologies, the existing SPME technology has the disadvantages of poor thermal stability of the coating, limited operating temperature, limited number of commercialized coatings, short quiet period of physical use of the coating, etc. In instrument analysis, the existing GC and GC-MS technologies have the disadvantages of complex pretreatment process, destructiveness, slow detection speed, etc., and the electronic nose technology has the disadvantages of low sensitivity and poor stability. Utility Model Content

[0004] In view of the shortcomings of the prior art, the utility model provides a volatile organic compound enrichment and rapid analysis device, which solves the shortcomings of the existing SPME technology in pre-treatment, such as poor thermal stability of the coating, limited operating temperature, limited number of commercialized coatings, and short quiet period of physical use of the coating. In instrument analysis, the existing GC and GC-MS technologies have the problems of complex pre-treatment process, destructiveness, slow detection speed, etc., and the electronic nose technology has the problems of low sensitivity and poor stability.

[0005] The utility model provides the following technical solution: a volatile organic compound enrichment and rapid analysis device, comprising a bottom plate, a heating platform is fixedly installed on the upper surface of the bottom plate, a row of placement slots are arranged on the heating platform, treatment bottles are placed inside the placement slots, a sealing cover is arranged at the bottle mouth of the treatment bottle, two air pipes are fixedly plugged on the surface of the sealing cover, a nitrogen generator is fixedly placed on the upper surface of the bottom plate, one of the air pipes is connected to the gas outlet end of the nitrogen generator, an enrichment liner is sealed and plugged on the other air pipe, and the bottom plate Two mounting seats are fixedly connected to the upper surface, and heating cylinders are fixedly installed on the top ends of the two mounting seats. A heating tube is arranged inside the heating cylinder, and an electric heating wire is wound around the surface array of the heating tube. An air inlet pipe is connected between one end of the heating tube inside the heating cylinder and the nitrogen generator, and a sealing block is fixedly connected to the other end of the heating cylinder, and the sealing block is connected to the heating tube. A mass spectrometer equipped with a SICRIT power supply is placed on the upper surface of the base plate, and a sealing joint is arranged at the air inlet end of the mass spectrometer equipped with a SICRIT power supply.

[0006] Preferred technical solution 1: The length of the enrichment liner is five centimeters, one end of the enrichment liner is set to an outward-expanded cone, the two ends of the enrichment liner are matched with a sealing block and a sealing joint respectively, and the interior of the enrichment liner is filled with glass wool.

[0007] This scheme can facilitate the enrichment of volatile organic compounds in samples.

[0008] Preferred technical solution 2: The heating platform can be temperature controlled in a temperature control range from room temperature to 100°C.

[0009] This solution can conveniently heat the sample to allow the volatile organic matter in the sample to evaporate quickly.

[0010] Preferred technical solution three: the electric heating wire can be temperature controlled from room temperature to 500° C., and the heating tube is a ceramic tube.

[0011] This solution can conveniently and quickly thermally desorb volatile organic compounds.

[0012] Preferred technical solution four: the air pipe and the air inlet pipe are both Pickup tubes, and the interior of the nitrogen generator is nitrogen.

[0013] This solution can facilitate the transportation of nitrogen.

[0014] Compared with the prior art, the utility model provides a volatile organic compound enrichment and rapid analysis device, which has the following beneficial effects: more volatile organic compounds in the sample stored in the processing bottle can be stimulated by the heating table and the air pipe, and the volatile organic compounds are adsorbed and enriched by the enrichment liner to increase the concentration of the volatile organic compounds and achieve the enrichment of low-concentration odor compounds, and then the enrichment liner is removed from the air pipe, and then the enrichment liner is installed between the heating cylinder and the mass spectrometer equipped with a SICRIT power supply through a sealing block and a sealing joint, and the volatile organic compounds are rapidly thermally desorbed by the heating cylinder, and then, by building a flow-through medium passage discharge power supply (SI SICRIT)-mass spectrometry olfactory device can make compounds produce molecular ions at room temperature and pressure, and then inhale them with negative pressure of mass spectrometry or tandem mass spectrometry to achieve instantaneous detection, improve the separation ability and detection sensitivity of the mass spectrometer equipped with SICRIT power supply, and meet the analysis requirements of odor components in samples. When in use, the device can enrich low-concentration volatile organic components to increase the analysis concentration of flavor components. After the enrichment is completed, it can be directly thermally desorbed, which is simple, fast and reproducible. It can meet the analysis requirements of volatile organic compound components. At the same time, it does not require chromatographic separation, can achieve real-time detection, does not require exogenous gas and solvents, and is more environmentally friendly than existing technologies. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model;

[0016] Figure 2 This is a cross-sectional view of the internal structure of the enrichment liner of the utility model;

[0017] Figure 3 This is a cross-sectional view of the internal structure of the heating tube of the present utility model.

[0018] In the figure: 1, bottom plate; 2, heating table; 3, placement tank; 4, treatment bottle; 5, sealing cover; 6, gas pipe; 7, nitrogen generator; 8, enrichment liner; 9, mounting base; 10, heating cylinder; 11, heating tube; 12, electric heating wire; 13, air inlet pipe; 14, sealing block; 15, mass spectrometer equipped with SICRIT power supply; 16, sealing joint; 17, glass wool. DETAILED DESCRIPTION

[0019] See also Figure 1-3 ,

[0020] Embodiment 1: A volatile organic compound enrichment and rapid analysis device, comprising a bottom plate 1, a heating platform 2 is fixedly installed on the upper surface of the bottom plate 1, a row of placement slots 3 are provided on the heating platform 2, a processing bottle 4 is placed inside the placement slots 3, a sealing cover 5 is provided at the bottle mouth of the processing bottle 4, two air pipes 6 are fixedly plugged on the surface of the sealing cover 5, a nitrogen generator 7 is fixedly placed on the upper surface of the bottom plate 1, one of the air pipes 6 is connected to the gas outlet end of the nitrogen generator 7, and an enrichment liner 8 is sealed and plugged on the other air pipe 6, and two installations are fixedly connected on the upper surface of the bottom plate 1 Seat 9, a heating cylinder 10 is fixedly installed on the top of the two mounting seats 9, a heating tube 11 is arranged inside the heating cylinder 10, an electric heating wire 12 is wound around the surface array of the heating tube 11, an air inlet pipe 13 is connected between one end of the heating tube 11 inside the heating cylinder 10 and the nitrogen generator 7, a sealing block 14 is fixedly connected to the other end of the heating cylinder 10, the sealing block 14 is connected to the heating tube 11, a mass spectrometer 15 equipped with a SICRIT power supply is placed on the upper surface of the bottom plate 1, and a sealing joint 16 is provided at the air inlet end of the mass spectrometer 15 equipped with a SICRIT power supply.

[0021] Embodiment 2: The difference between this embodiment and embodiment 1 is that the length of the enrichment liner 8 is five centimeters, one end of the enrichment liner 8 is set to an outward-expanded cone, the two ends of the enrichment liner 8 are matched with the sealing block 14 and the sealing joint 16 respectively, and the interior of the enrichment liner 8 is filled with glass wool 17, which is convenient for enriching volatile organic matter in the sample.

[0022] Embodiment 3: The difference between this embodiment and embodiment 1 is that the heating stage 2 can be temperature controlled within a temperature range from room temperature to 100° C., which facilitates heating of the sample and allows the volatile organic compounds in the sample to evaporate rapidly.

[0023] Embodiment 4: The difference between this embodiment and embodiment 1 is that the electric heating wire 12 can be temperature controlled from room temperature to 500° C., and the heating tube 11 is a ceramic tube, which is convenient for rapid thermal desorption of volatile organic compounds.

[0024] Embodiment 5: The difference between this embodiment and embodiment 1 is that, the air pipe 6 and the air inlet pipe 13 are both Pickup tubes, and the interior of the nitrogen generator 7 is nitrogen, which facilitates the transportation of nitrogen.

[0025] In summary, the volatile organic compound enrichment and rapid analysis device can stimulate more volatile organic compounds in the sample stored in the processing bottle 4 through the heating table 2 and the air pipe 6, and adsorb and enrich the volatile organic compounds through the enrichment liner 8 to increase the concentration of the volatile organic compounds and achieve the enrichment of low-concentration odor compounds. Then, the enrichment liner 8 is removed from the air pipe 6, and then the enrichment liner 8 is installed between the heating cylinder 10 and the mass spectrometer 15 equipped with a SICRIT power supply through the sealing block 14 and the sealing joint 16. The volatile organic compounds are rapidly thermally desorbed by the heating cylinder 10, and then, by building a flow-through medium passage discharge power supply (SICRI T)-mass spectrometry olfactory device, can make compounds produce molecular ions at room temperature and pressure, and then inhale them with negative pressure of mass spectrometry or tandem mass spectrometry to achieve instantaneous detection, improve the separation ability and detection sensitivity of mass spectrometer 15 equipped with SICRIT power supply, and meet the analysis requirements of odor components in samples. When used, the device can enrich low-concentration volatile organic components to increase the analysis concentration of flavor components. After the enrichment is completed, it can be directly thermally desorbed, which is simple, fast and reproducible, and can meet the analysis requirements of volatile organic compound components. At the same time, no chromatographic separation is required, real-time detection can be achieved, and no exogenous gas and solvent are required, which is more environmentally friendly than existing technologies.

Claims

1. A volatile organic compound enrichment and rapid analysis device, comprising a bottom plate (1), characterized in that: A heating platform (2) is fixedly mounted on the upper surface of the bottom plate (1), a row of placement grooves (3) are provided on the heating platform (2), a processing bottle (4) is placed inside the placement grooves (3), a sealing cover (5) is provided at the bottle mouth of the processing bottle (4), two air pipes (6) are fixedly plugged into the surface of the sealing cover (5), a nitrogen generator (7) is fixedly mounted on the upper surface of the bottom plate (1), one of the air pipes (6) is connected to the gas outlet end of the nitrogen generator (7), and an enrichment liner (8) is sealed and plugged into the other air pipe (6), and two mounting seats (9) are fixedly connected to the upper surface of the bottom plate (1), and the tops of the two mounting seats (9) are A heating cylinder (10) is fixedly installed at the end, a heating tube (11) is arranged inside the heating cylinder (10), and an electric heating wire (12) is wound around the surface of the heating tube (11). An air inlet pipe (13) is connected between one end of the heating tube (11) inside the heating cylinder (10) and the nitrogen generator (7), and a sealing block (14) is fixedly connected to the other end of the heating cylinder (10), and the sealing block (14) is connected to the heating tube (11). A mass spectrometer (15) equipped with a SICRIT power supply is placed on the upper surface of the bottom plate (1), and a sealing joint (16) is arranged at the air inlet end of the mass spectrometer (15) equipped with a SICRIT power supply.

2. The volatile organic compound enrichment and rapid analysis device according to claim 1, characterized in that: The length of the enrichment liner (8) is five centimeters. One end of the enrichment liner (8) is configured to be an outwardly expanded cone. The two ends of the enrichment liner (8) are respectively matched with a sealing block (14) and a sealing joint (16). The interior of the enrichment liner (8) is filled with glass wool (17).

3. The volatile organic compound enrichment and rapid analysis device according to claim 1, characterized in that: The heating platform (2) can be temperature controlled within a range from room temperature to 100°C.

4. The volatile organic compound enrichment and rapid analysis device according to claim 1, characterized in that: The electric heating wire (12) can be temperature-controlled, and the controlled temperature is from room temperature to 500° C. The heating tube (11) is a ceramic tube.

5. The volatile organic compound enrichment and rapid analysis device according to claim 1, characterized in that: The air pipe (6) and the air inlet pipe (13) are both Pickup tubes, and the interior of the nitrogen generator (7) is filled with nitrogen.

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