Silicone rubber multi-tube open enrichment device for organic substances in water

Abstract

The utility model relates to water environment organic matter detection technical field, in view of the existing concentrator thermal analysis when silicon rubber pipe is easy to fold, the problem of low analysis efficiency, provide a kind of silicon rubber multi-tube opening type concentrator of water organic matter. The concentrator includes multi-tube needle, corresponding number's silicon rubber pipe and thermal analysis container;Thermal analysis container cover is equipped with convex structure, and the end of multi-tube needle is matched with convex through plug, realizes inverted hanging type installation. Silicon rubber pipe is soaked first and is enriched with organic matter, then is inverted and hung in thermal analysis container, and by heating analysis, organic matter enters ion mobility spectrum detection with carrier gas. Inverted hanging type design makes silicon rubber pipe completely unfold, improves analysis efficiency and enrichment flux, completes enrichment detection within 30 minutes, is applicable to the water, gas sample analysis of field and laboratory.

Description

Technical Field

[0001] This utility model relates to the field of environmental analysis and testing technology, and more specifically, to a silicone rubber multi-tube open-type enrichment device for organic matter in water. Background Technology

[0002] Extracting and analyzing organic matter from water samples is a key step in water quality monitoring and pollution control, and an important technical means to achieve sustainable use of water resources.

[0003] The existing technology has the following limitations: During thermal desorption, the silicone rubber tube of the traditional enrichment device is prone to folding or sticking to the wall due to gravity, which means that the desorbed organic matter cannot be completely transported with the carrier gas, resulting in a high residual rate; the silicone rubber tube does not have sufficient contact with the carrier gas, and there is a dead volume in the transport path of the enriched matter, resulting in a weak detection signal and slow response; the connection between the thermal desorption container and the enrichment device is mostly horizontal, which has poor stability and is prone to pipe detachment or leakage due to vibration.

[0004] Existing patent document with application number 201721036396.0 discloses a micro solid-phase extraction device. This technology uses a hydrophilic PES membrane instead of the traditional μSPE PP membrane, which can greatly enhance the wettability of the membrane bag. It uses a vortex method instead of magnetic stirring to improve reproducibility and reduce the memory effect that may be caused by magnetic stir bar. However, the double-layer extraction membrane bag and the structure of the bag containing extraction packing material are inconvenient to operate, have poor sealing, and are not conducive to the rapid extraction of organic matter from water samples. Utility Model Content

[0005] To address the aforementioned technical problems, a silicone rubber multi-tube open-type enrichment device for organic matter in water is provided. Through a multi-tube array combined with an inverted thermal desorption connection design, it solves the problems of low desorption efficiency and insufficient throughput of traditional enrichment devices. It can rapidly enrich and extract organic matter from water samples, and is suitable for the rapid enrichment and detection of organic matter in surface water, groundwater, industrial wastewater, and air samples. Combined with a thermal desorption container and subsequent equipment such as ion mobility spectrometry and gas chromatography, it enables qualitative and quantitative analysis, and is particularly suitable for rapid on-site screening.

[0006] The technical means adopted in this utility model are as follows:

[0007] A silicone rubber multi-tube open-type enrichment device for organic matter in water includes a multi-tube needle, a silicone rubber tube, and a plug. The multi-tube needle has at least two needles, and the number of silicone rubber tubes corresponds to the number of needles. One end of each silicone rubber tube is sleeved on the outside of the needle tip of the multi-tube needle, and a plug is installed below the multi-tube needle.

[0008] An enrichment device for enriching organic matter is placed in a thermal desorption container for testing. The inner side of the upper cover of the thermal desorption container is provided with a protruding structure, and the end of the multi-tube needle is connected to the protruding structure through a plug to achieve an inverted installation.

[0009] Furthermore, the number of needles in the multi-tube needle is 2 to 31, and the number of silicone rubber tubes is 2 to 31.

[0010] Furthermore, the needles of the multi-tube needle are arranged in a ring or linear array.

[0011] Furthermore, the outer diameter of the multi-tube needle is 0.25~4mm, the inner diameter of the tube is 0.1~3.5mm, and the length of the multi-tube needle is 1~5cm.

[0012] Furthermore, the silicone rubber tube has an inner diameter of 0.2~3.5mm, a wall thickness of 0.2~1.5mm, and a length of 20~100cm.

[0013] Furthermore, the connection between the multi-tube needle and the plug can be either a Luer fit or a non-Luer fit.

[0014] Furthermore, the plug is sleeved between the end of the multi-tube needle and the protruding structure, with its inner diameter matching the outer diameter of the protruding structure and an interference fit of 0.1~0.2mm.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] 1. When the silicone rubber tube is inverted, it hangs down naturally and is fully extended without folding or sticking to the wall, effectively increasing the contact area with the carrier gas compared to the flat type. The carrier gas enters from the bottom of the cavity, flows upward through the outside of the silicone rubber tube, and then exits from the top outlet pipe, forming a convection scouring effect. The desorbed organic matter is quickly carried away, the residual rate decreases, and the throughput is significantly improved.

[0017] 2. The device is lightweight and compact, making it easy to carry to the site; after enrichment, it can be directly fed into the detection equipment for analysis.

[0018] 3. When inverted, the silicone rubber tubes spread out radially, without any entanglement, ensuring that each tube is fully flushed by the carrier gas, thus solving the problem of uniform sampling in multi-tube devices. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a cross-sectional view of a silicone rubber multi-tube open-type enrichment device.

[0021] Figure 2 This is a schematic diagram of a silicone rubber multi-tube open-type enrichment device used for immersion enrichment and extraction in a water sample.

[0022] Figure 3 This is a schematic diagram of the thermal desorption heating container used in this utility model.

[0023] In the diagram: 1. Silicone rubber tube; 2. Multi-tube needle; 3. Plug; 4. Water sample. Detailed Implementation

[0024] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this utility model or its application or use. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0026] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to the present invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0027] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0028] In the description of this utility model, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0029] For ease of description, spatial relative terms such as "above," "over," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation besides the orientation of the device as described in the figures. For example, if the device in the figures is inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0030] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0031] like Figure 1 , Figure 2 As shown in the figure, this utility model embodiment discloses a silicone rubber multi-tube open-type enrichment device for organic matter in water, including a multi-tube needle 2, a silicone rubber tube 1 and a plug 3. The multi-tube needle has at least two needles, and the number of silicone rubber tubes corresponds to the number of needles. One end of the silicone rubber tube is sleeved on the outside of the needle tip of the multi-tube needle, and a plug is installed below the multi-tube needle.

[0032] The enrichment device for enriching organic matter is placed in such a way as Figure 3 The test is performed in the thermal desorption container shown. The inner side of the upper cover of the thermal desorption container is provided with a protruding structure. The end of the multi-tube needle is connected to the protruding structure through a plug to achieve an inverted installation.

[0033] The thermal desorption container used in this embodiment is existing technology, except that the upper cover of this utility model has been improved, so that the upper cover is provided with a protrusion for use with a multi-tube needle. The protrusion is integrally formed or bonded to the upper cover. The bottom of the thermal desorption container is provided with an electrothermal film and a PT100 sensor, and the air inlet pipe is located in the lower part of the cavity, and the air outlet pipe is located in the upper part of the cavity, forming a gas carrier path from bottom to top.

[0034] In actual use, align the Luer conical hole at the end of the multi-tube needle with the protrusion on the thermal desorption cover, insert the plug, and tighten it to achieve inverted fixation. The silicone rubber tube hangs naturally, evenly distributed, without any folds. When heated to the set temperature, organic matter is desorbed from the silicone rubber tube and enters the detection equipment through the outlet pipe along with the carrier gas.

[0035] Of course, the aforementioned protrusion and multi-tube needle can also be fixedly installed by using a spiral screw connection.

[0036] Furthermore, the number of needles in the multi-tube needle is 2 to 31, and the number of silicone rubber tubes is 2 to 31.

[0037] Furthermore, the needles of the multi-tube needle are arranged in a ring or linear array.

[0038] Furthermore, the outer diameter of the multi-tube needle is 0.25~4mm, the inner diameter of the tube is 0.1~3.5mm, and the length of the multi-tube needle is 1~5cm.

[0039] Furthermore, the silicone rubber tube has an inner diameter of 0.2~3.5mm, a wall thickness of 0.2~1.5mm, and a length of 20~100cm.

[0040] Furthermore, the connection between the multi-tube needle and the plug can be either a Luer fit or a non-Luer fit.

[0041] Furthermore, the plug is fitted between the end of the multi-tube needle and the protruding structure, with its inner diameter matching the outer diameter of the protruding structure, and an interference fit of 0.1~0.2mm.

[0042] Before actual use, one end of each silicone rubber tube is fitted onto the outside of the corresponding needle tip, and a plug is installed on the outside of the needle tip to form a silicone rubber multi-tube enricher. The silicone rubber multi-tube open-type enricher can enrich and extract organic samples from water samples, as well as from air and mixed gases.

[0043] During enrichment, the silicone rubber multi-tube open-type enricher is first immersed in the water sample, and the organic matter is quickly adsorbed and enriched on the outer and inner walls of the silicone rubber. The silicone rubber multi-tube open-type enricher is then removed from the water sample and placed in a heating container to begin thermal desorption. The inlet and outlet pipes are connected in series with the carrier gas of the ion migration tube, and the thermally desorbed organic matter gas enters the ion migration tube for analysis and detection.

[0044] In this embodiment, the aforementioned multi-tube needles can be directly purchased from dispensing needles used in fluid dispensing processes in the SMT, LED, semiconductor manufacturing, and pharmaceutical industries. The number of dispensing needles can be selected according to the actual experimental and testing scenarios.

[0045] It is also worth noting that the multi-tube needle and silicone rubber tubing of this invention are connected using a matching inner and outer diameter method, avoiding the need for a sealing ring in traditional testing. The material of the sealing ring can interfere with the enrichment of organic matter in the water, affecting the accuracy of subsequent analysis. This invention achieves the enrichment of organic matter entirely through silicone rubber tubing.

[0046] Specifically, the silicone rubber tube can be made of methyl vinyl silicone rubber. The multi-tube needle is made of stainless steel, with a disc-shaped base and needles arranged in a ring array, with a preset spacing between adjacent needles.

[0047] After using this invention, rapid enrichment for analysis can be achieved, and the enrichment and extraction of water samples can be completed within half an hour, which greatly shortens the analysis cycle and improves the detection efficiency. It is especially suitable for rapid on-site screening.

[0048] In this embodiment, 250 ml of a 1 ppm trichloroethylene solution was prepared with purified water and used as the test sample.

[0049] Method for enriching and extracting organic matter from water samples: The silicone rubber multi-tube enricher is pretreated in an oven at 100°C for 1 hour, then immersed in 250 ml of 1 ppm trichloroethylene aqueous solution and left at room temperature for 30 minutes. The silicone rubber multi-tube enricher is then removed, connected to the carrier gas of ion mobility spectrometry, and analyzed to obtain the corresponding analytical spectra and results.

[0050] The analytical conditions for ion mobility spectrometry (IMS) were as follows: positive ion mode was used during IMS operation; the ion migration tube temperature was 150℃; the inner diameter of the migration zone of the ion migration tube was 20 mm and the length was 7 cm; the inter-ring voltage was 330 V; the TP-type ion gate voltage was 340 V; the gate opening time was 50 μs; the duration of each analytical cycle was 10 ms; the average number of spectra was 10; the drift gas flow rate was 0.5 L / min; and the carrier gas flow rate was 0.2 L / min. The drift gas entered from the Faraday disk end of the migration tube, and the carrier gas entered from the reaction zone. In the reaction zone, the drift gas and the carrier gas flowed in the same direction. The outlet was located in the reaction zone near the radio frequency lamp.

[0051] In one embodiment, the multi-tube needle has two tubes, each with an outer diameter of 4 mm, an inner diameter of 3.5 mm, and a length of 1 cm. The silicone rubber tubes also have two sections, each with an inner diameter of 3.5 mm, a wall thickness of 1.5 mm, and a length of 10 cm. The connection between the multi-tube needle and the plug in the silicone rubber multi-tube open-type enrichment device uses a non-Luer fit. The series connection between the multi-tube needle and the ion mobility spectrometry carrier gas in the silicone rubber multi-tube open-type enrichment device also uses a non-Luer fit. The silicone rubber multi-tube enrichment device was used to enrich and extract organic matter from a water sample, followed by thermal desorption and ion mobility spectrometry analysis. The results showed that the characteristic peak mobility constant for tetrachloroethylene was 1.83 ± 0.03, and the maximum peak height was 1.5 V.

[0052] In another embodiment, the multi-tube needle has 31 tubes, each with an outer diameter of 0.25 mm, an inner diameter of 0.1 mm, and a length of 1-5 cm. The tubes in the central area have a length of 5 cm, while those in the peripheral area have a length of 1 cm to facilitate the installation of the silicone rubber tubing. There are 31 silicone rubber tubing units, each with an inner diameter of 0.2 mm, a wall thickness of 0.2 mm, and a length of 50 cm. The connection between the multi-tube needle and the plug of the aforementioned silicone rubber multi-tube enricher / open-type silicone rubber multi-tube enricher is... Next, a Luer coordination method was adopted; the series connection between the multi-tube needle of the silicone rubber multi-tube open-type enricher and the carrier gas of the ion mobility spectrometry was adopted using a Luer coordination method; the above-mentioned silicone rubber multi-tube open-type enricher was placed in air containing 1 ppm tetrachloroethylene at an air humidity of 20%RH, and organic matter was enriched and extracted from air gas according to the method, followed by heating thermal desorption and ion mobility spectrometry analysis. The results showed that the characteristic peak mobility constant of tetrachloroethylene was 1.83±0.03, and the maximum peak height was 4.6V.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A silicone rubber multi-tubed open enrichment device for organic matter in water, characterized by, It includes a multi-tube needle, a silicone rubber tube, and a plug. The multi-tube needle has at least two needles. The number of silicone rubber tubes corresponds to the number of needles. One end of the silicone rubber tube is sleeved on the outside of the needle tip of the multi-tube needle. A plug is installed below the multi-tube needle. An enrichment device for enriching organic matter is placed in a thermal desorption container for testing. The inner side of the upper cover of the thermal desorption container is provided with a protruding structure, and the end of the multi-tube needle is connected to the protruding structure through a plug to achieve an inverted installation.

2. The silicone rubber multi-tubed open-chamber concentrator for waterborne organics according to claim 1, characterized by, The number of needles in the multi-tube needle is 2 to 31, and the number of silicone rubber tubes is 2 to 31.

3. The silicone rubber multi-tubed open-chambered concentrator for aquatic organics of claim 1, wherein, The needles of the multi-tube needle are arranged in a ring or linear array.

4. The silicone rubber multi-tubed open-chambered concentrator of waterborne organics of claim 1, wherein, The multi-tube needle has an outer diameter of 0.25~4mm, an inner diameter of 0.1~3.5mm, and a length of 1~5cm.

5. The silicone rubber multi-tubed open-chambered concentrator of organic matter in water according to claim 1, characterized by, The inner diameter of the silicone rubber tube is 0.2~3.5mm, the wall thickness is 0.2~1.5mm, and the length is 20~100cm.

6. The silicone rubber multi-tube open-type enrichment device for organic matter in water according to claim 1, characterized in that, The connection between the multi-tube needle and the plug can be either a Luer fit or a non-Luer fit.

7. The silicone rubber multi-tubed open-chambered concentrator of waterborne organics of claim 1, wherein, The plug is fitted between the end of the multi-tube needle and the protruding structure, with its inner diameter matching the outer diameter of the protruding structure and an interference fit of 0.1~0.2mm.

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