A silicone rubber multi-tube enrichment device for collecting organic matter in water samples

Abstract

This utility model relates to the field of organic matter detection technology in aquatic environments. Addressing the problems of inconvenient operation, poor sealing, and low enrichment efficiency of existing membrane extraction devices, it provides a silicone rubber multi-tube enrichment device for collecting organic matter from water samples. The enrichment device includes two multi-tube needles, a corresponding number of silicone rubber tubes, and upper and lower plugs. The two ends of the silicone rubber tubes are respectively fitted onto the outside of the needle tips of the upper and lower multi-tube needles, and the plugs cooperate with the multi-tube needles for sealing. Through parallel enrichment of multiple tubes, the high adsorption capacity of silicone rubber, and a reliable sealing structure, rapid enrichment of organic matter in water samples is achieved. It is compatible with detection technologies such as ion mobility spectrometry, meeting the needs of both on-site and laboratory analysis, and significantly improving enrichment efficiency and ease of operation.

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 enrichment device for collecting organic matter in water samples. 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] In the field of organic matter detection in aquatic environments, efficient extraction technology is a core prerequisite for accurate analysis. Currently, mainstream extraction technologies include liquid-liquid extraction, solid-phase extraction, solid-phase microextraction, and membrane enrichment extraction. Among them, membrane enrichment extraction technology, with its unique separation mechanism, shows significant advantages in the extraction of volatile and semi-volatile organic compounds.

[0004] Specifically, static membrane extraction technology achieves mass transfer by keeping the water sample and the extract phase in static contact on both sides of the membrane. It is simple to operate and has few interfering factors, making it particularly suitable for the extraction of volatile organic compounds. Dynamic membrane extraction technology, on the other hand, significantly improves the mass transfer efficiency of organic matter on both sides of the membrane by integrating dynamic enhancement methods such as peristaltic pump circulation and stirring. Therefore, it is more suitable for processing water samples with complex composition and strong matrix interference.

[0005] 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

[0006] To address the aforementioned technical issues, a silicone rubber multi-tube enrichment device is provided for collecting organic matter from water samples. This device can rapidly enrich and extract organic matter from water samples, and subsequently use techniques such as ion mobility spectrometry to perform qualitative and quantitative analysis of these compounds. It is suitable for both on-site detection and laboratory analysis.

[0007] The technical means adopted in this utility model are as follows:

[0008] A silicone rubber multi-tube enrichment device for collecting organic matter in water samples includes two multi-tube needles, silicone rubber tubes, an upper plug, and a lower plug. Each multi-tube needle has the same number of needles, and at least two. 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 tip of the upper multi-tube needle, and the other end is sleeved on the outside of the tip of the lower multi-tube needle. An upper plug is installed above the upper multi-tube needle, and an upper plug is installed below the lower multi-tube needle.

[0009] Furthermore, the number of needles in the multi-tube needle is 2 to 15, and the number of silicone rubber tubes is 2 to 15.

[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 adopts a Luer fit; the connection between the multi-tube needle and the ion mobility spectrometry carrier gas source adopts a Luer fit.

[0014] Furthermore, the connection between the multi-tube needle and the plug adopts a non-Luer fit; the connection between the multi-tube needle and the ion mobility spectrometry carrier gas source adopts a non-Luer fit.

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

[0016] 1.2 to 15 silicone rubber tubes simultaneously contact the water sample, significantly increasing the effective contact area compared to a single-tube device, and simultaneously improving the adsorption rate of organic matter. The symmetrical distribution of multiple tubes ensures consistent adsorption conditions in each tube, enhancing the reliability of the detection data.

[0017] 2. The device is lightweight and compact, making it easy to carry to the field; the needle interface is directly compatible with the ion mobility spectrometry carrier gas system, and the enriched gas can be directly introduced into the detection equipment for analysis.

[0018] 3. No special tools are required for assembly; simply manually connect and tighten the plug, making the operation convenient. 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 enrichment device.

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

[0022] In the diagram: 1. Silicone rubber tube; 2. Upper multi-tube needle; 3. Lower multi-tube needle; 4. Upper plug; 5. Lower plug; 6. Water sample. Detailed Implementation

[0023] 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.

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] like Figure 1 , Figure 2 As shown in the figure, this utility model embodiment discloses a silicone rubber multi-tube enrichment device for collecting organic matter in water samples, including two multi-tube needles, silicone rubber tubes, an upper plug, and a lower plug. The number of needles in each multi-tube needle is the same and at least two. 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 upper multi-tube needle, and the other end is sleeved on the outside of the needle tip of the lower multi-tube needle. An upper plug is installed above the upper multi-tube needle, and an upper plug is installed below the lower multi-tube needle.

[0031] Furthermore, the number of needles in the multi-tube needle is 2 to 15, and the number of silicone rubber tubes is 2 to 15.

[0032] Furthermore, the needles of the multi-tube needle are arranged in a ring or linear array.

[0033] 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.

[0034] 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.

[0035] Furthermore, the connection between the multi-tube needle and the plug adopts a Luer fit; the connection between the multi-tube needle and the ion mobility spectrometry carrier gas source adopts a Luer fit.

[0036] Furthermore, the connection between the multi-tube needle and the plug adopts a non-Luer fit; the connection between the multi-tube needle and the ion mobility spectrometry carrier gas source adopts a non-Luer fit.

[0037] Before actual use, attach both ends of the silicone rubber tube to the outside of the needle tip, and install the upper and lower plugs on the outside of the needle in sequence to form a sealed silicone rubber multi-tube enrichment device.

[0038] It should be noted that when the silicone rubber tube is inserted and fitted onto the tube, the airtightness test is performed under a sealed static air pressure of 50 kPa for 1 minute, with a pressure drop of less than 8 kPa.

[0039] During the enrichment process, the silicone rubber multi-tube enricher is immersed in the water sample. Organic matter enters the inside of the silicone rubber tube through the outer wall of the silicone rubber and reaches equilibrium. The silicone rubber multi-tube enricher is then removed from the water sample, the two plugs are unscrewed, and it is connected in series to the carrier gas of the ion mobility spectrometer to analyze and detect the organic matter composition inside the silicone rubber tube.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] In this embodiment, 250 ml of a 1 ppm trichloroethylene solution was prepared with purified water and used as the test sample.

[0045] 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 the plugs at both ends are connected, and it is immersed in 250 ml of 1 ppm trichloroethylene aqueous solution. After being placed at room temperature for 30 minutes, the silicone rubber multi-tube enricher is removed, the plugs at both ends are removed, and it is connected to the carrier gas of ion mobility spectrometry for analysis to obtain the corresponding analytical spectra and results.

[0046] 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.

[0047] 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 have two tubes, each with an inner diameter of 3.5 mm, a wall thickness of 1.5 mm, and a length of 20 cm. Using the aforementioned silicone rubber multi-tube enricher, organic matter was extracted from a water sample using a method that yields organic matter enrichment. Ion mobility spectrometry analysis revealed that the characteristic peak mobility constant for trichloroethylene was 1.96 ± 0.03, and the maximum peak height was 1.2 V.

[0048] In another embodiment, the multi-tube needle has 15 tubes, 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, and the tubes in the peripheral area have a length of 1 cm to facilitate the installation of silicone rubber tubes. There are 15 silicone rubber tubes, with an inner diameter of 0.2 mm, a wall thickness of 0.2 mm, and a length of 100 cm. The above-mentioned silicone rubber multi-tube enricher is used to enrich and extract organic matter from water samples, and then analyzed by ion mobility spectrometry. The results show that the characteristic peak mobility constant of trichloroethylene is 1.96 ± 0.03, and the maximum peak height is 3.5 V.

[0049] 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-tube concentrator for collecting organic matter in a water sample, characterized by, It includes two multi-tube needles, silicone rubber tubing, an upper plug, and a lower plug. Each multi-tube needle has the same number of needles, and at least two. The number of silicone rubber tubing corresponds to the number of needles. One end of each silicone rubber tubing is fitted onto the outside of the tip of the upper multi-tube needle, and the other end is fitted onto the outside of the tip of the lower multi-tube needle. An upper plug is installed above the upper multi-tube needle, and an upper plug is installed below the lower multi-tube needle.

2. The silicone rubber multi-tubular concentrator for collecting organic matter in a water sample according to claim 1, characterized by, The number of needles in the multi-tube needle is 2 to 15, and the number of silicone rubber tubes is 2 to 15.

3. The silicone rubber multi-tubular concentrator for collecting organic matter in a water sample according to claim 1, characterized by, The needles of the multi-tube needle are arranged in a ring or linear array.

4. The silicone rubber multi-tubular concentrator for collecting organic matter in a water sample according to claim 1, characterized by, 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-tubular concentrator for collecting organic matter in a water sample 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-tubular concentrator for collecting organic matter in a water sample according to claim 1, characterized by, The connection between the multi-tube needle and the plug adopts a Luer fit; the connection between the multi-tube needle and the ion mobility spectrometry carrier gas source adopts a Luer fit.

7. The silicone rubber multi-tubular concentrator for collecting organic matter in a water sample according to claim 1, characterized by, The connection between the multi-tube needle and the plug adopts a non-Luer fit; the connection between the multi-tube needle and the ion mobility spectrometry carrier gas source adopts a non-Luer fit.

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