Device for rapidly measuring estuary sediment sulfide

Abstract

The utility model relates to the technical field of estuary sediment sulfide determination, in particular to a device for rapidly determining estuary sediment sulfide. Comprising a cover body and an outer centrifugal tube, a connector is arranged on the cover body, a silicone tube is arranged in the connector and extends into the outer centrifugal tube, a three-way Luer lock is arranged above the silicone tube, an inner centrifugal tube is obliquely arranged in the outer centrifugal tube, and the cover body is in threaded connection with the outer centrifugal tube and covers the outer centrifugal tube. The cover body and the outer centrifugal tube are arranged to be of a threaded connection structure, the sealing performance can be improved, meanwhile, liquid can be prevented from spilling out, a solution and N2 can be conveniently injected through the Luer lock provided with the tee joint, therefore, the cover body does not need to be opened, and the practicability of the device is effectively improved through the design.

Description

Technical Field

[0001] The utility model relates to the technical field of estuarine sediment sulfide determination, in particular to a device for rapidly determining estuarine sediment sulfide. Background Art

[0002] In inorganic chemistry, sulfide refers to a class of compounds formed by highly electropositive metals or non-metals and sulfur. Most metal sulfides can be regarded as salts of hydrosulfuric acid; since hydrosulfuric acid is a dibasic weak acid, sulfides can be divided into three categories: acid salts (HS, hydrosulfide), normal salts (S) and polysulfides (S); in organic chemistry, sulfide (English: Sulfide) refers to organic compounds containing divalent sulfur; depending on the specific situation, organic sulfides may include: sulfide (RSR), thiophenol / thiol (Ar / R-SH), thioaldehyde (R-CSH), thiocarboxylic acid and disulfide (RSSR), etc.; sulfide is highly toxic and very harmful to the human body. Controlling sulfide is of utmost importance. For the control of sulfide, the sulfide content in the soil can be detected by sulfide detection equipment.

[0003] However, the existing sulfide detection device generally uses a flip-top cover to seal the centrifuge tube. This connection method has poor sealing performance and easily causes the liquid in the centrifuge tube to spill out. In addition, it is not convenient to add other liquids after the cover is closed on the centrifuge tube. Utility Model Content

[0004] The utility model aims to provide a device for quickly determining sulfide in estuary sediments, aiming to solve the technical problems that the existing sulfide detection devices in the prior art generally use a flip-top cover to seal the centrifuge tube, the sealing performance of this connection method is poor, the liquid in the centrifuge tube is easily spilled, and it is not convenient to add other liquids after the cover is closed on the centrifuge tube.

[0005] To achieve the above-mentioned purpose, the utility model adopts a device for quickly determining sulfide in estuary sediments, comprising a cover body and an outer centrifuge tube, the cover body is provided with a connector, a silicone tube is provided in the connector, and the silicone tube extends into the outer centrifuge tube, a three-way Luer lock is provided above the silicone tube, an inner centrifuge tube is obliquely provided in the outer centrifuge tube, the cover body is threadedly connected to the outer centrifuge tube, and covers the top of the outer centrifuge tube.

[0006] Wherein, the connecting head includes a first connecting block and a second connecting block, the first connecting block is fixedly connected to the second connecting block and is located on the second connecting block, the second connecting block is threadedly connected to the cover body and is located on the cover body, and the silicone tube is arranged between the first connecting block and the second connecting block.

[0007] Wherein, the connector also includes two sealing gaskets, which are respectively fixedly connected to the second connecting block and sleeved on the second connecting block. The two sealing gaskets are also respectively fixedly connected to the cover body and are located on the cover body, and the two sealing gaskets are mutually abutted.

[0008] Among them, the device for quickly determining sulfides in estuarine sediments also includes two first magnets and two second magnets. The inner side of the outer centrifuge tube has a slot. The two first magnets are respectively fixedly connected to the inner centrifuge tube and are located above the inner centrifuge tube and are also located in the slot. The two first magnets are also respectively fixedly connected to the outer centrifuge tube and are located on the outside of the outer centrifuge tube. The two second magnets are respectively fixedly connected to the inner centrifuge tube and are located below the inner centrifuge tube. The two second magnets are also respectively fixedly connected to the outer centrifuge tube and are located at the lower end of the inner wall of the outer centrifuge tube. The two first magnets are adsorbed to each other, and the two second magnets are adsorbed to each other.

[0009] Wherein, the device for rapidly determining sulfide in estuarine sediments also includes a solution injection port and a N2 injection port, the solution injection port is connected to the Luer lock and is located on the Luer lock, and the N2 injection port is connected to the Luer lock and is located on one side of the Luer lock.

[0010] The utility model discloses a device for rapidly determining sulfide in estuary sediments, comprising a cover body and an outer centrifuge tube, wherein the cover body is provided with a connector, a silicone tube is provided in the connector, and the silicone tube extends into the outer centrifuge tube, a three-way Luer lock is provided above the silicone tube, an inner centrifuge tube is obliquely provided in the outer centrifuge tube, the cover body is threadedly connected to the outer centrifuge tube and covers the top of the outer centrifuge tube, and by arranging the cover body and the outer centrifuge tube into a threaded connection structure, the sealing performance can be improved while preventing liquid from spilling, and the three-way Luer lock can facilitate the injection of solution and N2, thereby eliminating the need to open the cover body, and the present design effectively improves the practicability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0012] Figure 1 It is a three-dimensional stereogram of the device for quickly determining sulfide in estuary sediments of the utility model.

[0013] Figure 2 It is a front view of the device for quickly determining sulfide in estuary sediments of the utility model.

[0014] Figure 3 The utility model Figure 2 Section view along line AA.

[0015] Figure 4 The utility model Figure 3 A partial enlarged view of point B in the middle.

[0016] Figure 5 The utility model Figure 3 A partial enlarged view of point C in the middle.

[0017] 1-cover, 2-external centrifuge tube, 3-silicone tube, 4-Luer lock, 5-inner centrifuge tube, 6-first connecting block, 7-second connecting block, 8-sealing gasket, 9-first magnet, 10-second magnet, 11-card slot, 12-solution injection port, 13-N2 injection port. DETAILED DESCRIPTION

[0018] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0019] See also Figures 1 to 5 The utility model provides a device for quickly determining sulfide in estuary sediments, comprising a cover body 1 and an outer centrifuge tube 2, wherein the cover body 1 is provided with a connector, a silicone tube 3 is provided in the connector, and the silicone tube 3 extends into the outer centrifuge tube 2, a three-way Luer lock 4 is provided above the silicone tube 3, an inner centrifuge tube 5 is obliquely provided in the outer centrifuge tube 2, the cover body 1 is threadedly connected to the outer centrifuge tube 2, and covers the top of the outer centrifuge tube 2.

[0020] In this embodiment, the capacity of the outer centrifuge tube 2 is 100 mL, the capacity of the inner centrifuge tube 5 is 10 mL, and the inner centrifuge tube 5 is a covered type. The connector can facilitate the fixation of the silicone tube 3. Even if the covered inner centrifuge tube 5 is placed on a circular oscillator, when the circular velocity of the vibration is less than 250 rpm, the liquid (no more than 8 mL) in the inner centrifuge tube 5 will not flow out, and the inner centrifuge tube 5 can be tilted to allow it to be stuck in the outer centrifuge tube 2 without sticking to the sediment at the bottom of the outer centrifuge tube 2.

[0021] Furthermore, the connecting head includes a first connecting block 6 and a second connecting block 7, the first connecting block 6 is fixedly connected to the second connecting block 7 and is located on the second connecting block 7, the second connecting block 7 is threadedly connected to the cover body 1 and is located on the cover body 1, and the silicone tube 3 is arranged between the first connecting block 6 and the second connecting block 7.

[0022] In this embodiment, the first connecting block 6 and the second connecting block 7 are provided to facilitate fixing the silicone tube 3 , thereby facilitating the silicone tube 3 to inject liquid.

[0023] Furthermore, the connector also includes two sealing gaskets 8, which are respectively fixedly connected to the second connecting block 7 and sleeved on the second connecting block 7. The two sealing gaskets 8 are also respectively fixedly connected to the cover body 1 and are located on the cover body 1, and the two sealing gaskets 8 are against each other.

[0024] In this embodiment, the sealing gasket 8 can prevent air leakage between the second connecting block 7 and the cover body 1 .

[0025] Furthermore, the device for rapidly determining sulfide in estuarine sediments also includes two first magnets 9 and two second magnets 10. The inner side of the outer centrifuge tube 2 has a slot 11. The two first magnets 9 are respectively fixedly connected to the inner centrifuge tube 5 and are located above the inner centrifuge tube 5, and are also located in the slot 11. The two first magnets 9 are also respectively fixedly connected to the outer centrifuge tube 2 and are located on the outside of the outer centrifuge tube 2. The two second magnets 10 are respectively fixedly connected to the inner centrifuge tube 5 and are located below the inner centrifuge tube 5. The two second magnets 10 are also respectively fixedly connected to the outer centrifuge tube 2 and are located at the lower end of the inner wall of the outer centrifuge tube 2. The two first magnets 9 are adsorbed to each other, and the two second magnets 10 are adsorbed to each other.

[0026] In this embodiment, by providing two of the first magnets 9 and two of the second magnets 10, the inner centrifuge tube 5 can be kept in a tilted state and is not prone to shaking.

[0027] Furthermore, the device for rapidly determining sulfide in estuarine sediments also includes a solution injection port 12 and a N2 injection port 13. The solution injection port 12 is connected to the Luer lock 4 and is located on the Luer lock 4. The N2 injection port 13 is connected to the Luer lock 4 and is located on one side of the Luer lock 4.

[0028] In this embodiment, the solution can be easily injected through the solution injection port 12, and the N2 injection port 13 can be easily injected into N2.

[0029] In this embodiment, first, 2.0-25 g of fresh sediment sample is placed in the 100 mL outer centrifuge tube 2, and then 8 mL of NaOH and acid are placed in the 10 mL inner centrifuge tube 5, and the inner centrifuge tube 5 is clamped in the clamping groove 11 by the first magnet 9 and the second magnet 10 to prevent it from tipping over; vacuum grease is applied on the cover body 1, and after nitrogen is introduced for about 30 seconds, the cover body 1 is tightly closed, and all gaps in the cover body 1 are sealed by the sealing gasket 8; the entire device is placed in water to check whether bubbles are generated, so as to determine whether the device is airtight; after the airtightness check is passed, the Luer lock 4 is opened, and 6 M HC1 / 0.1M bad mud solution or acidic Cr(II) solution, and quickly close the device; the acidic Cr(II) solution preparation method uses CrCly3+6H2O mixed with 6M concentrated hydrochloric acid, and then adds zinc particles to reduce it into acidic Cr(II) solution; a large amount of heat is released during the reaction, so the experimental device uses a special thickened glass reaction vessel; when the reaction solution changes from green to blue, it means that the C solution changes from trivalent to divalent. At this time, immediately cover the lid of the reaction vessel and pass N2 to prevent the acidic Cr(I) from being oxidized.

[0030] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made according to the claims of the present invention still fall within the scope covered by the utility model.

Claims

1. A device for rapidly determining sulfide in estuarine sediments, characterized in that: It includes a cover body and an outer centrifuge tube, wherein the cover body is provided with a connector, a silicone tube is provided in the connector, and the silicone tube extends into the outer centrifuge tube, a three-way Luer lock is provided above the silicone tube, an inner centrifuge tube is obliquely provided in the outer centrifuge tube, the cover body is threadedly connected to the outer centrifuge tube, and covers the top of the outer centrifuge tube.

2. The device for rapidly determining sulfide in estuarine sediments according to claim 1, characterized in that: The connector includes a first connecting block and a second connecting block, the first connecting block is fixedly connected to the second connecting block and is located on the second connecting block, the second connecting block is threadedly connected to the cover body and is located on the cover body, and the silicone tube is arranged between the first connecting block and the second connecting block.

3. The device for rapidly determining sulfide in estuarine sediments according to claim 2, characterized in that: The connector also includes two sealing gaskets, which are respectively fixedly connected to the second connecting block and sleeved on the second connecting block. The two sealing gaskets are also respectively fixedly connected to the cover body and are located on the cover body, and the two sealing gaskets are mutually abutted.

4. The device for rapidly determining sulfide in estuarine sediments according to claim 3, characterized in that: The device for rapidly determining sulfide in estuarine sediments also includes two first magnets and two second magnets. The inner side of the outer centrifuge tube is provided with a slot. The two first magnets are respectively fixedly connected to the inner centrifuge tube and are located above the inner centrifuge tube and are also located in the slot. The two first magnets are also respectively fixedly connected to the outer centrifuge tube and are located on the outside of the outer centrifuge tube. The two second magnets are respectively fixedly connected to the inner centrifuge tube and are located below the inner centrifuge tube. The two second magnets are also respectively fixedly connected to the outer centrifuge tube and are located at the lower end of the inner wall of the outer centrifuge tube. The two first magnets are adsorbed to each other, and the two second magnets are adsorbed to each other.

5. The device for rapidly determining sulfide in estuarine sediments according to claim 4, characterized in that: The device for rapidly determining sulfide in estuarine sediments also includes a solution injection port and a N2 injection port. The solution injection port is connected to the Luer lock and is located on the Luer lock. The N2 injection port is connected to the Luer lock and is located on one side of the Luer lock.

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