CN216082497U - A kind of diffusion dish for soil alkaline hydrolysis nitrogen determination - Google Patents
A kind of diffusion dish for soil alkaline hydrolysis nitrogen determination Download PDFInfo
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- CN216082497U CN216082497U CN202121815396.7U CN202121815396U CN216082497U CN 216082497 U CN216082497 U CN 216082497U CN 202121815396 U CN202121815396 U CN 202121815396U CN 216082497 U CN216082497 U CN 216082497U
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- dish
- soil
- diffusion
- alkaline hydrolysis
- inner chamber
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 48
- 238000009792 diffusion process Methods 0.000 title claims abstract description 43
- 239000002689 soil Substances 0.000 title claims abstract description 42
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 24
- 238000005904 alkaline hydrolysis reaction Methods 0.000 title claims abstract description 20
- 239000004743 Polypropylene Substances 0.000 claims description 10
- 229920001155 polypropylene Polymers 0.000 claims description 10
- -1 polypropylene Polymers 0.000 claims description 7
- 238000005259 measurement Methods 0.000 claims description 4
- 239000011521 glass Substances 0.000 abstract description 11
- 239000004033 plastic Substances 0.000 abstract description 9
- 229920003023 plastic Polymers 0.000 abstract description 9
- 239000000463 material Substances 0.000 abstract description 8
- 238000004448 titration Methods 0.000 abstract description 5
- 239000002253 acid Substances 0.000 abstract description 4
- 239000007789 gas Substances 0.000 abstract description 3
- 239000003513 alkali Substances 0.000 abstract description 2
- 238000013461 design Methods 0.000 abstract description 2
- 238000001514 detection method Methods 0.000 abstract description 2
- 230000003670 easy-to-clean Effects 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 18
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 17
- 239000002585 base Substances 0.000 description 17
- 238000007789 sealing Methods 0.000 description 14
- 239000005337 ground glass Substances 0.000 description 8
- 238000002474 experimental method Methods 0.000 description 7
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 6
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 5
- 239000004327 boric acid Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000003292 glue Substances 0.000 description 4
- 229910021529 ammonia Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000005338 frosted glass Substances 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000011790 ferrous sulphate Substances 0.000 description 2
- 229910000359 iron(II) sulfate Inorganic materials 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 125000001477 organic nitrogen group Chemical group 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- MMDJDBSEMBIJBB-UHFFFAOYSA-N [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] Chemical compound [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] MMDJDBSEMBIJBB-UHFFFAOYSA-N 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000002775 capsule Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000012258 culturing Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 235000003891 ferrous sulphate Nutrition 0.000 description 1
- 230000035558 fertility Effects 0.000 description 1
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 238000010561 standard procedure Methods 0.000 description 1
- 239000012086 standard solution Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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- Sampling And Sample Adjustment (AREA)
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
Abstract
本实用新型公开了一种土壤碱解氮测定用扩散皿，属于土壤检测工具技术领域，该扩散皿包括皿盖、皿体和底座，皿体位于底座内，皿盖与底座可拆卸连接。本实用新型耐酸碱、耐磨损、易清洗，与传统玻璃扩散皿相比，不易破损，可有效减少实验损耗；通过设置分离式内外室，可独立取出用于土样称量、溶液加注和滴定，结构简单、操作方便，避免由于操作不当造成的试验误差，可以提高实验效率及准确性，简化了实验步骤，适用于大批量土壤样品的测定；可有效避免气体泄漏；工作槽底部采用圆角设计，有效减少因塑料材料表面张力在转角产生气泡，使土样与溶液充分反应。
The utility model discloses a diffusion dish for soil alkaline hydrolysis nitrogen determination, which belongs to the technical field of soil detection tools. Compared with the traditional glass diffusion dish, the utility model is resistant to acid and alkali, wear and tear, and is easy to clean. Compared with the traditional glass diffusion dish, the utility model is not easy to be damaged and can effectively reduce the experimental loss; Note and titration, with simple structure and convenient operation, can avoid experimental errors caused by improper operation, can improve experimental efficiency and accuracy, simplify experimental steps, and be suitable for the determination of large quantities of soil samples; can effectively avoid gas leakage; the bottom of the working tank The rounded corner design can effectively reduce the bubbles generated at the corners due to the surface tension of the plastic material, so that the soil sample can fully react with the solution.
Description
Technical Field
The utility model belongs to the technical field of soil detection tools, and particularly relates to a diffusion vessel for soil alkaline hydrolysis nitrogen determination.
Background
The soil nitrogen supply capability is one of important indexes for evaluating soil fertility, wherein alkaline hydrolysis nitrogen comprises inorganic nitrogen and organic nitrogen, and is also called quick-acting nitrogen because the alkaline hydrolysis nitrogen can be absorbed and utilized by crops recently. In soil physicochemical property experiments of students, soil alkaline hydrolysis nitrogen is an important index. The method for measuring the soil alkaline hydrolysis nitrogen mainly comprises the step of treating soil with alkali liquor to convert organic nitrogen and ammonium nitrogen which are easy to hydrolyze into ammonia, and converting nitrate nitrogen into ammonium by ferrous sulfate. The content of the hydrolyzed nitrogen was calculated by absorbing ammonia with boric acid and titrating with a standard acid.
The standard method for measuring the soil hydrolyzable nitrogen in China at the present stage mainly adopts an alkaline hydrolysis diffusion method, and a measuring device of the method in a laboratory is mainly a ground diffusion vessel with a ground glass sheet, and the whole diffusion vessel main body is divided into an inner chamber and an outer chamber. In the experiment, a tested soil sample needs to be uniformly paved on an outer chamber of a diffusion dish, and then a boric acid indicator is added into an inner chamber; coating alkaline glue solution on the edge of the outer chamber, covering a frosted glass sheet, and rotating the frosted glass for several times to completely bond the edge of the diffusion vessel and the frosted glass; the ground glass was then slowly rotated to leak out of a slit where sodium hydroxide solution was rapidly added to the outer chamber of the diffusion dish, primarily for the purpose of treating the soil with lye. Then immediately using the ground glass cover to tightly seal, rotating the diffusion vessel to fully mix the external chamber solution and the tested soil sample, then using the rubber band to fix the ground glass, and moving the ground glass into a constant temperature box.
The diffusion dish that adopts in the experiment is glass diffusion dish mostly, and glass diffusion dish has following defect:
1. the glass diffusion vessel is high in price, heavy and easy to damage, and is not suitable for measuring a large batch of soil samples;
2. the sealing effect of the ground glass sheet and the glass diffusion vessel is poor, and the alkaline glue solution is not uniformly coated, so that air leakage is easily caused, and the experimental result is influenced;
3. when the alkaline glue solution is coated, the coating operation is complicated, samples are easily polluted, and the alkaline solution is difficult to clean and is stained in a vessel, so that experimental errors are easily caused;
4. the ground glass sheets need to be opened, closed and rotated for many times in the experimental process, the experimental efficiency is low, and the work division and cooperation are difficult;
5. after the liquid seal is carried out by using the alkaline glue, the ground glass sheet is not easy to be uncovered, and the sample liquid in the inner chamber and the outer chamber is easy to overturn, so that the pollution to the tested sample is caused;
6. the vessel body needs to be shaken for many times in the processes of soil sample weighing, solution filling and titration, and the inner chamber is easy to be polluted by the sample in the outer chamber.
In recent years, plastic diffusion vessels made of Polyethylene (PE) and polypropylene (PP) have been used in experiments, and at present, the plastic diffusion vessels have the following defects:
1. the existing plastic diffusion vessel upper cover and vessel body are only sealed by manually screwing a threaded port, so that the actual sealing effect is poor;
2. the inside diapire of plastics diffusion ware is mostly the right angle with the lateral wall junction, because of material surface tension, the solution back of annotating easily forms the bubble in soil sample.
SUMMERY OF THE UTILITY MODEL
The technical problem is as follows: aiming at the problems in the prior art, the utility model aims to solve the technical problem of providing a diffusion vessel for soil alkaline hydrolysis nitrogen determination, which is efficient and has good sealing effect.
The technical scheme is as follows: in order to solve the technical problems, the technical scheme adopted by the utility model is as follows:
the diffusion vessel for measuring the soil alkaline hydrolysis nitrogen comprises a vessel cover, a vessel body and a base, wherein the vessel body is positioned in the base, and the vessel cover is detachably connected with the base.
Preferably, the utensil body comprises an outer chamber body and an inner chamber body, the outer chamber body is in a ring shape with a cylindrical through hole in the middle, an outer chamber working groove is formed in the outer chamber body, the inner chamber body is in a cylindrical shape with the inner chamber working groove, and the diameter of the bottom surface of the inner chamber body is smaller than that of the bottom surface of the through hole.
Preferably, the height of the inner chamber body is higher than the height of the outer chamber body.
Preferably, a fixed ring body is arranged in the base, and the outer diameter of the bottom surface of the fixed ring body is equal to the diameter of the bottom surface of the through hole.
Preferably, the junction of the side wall and the bottom wall of the outer chamber working groove is arc-shaped, and the junction of the side wall and the bottom wall of the inner chamber working groove is arc-shaped.
Preferably, the dish cover comprises a cover body and a sealing ring, and the cover body is provided with a sealing ring groove corresponding to the sealing ring.
Preferably, the dish cover is in threaded connection with the base.
Preferably, the dish body is made of polypropylene.
Has the advantages that: compared with the prior art, the utility model has the following advantages: 1. the diffusion vessel is integrally made of polypropylene (PP) materials, is acid-base resistant, wear resistant and easy to clean, is not easy to damage compared with the traditional glass diffusion vessel, and can effectively reduce experiment loss; 2. the diffusion vessel is provided with the separated inner chamber and the separated outer chamber, can be independently taken out for soil sample weighing, solution filling and titration, has a simple structure and convenient operation, avoids test errors caused by improper operation, can improve the experimental efficiency and accuracy, simplifies the experimental steps, and is suitable for measuring mass soil samples; 3. compared with the existing plastic diffusion vessel, the diffusion vessel has the advantages that the vessel cover is provided with the sealing groove, and the silicon rubber gasket is arranged in the sealing groove and matched with the spiral opening, so that gas leakage can be effectively avoided; 4. the bottom of the working tank adopts a fillet design, so that bubbles generated at corners due to the surface tension of plastic materials are effectively reduced, and the soil sample and the solution are fully reacted.
Drawings
FIG. 1 is an exploded view of the structure of the present invention;
FIG. 2 is a schematic cross-sectional view of the capsule of the present invention;
FIG. 3 is a schematic cross-sectional view of the outer housing of the present invention;
FIG. 4 is a schematic cross-sectional view of the internal chamber body of the present invention;
figure 5 is a schematic cross-sectional view of a base of the present invention.
Detailed Description
The present invention will be further illustrated by the following specific examples, which are carried out on the premise of the technical scheme of the present invention, and it should be understood that these examples are only for illustrating the present invention and are not intended to limit the scope of the present invention.
As shown in figure 1, a diffusion vessel for soil alkaline hydrolysis nitrogen determination comprises a vessel cover 1, a vessel body 2 and a base 3, wherein the vessel body 2 is positioned in the base 3, concave spiral lines are arranged on the vessel cover 1, corresponding convex spiral lines are arranged on the outer side of the base 3, the vessel cover 1 and the base 3 are detachably connected through threads (the vessel cover 1 and the base 3 can also be connected through other detachable modes such as a buckle), and the vessel body 2 can be taken out when the vessel cover 1 is opened. The dish body 2 comprises an outer chamber body 21 and an inner chamber body 22, the outer chamber body 21 is in a ring shape with a cylindrical through hole 211 in the middle, an outer chamber working groove 212 is formed in the outer chamber body 21, and the outer chamber working groove 212 is used for containing soil samples and filling sodium hydroxide solution; the inner chamber body 22 is cylindrical with an inner chamber working groove 221, the inner chamber working groove 221 is used for filling the boric acid indicator, the diameter of the bottom surface of the inner chamber body 22 is smaller than that of the bottom surface of the through hole 211, so that the inner chamber body 22 can be put in and taken out from the cylindrical through hole 211 of the outer chamber body 21, the height of the inner chamber body 22 is higher than that of the outer chamber body 21, and when the inner chamber body 22 and the outer chamber body 21 are put into the base 3 together, the taking-out is convenient due to the higher height of the inner chamber body 22.
As shown in fig. 1 and 5, a fixing ring body 31 is provided in the base 3, an outer diameter of a bottom surface of the fixing ring body 31 is equal to a diameter of a bottom surface of the through hole 211, and an inner diameter of a bottom surface of the fixing ring body 31 is equal to a diameter of a bottom surface of the inner chamber body 22, so that the fixing ring body 31 can fix the inner chamber body 22 and the outer chamber body 21 in the base 3.
As shown in fig. 2, the dish cover 1 includes a cover body 11 and a sealing ring 12, the cover body 11 is provided with a sealing ring groove 111 corresponding to the sealing ring 12, the sealing ring 12 can be made of silica gel, and when the cover body 11 is screwed down, the sealing ring 12 plays a good role in sealing, so as to avoid gas leakage.
As shown in fig. 3, the outer chamber working tank 212 is an annular body, and the joint of the side wall and the bottom wall of the outer chamber working tank is a round angle, so that bubbles generated at the corner due to the surface tension of the plastic material are effectively reduced, and the soil sample and the solution are fully reacted.
As shown in fig. 4, the inner chamber working groove 221 is cylindrical, and the joint of the side wall and the bottom wall is a round angle, which effectively reduces the generation of bubbles at the corner due to the surface tension of the plastic material.
The ware body 2 is made by polypropylene (PP) material, and acid and alkali-resistance, stand wear and tear, easy washing, and ware lid 1 and base 3 are made by polypropylene (PP) material, compare with traditional glass diffusion ware, and difficult damage reduces the experiment loss.
A using step;
the method comprises the following steps: 1.00g-2.00g (accurate to 0.01g) of air-dried soil sample which is sieved by a 2mm sieve is weighed and evenly paved in an outer chamber working groove 212 of an outer chamber body 21, and simultaneously 1g of zinc-ferrous sulfate reducing agent is added and paved on the soil sample.
Step two: 3.0mL of a 20g/L boric acid indicator solution was added to the inner chamber working tank 221 of the inner chamber body 22.
Step three: adding 10.0mL of 1.8mol/L sodium hydroxide solution into the outer chamber working groove 212, quickly putting the outer chamber body 21 and the inner chamber body 22 into the base 3 in sequence, then immediately covering the dish cover 1, forming a seal by manual rotary extrusion, and carefully rotating the whole diffusion dish to uniformly mix the soil sample and the sodium hydroxide solution.
Step four: placing in a thermostat, and culturing at 40 deg.C for 24 hr while intermittently and slightly rotating for 2-3 times to make the outer chamber fully react.
Step five: and taking out the whole diffusion dish after 24 hours, carefully taking out the inner chamber body 22, titrating the ammonia amount absorbed in boric acid of the inner chamber body 22 by using 0.01mol/L hydrochloric acid standard solution, slightly shaking the inner chamber body 22 during titration, and dipping the standard acid solution at the tip of the burette by using a glass rod when the solution is purple so as to prevent the solution from passing through the end point, wherein the color is changed from blue to purplish red, and the end point is reached.
Step six: and simultaneously carrying out reagent blank and standard soil sample measurement on the sample.
The data result analysis (see table 1) shows that, when 9 groups of soil samples are used for carrying out the control experiment, the volume test result of the sodium hydroxide solution consumed by titration without using a glass diffusion dish is taken as the true value and is basically consistent with the standard deviation and the relative standard deviation of the utility model, and the data result of the utility model is slightly superior to that of the brand new glass diffusion dish:
TABLE 1
The foregoing is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be construed as the protection scope of the present invention.
Claims (8)
1. The diffusion dish for measuring the soil alkaline hydrolysis nitrogen is characterized by comprising a dish cover (1), a dish body (2) and a base (3), wherein the dish body (2) is positioned in the base (3), and the dish cover (1) is detachably connected with the base (3).
2. The diffusion dish for soil alkaline hydrolysis nitrogen determination according to claim 1, wherein the dish body (2) comprises an outer chamber body (21) and an inner chamber body (22), the outer chamber body (21) is in a ring shape with a cylindrical through hole (211) in the middle, an outer chamber working groove (212) is formed in the outer chamber body (21), the inner chamber body (22) is in a cylindrical shape with an inner chamber working groove (221), and the diameter of the bottom surface of the inner chamber body (22) is smaller than that of the bottom surface of the through hole (211).
3. The diffusion dish for soil alkaline hydrolysis nitrogen measurement according to claim 2, wherein the height of the inner chamber body (22) is higher than the height of the outer chamber body (21).
4. The diffusion dish for soil alkaline hydrolysis nitrogen determination according to claim 2, wherein a fixed ring body (31) is provided in the base (3), and the outer diameter of the bottom surface of the fixed ring body (31) is equal to the diameter of the bottom surface of the through hole (211).
5. The diffusion dish for soil alkaline hydrolysis nitrogen determination according to claim 2, wherein a junction between the side wall and the bottom wall of the outer chamber working tank (212) is arc-shaped, and a junction between the side wall and the bottom wall of the inner chamber working tank (221) is arc-shaped.
6. The diffusion dish for soil alkaline hydrolysis nitrogen measurement according to claim 1, wherein the dish lid (1) comprises a lid body (11) and a seal ring (12), and the lid body (11) is provided with a seal ring groove (111) corresponding to the seal ring (12).
7. The diffusion dish for soil alkaline hydrolysis nitrogen determination according to claim 1, wherein the dish lid (1) is screwed to the base (3).
8. The diffusion dish for soil alkaline hydrolysis nitrogen measurement according to claim 1, wherein the dish body (2) is made of polypropylene.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121815396.7U CN216082497U (en) | 2021-08-04 | 2021-08-04 | A kind of diffusion dish for soil alkaline hydrolysis nitrogen determination |
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| CN202121815396.7U CN216082497U (en) | 2021-08-04 | 2021-08-04 | A kind of diffusion dish for soil alkaline hydrolysis nitrogen determination |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118150556A (en) * | 2024-05-09 | 2024-06-07 | 中国地质调查局昆明自然资源综合调查中心 | Method for measuring mineralized carbon content in soil |
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2021
- 2021-08-04 CN CN202121815396.7U patent/CN216082497U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118150556A (en) * | 2024-05-09 | 2024-06-07 | 中国地质调查局昆明自然资源综合调查中心 | Method for measuring mineralized carbon content in soil |
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