Toxic gas preparation and property verification device
By designing a device for the preparation and property verification of toxic gases, the integration, miniaturization, and universality of gas preparation and property experiments have been achieved. This solves the problems of high leakage risk, large reagent consumption, and lack of environmental awareness in existing technologies, thereby improving experimental safety and environmental benefits.
Patent Information
- Application Number
- CN202421992181.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-16
- Publication Date
- 2025-11-28
- Estimated Expiration
- 2034-08-16
AI Technical Summary
The current practice of preparing and testing toxic gases separately presents problems such as high risk of leakage, poor airtightness of equipment, large amount of reagents used, inconsistent instruments, and lack of environmental awareness.
A device for preparing and verifying the properties of toxic gases was designed, including a T-tube, a syringe, and a five-valve assembly, to achieve the integration, miniaturization, and universality of gas preparation and property experiments. The device utilizes a closed experimental apparatus for operation and streamlines reagent usage.
It integrates the preparation and property experiments of toxic gases, reduces the risk of leakage, saves reagents, improves environmental friendliness and ease of operation, and is suitable for experiments involving a variety of toxic gases.
Smart Images
Figure CN223612020U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the field of chemical device, especially is involved in the preparation and property verification device of toxic gas. BACKGROUND
[0002] Chemistry is a science based on experiments, and experiments are the foundation of the development of chemistry. The preparation and properties of matter are inseparable from chemical experiments. In the daily teaching process, when the preparation and properties of toxic gas are encountered, teachers are worried about the harm of toxic gas leakage to students' bodies, and students also have a panic psychology. Therefore, the preparation and properties of toxic gas are "avoided". Most teachers choose to play experimental videos instead of actual experiments, or even use "blackboard experiment", which is difficult to cultivate students' evidence reasoning and model cognition ability, and the core literacy of chemistry discipline cannot be implemented, which affects the teaching quality.
[0003] In the current teaching material, the preparation and properties of toxic gas have the following shortcomings:
[0004] 1. The preparation and properties of toxic gas are separated from each other: the number of experiments increases, and the risk of toxic gas leakage increases;
[0005] 2. Open instrument is used: the experimental instrument is mostly open instrument such as test tube, beaker and the like which directly contacts with the outside environment, pollutes the environment and lacks certain environmental protection consciousness.
[0006] 3. Poor air tightness of the device: gas is easy to leak, tail gas treatment is not complete, and certain harm is caused to the experimenter.
[0007] 4. Large amount of reagent is used: the experiment mostly uses open instrument such as test tube, and the amount of reagent used is large, which violates the principle of saving and environmental protection;
[0008] 5. The instrument is not unified: the instruments required for the preparation and properties of toxic gas such as Cl2, SO2, NO2 and NO are different, four different devices are needed, and the assembly is complex and troublesome.
[0009] In view of the above shortcomings, the preparation experiment and property experiment of toxic gas (Cl2, SO2, NO2 and NO) are integrated, and a set of integrated and miniaturized experimental device is developed. CONTENT OF THE UTILITY MODEL
[0010] Therefore, the utility model aims at providing a preparation and property verification device of toxic gas to solve at least one technical problem in the background art.
[0011] In order to achieve the above purpose, the technical scheme of the utility model is as follows:
[0012] The device for preparing and verifying the properties of toxic gas comprises a T-shaped pipe, a first syringe, a second syringe, a third syringe, and a five-way valve component.
[0013] The first syringe is in communication with the bottom of the T-shaped pipe, and the second syringe is in communication with one side of the middle part of the T-shaped pipe.
[0014] The third syringe is in communication with one side of the upper part of the T-shaped pipe, and the other side of the upper part of the T-shaped pipe is in communication with the five-way valve component.
[0015] The five-way valve component is sequentially provided with a fourth syringe, a fifth syringe, a sixth syringe, and a seventh syringe.
[0016] The other end of the five-way valve component is connected with a waste disposable infusion bag through a waste infusion hose.
[0017] Further, the middle part of the T-shaped pipe is provided with a first three-way valve, and the position of the first three-way valve corresponds to the position of the second syringe.
[0018] Further, the upper part of the T-shaped pipe is provided with a second three-way valve.
[0019] Further, the end of the five-way valve component is threadedly connected with one side of the T-shaped pipe.
[0020] Further, the five-way valve component comprises a five-way valve pipe, a three-way valve of a first five-way valve, a three-way valve of a second five-way valve, a three-way valve of a third five-way valve, a three-way valve of a fourth five-way valve, and a three-way valve of a fifth five-way valve.
[0021] The three-way valves of the first five-way valve, the second five-way valve, the third five-way valve, the fourth five-way valve, and the fifth five-way valve are sequentially arranged on the five-way valve pipe.
[0022] Further, the three-way valve of the first five-way valve corresponds to the position of the fourth syringe.
[0023] The three-way valve of the second five-way valve corresponds to the position of the fifth syringe.
[0024] The three-way valve of the third five-way valve corresponds to the position of the sixth syringe.
[0025] The three-way valve of the fourth five-way valve corresponds to the position of the seventh syringe.
[0026] Further, the five-way valve pipe is provided with a gas outlet hole, and the five-way valve pipe is provided with an internally-threaded plug at the gas outlet hole.
[0027] Further, the position of the internally-threaded plug corresponds to the position of the three-way valve of the fifth five-way valve.
[0028] Compared with the prior art, the device for preparing and verifying the properties of toxic gas has the following advantages:
[0029] 1. The toxic gas preparation and property verification device of this application is integrated. Using this experimental device, toxic gas preparation and multiple property experiments can be carried out in one unit, with comparison and progression, and the experimental phenomena are obvious.
[0030] 2. The toxic gas preparation and property verification device of this application is green. The preparation and property experiments of toxic gases are carried out in this closed experimental device, with no risk of leakage, which allows students to practice the concept of green chemistry experiments.
[0031] 3. The toxic gas preparation and property verification device of this application is compact and can save reagents. The experimental device uses a micro syringe, the amount of reagent used is small, the operation is simple and convenient, and the phenomenon is obvious.
[0032] 4. The toxic gas preparation and property verification device of this application is miniaturized. The experimental device is portable, compact and flexible, and easy to operate, and can be operated by hand.
[0033] 5. The toxic gas preparation and property verification device of this application is universal. Using this experimental device, the preparation and property experiments of various toxic gases (such as Cl2, SO2, NO2, NO) can be integrated into one, which has strong versatility. Attached Figure Description
[0034] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:
[0035] Figure 1 This is a schematic diagram of the toxic gas preparation and property verification device described in an embodiment of the present invention;
[0036] Figure 2 This is a schematic diagram of the toxic gas preparation and property verification device described in Embodiment 1 of this utility model;
[0037] Figure 3 This is a schematic diagram of the toxic gas preparation and property verification device described in Embodiment 2 of this utility model;
[0038] Figure 4 This is a schematic diagram of the toxic gas preparation and property verification device described in Embodiment 3 of this utility model;
[0039] Figure 5 This is a schematic diagram of the toxic gas preparation and property verification device described in Embodiment 4 of this utility model;
[0040] Figure 6The schematic diagram of the first syringe, the second syringe, the third syringe, the fourth syringe, the fifth syringe, the sixth syringe or the seventh syringe is shown in the embodiments of the utility model.
[0041] Marked for explanation:
[0042] 1, first syringe; 2, second syringe; 3, third syringe; 4, fourth syringe; 5, fifth syringe; 6, sixth syringe; 7, seventh syringe; 8, first three-way valve switch; 9, second three-way valve switch; 10, three-way valve of first five-union valve; 11, three-way valve of second five-union valve; 12, three-way valve of third five-union valve; 13, three-way valve of fourth five-union valve; 14, three-way valve of fifth five-union valve; 15, five-union valve part; 16, waste infusion hose; 17, waste disposable infusion bag; 18, internal thread plug; 19, pipe body; 20, piston rod; 21, injection tube; 22, T-shaped pipe. DETAILED DESCRIPTION
[0043] It should be noted that the embodiments in the utility model and the features in the embodiments can be combined with each other without conflict.
[0044] The utility model will be described in detail below with reference to the drawings and in combination with the embodiments.
[0045] As Figure 1 shown, the toxic gas preparation and property verification device includes a T-shaped pipe 22, a first syringe 1, a second syringe 2, a third syringe 3 and a five-union valve part 15; the first syringe 1 is in communication with the bottom of the T-shaped pipe 22, the second syringe 2 is in communication with one side of the middle part of the T-shaped pipe 22; the third syringe 3 is in communication with one side of the upper part of the T-shaped pipe 22, and the other side of the upper part of the T-shaped pipe 22 is in communication with the five-union valve part 15; the five-union valve part 15 is sequentially provided with a fourth syringe 4, a fifth syringe 5, a sixth syringe 6 and a seventh syringe 7;
[0046] The other end of the five-union valve part 15 is connected with a waste disposable infusion bag 17 through a waste infusion hose 16.
[0047] The middle part of the T-shaped pipe 22 is provided with a first three-way valve, and the position of the first three-way valve corresponds to the position of the second syringe 2. The upper part of the T-shaped pipe 22 is provided with a second three-way valve.
[0048] The end of the five-way valve component 15 is screwed with one side of the T-shaped pipe 22. The five-way valve component 15 includes a five-way valve pipe, a three-way valve 10 of a first five-way valve, a three-way valve 11 of a second five-way valve, a three-way valve 12 of a third five-way valve, a three-way valve 13 of a fourth five-way valve, and a three-way valve 14 of a fifth five-way valve; the three-way valve 10 of the first five-way valve, the three-way valve 11 of the second five-way valve, the three-way valve 12 of the third five-way valve, the three-way valve 13 of the fourth five-way valve, and the three-way valve 14 of the fifth five-way valve are sequentially arranged on the five-way valve pipe.
[0049] The three-way valve 10 of the first five-way valve corresponds to the position of the fourth syringe 4; the three-way valve 11 of the second five-way valve corresponds to the position of the fifth syringe 5; the three-way valve 12 of the third five-way valve corresponds to the position of the sixth syringe 6; and the three-way valve 13 of the fourth five-way valve corresponds to the position of the seventh syringe 7. The five-way valve pipe is provided with a gas outlet hole, and the five-way valve pipe is provided with an internally threaded plug 18 at the gas outlet hole. The position of the internally threaded plug 18 corresponds to the position of the three-way valve 14 of the fifth five-way valve.
[0050] In a specific implementation, the capacity of the first syringe 1 is 10 ml.
[0051] In a specific implementation, the capacity of the second syringe 2 is 5 ml.
[0052] In a specific implementation, the capacity of the third syringe 3 is 20 ml.
[0053] In a specific implementation, the capacities of the fourth syringe 4, the fifth syringe 5, the sixth syringe 6, and the seventh syringe 7 are 10 ml.
[0054] The first syringe 1, the second syringe 2, the third syringe 3, the fourth syringe 4, the fifth syringe 5, the sixth syringe 6, and the seventh syringe 7 each include a pipe body 19 and a piston rod 20.
[0055] The piston rod 20 is slidingly arranged in the pipe body 19.
[0056] One end of the pipe body 19 is slidingly provided with the piston rod 20, and the other end is screw-connected with a syringe pipe 21, and the end of the syringe pipe 21 is not provided with a needle.
[0057] The materials of the first syringe 1, the second syringe 2, the third syringe 3, the fourth syringe 4, the fifth syringe 5, the sixth syringe 6, and the seventh syringe 7 are plastic or glass.
[0058] The material of the T-shaped pipe 22 is plastic or glass.
[0059] If the stored substance or the reaction product has corrosive property, the glass material can be selected.
[0060] Example 1: Preparation and properties of chlorine gas
[0061] 1. Preparation of chlorine gas: The traditional laboratory preparation of chlorine gas uses a solid-liquid heating reaction device, which is complex and cumbersome to operate. The present experiment uses a solid-liquid non-heating reaction of potassium permanganate and concentrated hydrochloric acid.
[0062] 2. Property test of chlorine gas:
[0063] 1) Dry chlorine gas has no bleaching property, and moist chlorine gas has bleaching property: dry colored cloth and moist colored cloth can be used for testing;
[0064] 2) Chlorine gas has oxidizing property, which can be tested by moist starch potassium iodide test paper;
[0065] 3) Chlorine water has acidity and bleaching property, which can be tested by moist blue litmus paper;
[0066] 3. Tail gas treatment:
[0067] The tail gas is treated with 10% sodium hydroxide solution;
[0068] Experimental operation:
[0069] The following will be described in detail in combination with the accompanying drawings Figure 2 The device of the present application is described in further detail:
[0070] Taking the preparation and properties of chlorine gas as an example, the use process of the device for preparation and property verification of toxic gas is introduced:
[0071] The materials of the first syringe 1, the second syringe 2, and the fifth syringe 5 are glass.
[0072] The first syringe 1 contains potassium permanganate solid, the second syringe 2 contains concentrated hydrochloric acid, the third syringe 3 is empty and can collect gas and balance gas pressure, the fourth syringe 4 contains saturated salt water, the fifth syringe 5 contains concentrated sulfuric acid, the sixth syringe 6 contains dry colored cloth, the seventh syringe 7 contains moist colored cloth, moist starch potassium iodide test paper, and moist blue litmus paper, and the disposable infusion bag contains NaOH solution.
[0073] After connecting, check the air tightness of the device, open the first three-way valve switch 8, the second three-way valve switch 9, squeeze the second syringe 2, so that the concentrated hydrochloric acid drops into the first syringe 1, the concentrated hydrochloric acid reacts with the potassium permanganate solid to produce chlorine gas, the chlorine gas enters the T-shaped pipe 22, the chlorine gas enters the third syringe 3, and the third syringe 3 is squeezed, and the three-way valves 10, 11, 12, 13 and 14 of the first, second, third, fourth and fifth five-way valves are opened in turn, so that the chlorine gas enters the saturated NaCl solution of the fourth syringe 4, the concentrated sulfuric acid solution of the fifth syringe 5, and then contacts with the dry colored cloth strip of the sixth syringe 6, the wet colored cloth strip of the seventh syringe 7, the wet starch potassium iodide test paper and the wet blue litmus test paper, and observation is made: the dry colored cloth strip does not fade, the wet colored cloth strip fades, the wet starch potassium iodide test paper turns blue, and the wet blue litmus test paper turns red first and then fades.
[0074] After the demonstration, the third syringe 3 is squeezed again, so that the remaining Cl2 enters the infusion bag containing 10% NaOH solution for tail gas treatment, which is environmentally friendly and safe.
[0075] Example 2: Preparation and properties of SO2
[0076] 1. Preparation of sulfur dioxide: In this experiment, sulfur dioxide is prepared by solid-liquid reaction of sodium sulfite and concentrated sulfuric acid without heating;
[0077] 2. Property test of sulfur dioxide:
[0078] 1) Bleaching property of sulfur dioxide: can be tested by using magenta solution;
[0079] 2) Sulfur dioxide dissolved in water to form sulfurous acid has acidity: can be tested by using litmus solution;
[0080] 3) Reducing property of sulfur dioxide: can be tested by using acidic potassium permanganate solution;
[0081] 4) Reducing property of sulfur dioxide: can be tested by using bromine water.
[0082] 3. Tail gas treatment:
[0083] 10% sodium hydroxide solution is used for tail gas treatment.
[0084] The following will be described in detail in combination with the accompanying drawings Figure 3 The device of the utility model is further described in detail as follows:
[0085] Taking the preparation and properties of sulfur dioxide as an example, the use process of the integrated and miniaturized experimental device for preparation and properties of toxic gas is introduced:
[0086] The materials of the first syringe 1 and the second syringe 2 are glass.
[0087] The first syringe 1 contains sodium sulfite solid, the second syringe 2 contains 70% concentrated sulfuric acid, the third syringe 3 is empty and can be used to collect gas and balance gas pressure, the fourth syringe 4 contains fuchsin solution, the fifth syringe 5 contains litmus solution, the sixth syringe 6 contains acidic potassium permanganate, the seventh syringe 7 contains bromine water, and the disposable infusion bag contains 10% NaOH solution.
[0088] After connection, the air tightness of the device is tested, the first three-way valve switch 8 and the second three-way valve switch 9 are opened, the second syringe 2 is squeezed, and concentrated sulfuric acid is dropped into the first syringe 1 (liquid can enter the first syringe 1 through the injection tube 21), the concentrated sulfuric acid reacts with the Na2SO3 solid to produce sulfur dioxide, and the generated sulfur dioxide enters the third syringe 3. Squeeze the third syringe 3, and open the three-way valves 10, 11, 12, 13 and 14 of the first, second, third, fourth and fifth five-way valves in turn, so that SO2 enters the fuchsin solution in the fourth syringe 4, the litmus solution in the fifth syringe 5, the acidic potassium permanganate solution in the sixth syringe 6, and the bromine water in the seventh syringe 7 in turn. Observation: the fuchsin solution fades, the litmus solution turns red, the acidic potassium permanganate turns from purple to light purple, and the bromine water solution turns light.
[0089] After the demonstration is completed, the third syringe 3 is squeezed again, and the remaining SO2 is introduced into the last infusion bag containing 10% NaOH solution for tail gas treatment, which is environmentally friendly and safe.
[0090] Experiment three: preparation and properties of NO2
[0091] 1. Preparation of nitrogen dioxide: In this experiment, nitrogen dioxide is prepared by solid-liquid reaction of copper sheet and concentrated nitric acid without heating.
[0092] 2. Property test of nitrogen dioxide;
[0093] 1) Color of nitrogen dioxide: can be observed through the third syringe 3
[0094] 2) Nitric acid formed by dissolving nitrogen dioxide in water has acidity: can be tested by using litmus solution;
[0095] 3) Conversion of nitrogen dioxide to nitric oxide: can be converted by using litmus solution
[0096] 4) Conversion of nitric oxide to nitrogen dioxide: can be converted by using air
[0097] 3. Tail gas treatment: use 10% sodium hydroxide solution for tail gas treatment;
[0098] The following is combined with the drawings Figure 4The device is further described in detail as follows:
[0099] The use process of the integrated and miniaturized experimental apparatus for the preparation and properties of toxic gas is introduced by taking the preparation and properties of nitrogen dioxide as an example.
[0100] The material of the first syringe 1 and the second syringe 2 is glass.
[0101] The first syringe 1 contains copper piece solid, the second syringe 2 contains concentrated nitric acid, the third syringe 3 is empty and can be used for collecting gas and balancing gas pressure, the fourth syringe 4 contains litmus test solution, the fifth syringe 5 is filled with air, and the sixth syringe 6 and the seventh syringe 7 are standby, and the disposable infusion bag contains 10% NaOH solution.
[0102] After being connected, the air tightness of the device is tested, the first three-way valve switch 8 and the second three-way valve switch 9 are opened, the second syringe 2 is squeezed, the concentrated nitric acid is dropped into the first syringe 1, the concentrated nitric acid reacts with the copper piece solid to generate nitrogen dioxide, the generated nitrogen dioxide enters the third syringe 3, the third syringe 3 is squeezed, and the three-way valves three and four are opened in sequence, so that the NO2 is introduced into the litmus test solution of the fourth syringe 4 and the air of the fifth syringe 5 in sequence.
[0103] Observation: red-brown gas is collected in the third syringe 3, the litmus test solution turns red, the gas changes from red-brown to colorless, and after being introduced into the air of the fifth syringe 5, the gas changes from colorless to red-brown again.
[0104] After the demonstration is completed, the third syringe 3 is squeezed again, the remaining NO2 is introduced into the infusion bag containing 10% NaOH solution, tail gas treatment is performed, and the environment is safe.
[0105] Example 4: Preparation and properties of NO
[0106] 1. Preparation of nitrogen dioxide: the experimental apparatus utilizes the solid-liquid reaction of copper piece and dilute nitric acid without heating to prepare nitrogen monoxide.
[0107] 2. Property test of nitrogen monoxide:
[0108] 1) Color of nitrogen monoxide: the third syringe 3 can be used for observation;
[0109] 2) Conversion of nitrogen monoxide into nitrogen dioxide: air can be used for conversion;
[0110] 3) Nitric acid formed by dissolving nitrogen dioxide in water has acidity: litmus test solution can be used for test;
[0111] 4) Conversion of nitrogen dioxide into nitrogen monoxide: litmus test solution can be used for conversion.
[0112] 3. Tail gas treatment: using 10% sodium hydroxide solution for tail gas treatment;
[0113] The utility model discloses a device for demonstrating the preparation and property of toxic gas, and belongs to the field of experimental teaching. Figure 5 The device is further described in detail as follows:
[0114] Taking the preparation and property of nitric oxide as an example, the use process of the integrated and miniaturized experimental device for toxic gas preparation and property is introduced.
[0115] The first injector 1 and the second injector 2 are made of glass.
[0116] The first injector 1 contains copper sheet solid, the second injector 2 contains dilute nitric acid, the third injector 3 is empty and can collect gas and balance gas pressure, the fourth injector 4 is filled with air, the fifth injector 5 contains litmus test solution, the sixth injector 6 is filled with air, the seventh injector 7 is standby, and the disposable infusion bag contains 10% NaOH solution. The injectors are connected with each other by using three-way valves, and the infusion bag can be connected by using an infusion hose and a plug. After connection, the air tightness of the device is tested, the three-way valves are opened, the second injector 2 is squeezed, dilute nitric acid is dropped into the first injector 1, the dilute nitric acid reacts with the copper sheet solid to generate nitric oxide, the generated nitric oxide enters the third injector 3, the third injector 3 is squeezed, and the three-way valves 10, 11 and 12 of the first, second and third five-way valves are sequentially pressed, so that the NO is sequentially introduced into the air of the fourth injector 4, the litmus test solution of the fifth injector 5 and the air of the sixth injector 6.
[0117] Observation: colorless gas is generated in the third injector 3, the colorless gas becomes red-brown when introduced into the air of the fourth injector 4, the colorless solution becomes red when introduced into the distilled water with added litmus in the fifth injector 5, the gas becomes colorless from red-brown, and the gas becomes red-brown again after being introduced into the air of the fifth injector 5.
[0118] After the demonstration, the third injector 3, the fourth injector 4 and the sixth injector 6 are squeezed again, so that the remaining NO is fully converted into NO2 and then introduced into the infusion bag containing 10% NaOH solution for tail gas treatment, which is environmentally friendly and safe.
[0119] The above merely describes preferred embodiments of the utility model and is not intended to limit the utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.
Claims
1. A device for the preparation and verification of properties of toxic gases, characterized in that: The T-shaped tube, the first syringe, the second syringe, the third syringe, and the five-way valve component are included. The first syringe is in communication with the bottom of the T-shaped tube, and the second syringe is in communication with one side of the middle of the T-shaped tube. The third syringe is in communication with the other side of the upper part of the T-shaped tube. The other end of the five-way valve component is connected to the waste disposable infusion bag through the waste infusion hose. The solution for treating tail gas is arranged in the waste disposable infusion bag.
2. The toxic gas generation and property verification apparatus as claimed in claim 1, wherein: The first three-way valve is arranged in the middle of the T-shaped tube.
3. The toxic gas generation and property verification apparatus as claimed in claim 1, wherein: The second three-way valve is arranged in the upper part of the T-shaped tube.
4. The toxic gas generation and property verification apparatus as claimed in claim 1, wherein: The end of the five-way valve component is threadedly connected to one side of the T-shaped tube.
5. The toxic gas generation and property verification apparatus as claimed in claim 1, wherein: The five-way valve component includes the five-way valve pipeline, the three-way valve of the first five-way valve, the three-way valve of the second five-way valve, the three-way valve of the third five-way valve, the three-way valve of the fourth five-way valve, and the three-way valve of the fifth five-way valve. The three-way valve of the first five-way valve, the three-way valve of the second five-way valve, the three-way valve of the third five-way valve, the three-way valve of the fourth five-way valve, and the three-way valve of the fifth five-way valve are arranged on the five-way valve pipeline in sequence.
6. The apparatus for preparing and verifying properties of toxic gases as claimed in claim 5 wherein: The three-way valve of the first five-way valve corresponds to the position of the fourth syringe. The three-way valve of the second five-way valve corresponds to the position of the fifth syringe. The three-way valve of the third five-way valve corresponds to the position of the sixth syringe. The three-way valve of the fourth five-way valve corresponds to the position of the seventh syringe.
7. The toxic gas generation and property verification apparatus as claimed in claim 5, wherein: The five-way valve pipeline is provided with a gas outlet hole.
8. The toxic gas generation and property verification apparatus as claimed in claim 5, wherein: The five-way valve pipeline is provided with an internally threaded plug at the gas outlet hole. The position of the internally threaded plug corresponds to the position of the three-way valve of the fifth five-way valve.