CN219810899U - Automatic pretreatment device for monitoring aldehyde ketone compounds in ambient air - Google Patents
Automatic pretreatment device for monitoring aldehyde ketone compounds in ambient air Download PDFInfo
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- CN219810899U CN219810899U CN202320810070.8U CN202320810070U CN219810899U CN 219810899 U CN219810899 U CN 219810899U CN 202320810070 U CN202320810070 U CN 202320810070U CN 219810899 U CN219810899 U CN 219810899U
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- glass
- outer cover
- tube
- ambient air
- glass outer
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- -1 aldehyde ketone compounds Chemical class 0.000 title claims abstract description 26
- 239000012080 ambient air Substances 0.000 title claims abstract description 23
- 238000012544 monitoring process Methods 0.000 title claims abstract description 19
- 239000011521 glass Substances 0.000 claims abstract description 79
- 238000005070 sampling Methods 0.000 claims abstract description 39
- 238000007789 sealing Methods 0.000 claims abstract description 12
- 238000010828 elution Methods 0.000 abstract description 10
- 238000000034 method Methods 0.000 abstract description 10
- 231100000331 toxic Toxicity 0.000 abstract description 5
- 230000002588 toxic effect Effects 0.000 abstract description 5
- 239000003153 chemical reaction reagent Substances 0.000 abstract description 4
- 239000003480 eluent Substances 0.000 description 16
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 description 15
- 238000001514 detection method Methods 0.000 description 7
- 230000005484 gravity Effects 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 239000000741 silica gel Substances 0.000 description 4
- 229910002027 silica gel Inorganic materials 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000003570 air Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000007306 turnover Effects 0.000 description 2
- WVVOBOZHTQJXPB-UHFFFAOYSA-N N-anilino-N-nitronitramide Chemical compound [N+](=O)([O-])N(NC1=CC=CC=C1)[N+](=O)[O-] WVVOBOZHTQJXPB-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- 150000001299 aldehydes Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000004128 high performance liquid chromatography Methods 0.000 description 1
- 150000007857 hydrazones Chemical class 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000002414 normal-phase solid-phase extraction Methods 0.000 description 1
- 239000002574 poison Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000012855 volatile organic compound Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The utility model relates to a rapid automatic pretreatment device for monitoring aldehyde ketone compounds in ambient air, which comprises a glass outer cover, wherein a first supporting plate for supporting a glass screw tip bottom scale tube is arranged in the glass outer cover; a second supporting plate for supporting the sampling tube is arranged above the glass outer cover, and a closed space is formed between the glass outer cover and the second supporting plate; a plurality of control valves for connecting the sampling tube with the glass screw pointed bottom scale tube are arranged on the second supporting plate; the side wall of the glass outer cover is connected with an external vacuum pump and is used for forming micro negative pressure in the glass outer cover. Through aligning the glass screw pointed end scale tube, the control valve and the sampling tube and sealing the support, a closed space is formed, the vacuum pump is utilized for vacuumizing, and the closed space and the outside have pressure difference, so that the automatic elution process is completed in a very short time, the working efficiency can be improved, and the toxic hazard risk caused by volatilization of the organic reagent can be greatly reduced or even basically avoided.
Description
Technical Field
The utility model relates to the technical field of atmosphere monitoring, in particular to a rapid automatic pretreatment device for monitoring aldehyde ketone compounds in ambient air.
Background
The department of environmental protection in 2014 promulgated the national environmental protection standard of "high performance liquid chromatography for the determination of ambient air aldehydes and ketones" (HJ 683-2014). The principle of measuring aldehyde ketone compounds in the ambient air is comprehensively described: collecting a certain volume of air sample by using a sampling tube filled with a 2.4 Dinitrophenylhydrazine (DNPH) silica gel adsorbent, catalyzing aldehyde ketone compounds in the sample by strong acid to react with DNPH coated on the silica gel to generate stable and colored hydrazone derivatives, eluting by acetonitrile, detecting by means of a diode array of a high performance liquid chromatograph or an ultraviolet (360 nm) detector, and determining retention time and peak area.
In the pretreatment process of detecting the aldehyde ketone compounds in the ambient air, the air sample collected in the sampling tube is eluted through toxic eluent (acetonitrile), the eluted liquid is required to be collected into a glass screw pointed bottom scale tube, and finally, the liquid chromatograph is used for detection. The elution process is complicated, and usually requires that a detector holds the sampling tube with one hand to enable the outlet of the sampling tube to be aligned with the glass screw sharp-bottomed graduated tube, holds the injector with the other hand to carefully inject acetonitrile into the inlet of the sampling tube, and enables all eluent in the sampling tube to flow out and be injected into the glass screw sharp-bottomed graduated tube under the action of gravity. The one-time elution process usually lasts for 4-5 minutes, is very hard, can be sprayed out by a little careless eluent, and meanwhile, acetonitrile is a volatile organic compound and can also generate a certain toxic hazard.
In the related art, publication number is CN215179950U, publication number is 2021-12-14 discloses an atmospheric aldehyde ketone compound pretreatment support, including the volumetric flask bottom plate, the parallel support in top of volumetric flask bottom plate has the bottleneck backup pad, the parallel support in top of bottleneck backup pad has the second backup pad, the parallel support in top of second backup pad has the syringe backup pad, be used for in the preliminary treatment process of detecting atmospheric aldehyde ketone compound, aim at the volumetric flask, the sampling tube, the syringe is held up, the piston of syringe is under the action of gravity, eluent that can force therein flows in the sampling tube naturally, finally flow in the volumetric flask, can alleviate the amount of labour that the inspector held the operation, but still need rely on gravity to make the eluent in the syringe flow through the sampling tube again and pour into the volumetric flask in total, consuming time, detection efficiency is low, and acetonitrile easily volatilizes.
Disclosure of Invention
In order to overcome the defects in the prior art, the utility model provides a rapid automatic pretreatment device for monitoring aldehyde ketone compounds in ambient air, which adopts the following technical scheme:
the rapid automatic pretreatment device for monitoring aldehyde ketone compounds in ambient air comprises a glass outer cover, wherein a first supporting plate for supporting a glass screw pointed bottom scale tube is arranged in the glass outer cover; a second supporting plate for supporting the sampling tube is arranged above the glass outer cover, and a closed space is formed between the glass outer cover and the second supporting plate; a plurality of control valves for connecting the sampling tube with the glass screw pointed bottom scale tube are arranged on the second supporting plate; the side wall of the glass outer cover is connected with an external vacuum pump and used for forming micro negative pressure in the glass outer cover.
By adopting the technical scheme, when the eluent injection valve is used, the second support plate is taken down, the glass screw pointed bottom scale tube is placed in the first support plate, then the second support plate is placed on the glass outer cover, the lower end opening of the sampling tube is inserted into the upper end straight tube part of the valve, and as the sampling tube is lighter in weight, the upper end opening of the inserted valve can be kept vertically stable, then the Pasteur tube is extruded to inject the eluent into the sampling tube, after the eluent is injected into the sampling tube, the valve switch is controlled to open, and the lower end outlet of the sampling tube is inserted into the upper end opening of the valve during elution, so that the sealing is kept; simultaneously, a vacuum pump is started to vacuumize, and eluting liquid can completely enter the lower glass screw sharp bottom scale tube within 5 seconds;
through setting up glass dustcoat, first backup pad, second backup pad and vacuum pump, in the preliminary treatment in-process that detects the ambient air aldehyde ketone compound, aim at glass screw pointed end scale pipe, control valve, sampling pipe and support and seal up, form the enclosure space, utilize the vacuum pump to vacuum, make enclosure space and external world have pressure differential, thereby make elution process go on automatically, can greatly reduce the amount of labour of the handheld operation of inspector, not only can improve detection efficiency, can also increase and reduce the poison risk that organic reagent volatilizees and produce.
Preferably, the side wall of the glass outer cover is communicated with a gas channel connecting pipe, the gas channel connecting pipe is connected with an external pressure gauge, and the pressure gauge is connected with the vacuum pump.
Preferably, the diameter of the inlet of the control valve is larger than that of the bottom end of the sampling tube, and the outlet of the control valve is aligned with the bottle mouth of the glass screw sharp-bottom scale tube corresponding to the lower part.
Preferably, a glass screw pointed end scale tube bottom plate is arranged in the glass outer cover, and the first support plate is arranged above the glass screw pointed end scale tube bottom plate in a parallel supporting mode.
Preferably, the bottom plate of the glass screw sharp-bottom scale tube is provided with a plurality of pits for accommodating the bottom of the glass screw sharp-bottom scale tube, and the first support plate is provided with a plurality of holes for clamping the glass screw sharp-bottom scale tube; the holes are in one-to-one correspondence with the pits, and the centers of the holes are aligned.
By adopting the technical scheme, as the glass screw pointed end scale tube is slender, the arrangement of the pits and the holes can ensure that the position of the glass screw pointed end scale tube is stable, and the unstable turnover of the gravity center is avoided.
Preferably, a sealing ring is arranged on the bottom surface of the second supporting plate, and the sealing ring and the edge of the glass outer cover below are clamped to form a closed space; the sealing ring is a silica gel sealing ring.
Compared with the prior art, the utility model has the beneficial effects that:
1. according to the aldehyde ketone compound monitoring pretreatment equipment in the ambient air, the glass screw pointed bottom scale tube, the control valve and the sampling tube are aligned and sealed to form the closed space, the vacuum pump is utilized to vacuumize the closed space, so that the pressure difference between the closed space and the outside is formed, the elution process is fast and automatic, the labor amount of a detector for holding, pushing and pressing the injector piston to press the eluent in the injector piston to pass through the sampling tube can be greatly reduced, the detection efficiency can be improved, and the toxic hazard risk generated by volatilization of an organic reagent can be increased.
2. According to the rapid automatic pretreatment device for monitoring aldehyde ketone compounds in the ambient air, disclosed by the utility model, after 5ml of eluent is added to the sampling tube at one time by utilizing the Pasteur tube, the vacuum pump is opened, the control valve on the second supporting plate is opened, so that automatic elution can be realized, the eluent in the sampling tube does not need to flow into the middle glass screw pointed bottom scale tube by simply relying on the action of gravity, elution of at least 12 samples can be realized within 5 seconds, multiple rows of sampling tubes can be arranged according to requirements, the elution speed is greatly improved, manual operation is not needed, and the environmental pollution risk caused by volatilization of the eluent can be basically avoided.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a rapid and automated pretreatment apparatus for monitoring aldehyde ketone compounds in ambient air according to the present utility model.
Fig. 2 is a schematic structural view showing the connection relationship among the first support plate, the second support plate, the glass housing and the glass screw tip bottom scale tube bottom plate.
FIG. 3 shows a schematic structural diagram of the connection relationship among a sampling tube, a control valve and a glass screw tip bottom scale tube.
FIG. 4 is a schematic diagram showing the decomposition of the present utility model for monitoring the use status of a rapid auto-pretreatment device for aldehyde ketone compounds in ambient air.
Reference numerals illustrate: 1. glass screw mouth sharp bottom scale tube; 2. a sampling tube; 3. a control valve; 4. a second support plate; 5. a glass screw mouth sharp bottom scale tube bottom plate; 6. a first support plate; 7. a glass cover; 8. a seal ring; 9. pit; 10. a hole; 11. a gas passage connection pipe; 12. a pressure gauge; 13. a vacuum pump; 14. pasteur pipe.
Detailed Description
The utility model is described in further detail below with reference to fig. 1-4.
The utility model discloses a rapid automatic pretreatment device for monitoring aldehyde ketone compounds in ambient air, which is used for aligning, supporting and sealing a glass screw sharp bottom scale tube 1, a control valve 3 and a sampling tube 2 in the pretreatment process of detecting aldehyde ketone compounds in ambient air to form a closed space, and vacuumizing by a vacuum pump 13 to ensure that the closed space has a pressure difference with the outside, so that the elution process is automatically carried out, the labor amount of handheld operation of detection personnel can be greatly reduced, the detection efficiency can be improved, and the toxic hazard risk generated by volatilization of an organic reagent can be increased.
Referring to fig. 1 and 2, a rapid automatic pretreatment device for monitoring aldehyde ketone compounds in ambient air comprises a glass outer cover 7, wherein a glass screw pointed end scale tube bottom plate 5 is placed in the glass outer cover 7, a first support plate 6 is parallelly supported above the glass screw pointed end scale tube bottom plate 5, a second support plate 4 is arranged above the glass outer cover 7, a sealing ring 8 is arranged on the bottom surface of the second support plate 4, the sealing ring 8 and the edge of the glass outer cover 7 below are clamped to form a closed space, and the sealing ring 8 is a silica gel sealing ring.
Referring to fig. 3 and 4, a plurality of control valves 3 are embedded on the second support plate 4, the diameter of an inlet of the control valve 3 after being opened is larger than that of the bottom end of the sampling tube 2, and an outlet of the control valve 3 is aligned with a bottleneck of the glass screw pointed bottom scale tube 1 corresponding to the lower part. The sampling tube 2 is a standard component of purchase, and the structural shape of the sampling tube 2 is shown in the national standard mentioned in the background art. The control valve 3 is a common commercial solid phase extraction small column accessory control valve (quark valve).
A plurality of pits 9 for accommodating the bottoms of the glass screw sharp-bottomed graduated tubes 1 are formed in the glass screw sharp-bottomed graduated tube bottom plate 5. The number of the pits 9 can be set according to actual needs to further improve the detection efficiency. By clamping the bottom of the glass screw pointed-bottom scale tube 1 in the pit 9, positioning can be facilitated, and the glass screw pointed-bottom scale tube bottom plate 5 is prevented from moving.
The glass screw tip end scale tube 1 is slender, and in order to avoid unstable turnover of the center of gravity, a plurality of holes 10 for clamping the glass screw tip end scale tube 1 are formed in the first support plate 6. The holes 10 are aligned with the corresponding pits 9 below to ensure the stable position of the glass screw sharp-bottomed graduated tube 1.
The side wall of the glass outer cover 7 is communicated with a gas channel connecting pipe 11, the gas channel connecting pipe 11 is connected with an external pressure gauge 12, the pressure gauge 12 is connected with a vacuum pump 13, and when the vacuum pump 13 is started, the pressure is regulated to enable micro negative pressure to be formed in the glass outer cover 7.
Working principle: when the glass spiral mouth sharp-bottomed graduated tube is used, the second supporting plate 4 is taken down, the glass spiral mouth sharp-bottomed graduated tube 1 is placed in the hole 10 on the first supporting plate 6, the bottom of the glass spiral mouth sharp-bottomed graduated tube 1 is clamped in the pit 9, and then the second supporting plate 4 is placed on the glass outer cover 7; the lower port of the sampling tube 2 is inserted into the straight tube part at the upper end of the valve, and the opening at the upper end of the inserted valve can be kept vertical and stable without being held by hands because the mass of the sampling tube 2 is lighter;
and then the Pasteur pipe 14 is used for injecting the eluent into the sampling pipe 2 in an aligned mode, after the eluent is injected into the sampling pipe 2, the control valve 3 is opened and closed, the vacuum pump 13 is simultaneously opened for vacuumizing, and the eluent can completely enter the lower glass screw pointed bottom scale pipe 1 within 5 seconds. The Pasteur tubing 14 is a purchased laboratory consumable for transferring the eluent.
Claims (6)
1. An automatic pretreatment device for monitoring aldehyde ketone compounds in ambient air, which is characterized in that: the glass cover (7) is internally provided with a first supporting plate (6) for supporting the glass screw sharp-bottomed graduated tube (1); a second supporting plate (4) for supporting the sampling tube (2) is arranged above the glass outer cover (7), and a closed space is formed between the glass outer cover (7) and the second supporting plate (4); a plurality of control valves (3) which are connected with the sampling tube (2) and the glass screw pointed bottom scale tube (1) are arranged on the second supporting plate (4); the side wall of the glass outer cover (7) is connected with an external vacuum pump (13) and is used for forming micro negative pressure in the glass outer cover (7).
2. An ambient air aldehyde ketone compound monitoring and rapid auto-pretreatment device according to claim 1, wherein: the side wall of the glass outer cover (7) is communicated with a gas channel connecting pipe (11), the gas channel connecting pipe (11) is connected with an external pressure gauge (12), and the pressure gauge (12) is connected with the vacuum pump (13).
3. An ambient air aldehyde ketone compound monitoring and rapid auto-pretreatment device according to claim 2, wherein: the diameter of the inlet of the control valve (3) is larger than that of the bottom end of the sampling tube (2), and the outlet of the control valve (3) is aligned with the bottle mouth of the glass screw pointed bottom scale tube (1) corresponding to the lower part.
4. A rapid automatic pretreatment device for monitoring aldehyde ketone compounds in ambient air according to claim 1 or 3, wherein: the glass outer cover (7) is internally provided with a glass screw pointed end scale tube bottom plate (5), and the first support plate (6) is arranged above the glass screw pointed end scale tube bottom plate (5) in a parallel supporting mode.
5. The rapid and automated pretreatment device for monitoring aldehyde ketone compounds in ambient air according to claim 4, wherein: a plurality of pits (9) are formed in the glass screw pointed bottom scale tube base plate (5), a plurality of holes (10) are formed in the first support plate (6), the holes (10) correspond to the pits (9) one by one, and the centers of the holes are aligned.
6. An ambient air aldehyde ketone compound monitoring and rapid auto-pretreatment device according to claim 1, wherein: the bottom surface of the second supporting plate (4) is provided with a sealing ring (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320810070.8U CN219810899U (en) | 2023-04-13 | 2023-04-13 | Automatic pretreatment device for monitoring aldehyde ketone compounds in ambient air |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320810070.8U CN219810899U (en) | 2023-04-13 | 2023-04-13 | Automatic pretreatment device for monitoring aldehyde ketone compounds in ambient air |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219810899U true CN219810899U (en) | 2023-10-10 |
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ID=88214108
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320810070.8U Active CN219810899U (en) | 2023-04-13 | 2023-04-13 | Automatic pretreatment device for monitoring aldehyde ketone compounds in ambient air |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219810899U (en) |
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2023
- 2023-04-13 CN CN202320810070.8U patent/CN219810899U/en active Active
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