A device for rapid detection of sulfur dioxide residue in asparagus
By designing a rapid detection device that includes a detection platform, frame, pure water adder, and hydrochloric acid adder, the complexity and time-consuming nature of detecting sulfur dioxide residue in Chinese medicinal materials have been solved, achieving rapid and accurate detection results, and making it suitable for outdoor use.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 玉林市食品药品检验检测中心(玉林市药品不良反应监测中心)
- Filing Date
- 2025-07-29
- Publication Date
- 2026-06-19
AI Technical Summary
Existing methods for detecting sulfur dioxide residues in Chinese medicinal materials suffer from problems such as high requirements for airtightness, long detection time, complex operation, and unsuitability for outdoor testing. In particular, existing methods cannot meet the needs for rapid and convenient detection for Chinese medicinal materials such as asparagus that require mold and decay prevention.
A rapid detection device was designed, comprising a detection platform, a frame, a pure water additive, an active metal additive, and a hydrochloric acid additive. It achieves rapid detection of sulfur dioxide residue through simple chemical reactions and color comparison. The device has a simple structure, is easy to disassemble and assemble, and is suitable for outdoor use.
It enables rapid and accurate detection of sulfur dioxide residue, is easy to operate, suitable for outdoor field use, reduces detection time and complexity, and is applicable to the detection needs of various groups.
Smart Images
Figure CN224383129U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of asparagus processing technology, specifically to a rapid detection device for sulfur dioxide residue in asparagus. Background Technology
[0002] Guangxi has numerous mountains and a relatively suitable climate, making it ideal for the cultivation of traditional Chinese medicinal herbs. Asparagus prefers to grow in shady and damp mountain forests, grassy slopes, and shrubbery in hilly areas. It thrives in warm and humid environments and is not particular about soil requirements, making it a commonly promoted crop in Guangxi.
[0003] After harvesting, asparagus is typically fumigated with sulfur to prevent mold, decay, and drying. However, excessive sulfur dioxide residue can severely irritate the human digestive system and combine with thiamines in the blood, leading to lesions in organs such as the brain, liver, and spleen, posing a certain health hazard to consumers. Currently, the 2020 edition of the Chinese Pharmacopoeia includes three main methods for detecting sulfur dioxide in Chinese medicinal materials: acid-base titration, gas chromatography, and ion chromatography. Among these, acid-base titration is the most common, but this method requires a high degree of airtightness in the detection device. Poor sealing of the container can lead to leakage of distilled sulfur dioxide from the product being tested, resulting in lower test results. Furthermore, this method requires distillation of the product being tested, thus resulting in a long overall testing time and low efficiency. To address this issue, patent CN201510200574.8, "A Device and Method for Rapid Quantitative Determination of Sulfur Dioxide Residue in Traditional Chinese Medicine," describes a method that features simple instrumentation and operation, accurate detection results, and effective detection of sulfur dioxide in traditional Chinese medicine. However, this detection system requires a fluorescence reaction and utilizes a spectrophotometer and an automated detector in tandem. While the detection structure is accurate, the overall operation is complex, making the system unsuitable for outdoor testing, especially for sampling inspections in outdoor warehouses. Utility Model Content
[0004] To overcome one of the shortcomings of the existing technology, the purpose of this utility model is to provide a rapid detection device for sulfur dioxide residue in aspartic acid. This rapid detection device for sulfur dioxide residue in aspartic acid has a simple structure and is suitable for outdoor field detection.
[0005] To solve the above problems, the technical solution adopted by this utility model is as follows:
[0006] A rapid detection device for sulfur dioxide residue in aspartic acid includes a detection platform and a frame detachably mounted on the detection platform. The frame is equipped with a pure water additive, an active metal additive, and a hydrochloric acid additive. A reaction vessel is mounted on the detection platform, and an electric heater for heating the reaction vessel is also mounted on the detection platform. A sealing plug is installed at the opening of the reaction vessel. The output ends of the pure water additive, active metal additive, and hydrochloric acid additive all pass through the sealing plug and are connected to the reaction vessel. A detection box is mounted on the frame and connected to the sealing plug via an exhaust pipe. The detection box has an insertion port for inserting test strips.
[0007] Furthermore, the pure water additive includes a first container, a first connecting pipe, and a first valve body. The first container is fixed on the frame and located above the reaction vessel. The first container is connected to the reaction vessel through the first connecting pipe and a sealing plug. The first valve body is located on the first connecting pipe. An air inlet is provided on the top of the first container.
[0008] Furthermore, the active metal additive includes a storage hopper, a conveying pipe, and a manually rotary feeding valve. The storage hopper is fixed on the frame and located above the reaction vessel. The lower end of the storage hopper is connected to the reaction vessel through the conveying pipe and a sealing plug. The manually rotary feeding valve is installed on the conveying pipe.
[0009] Furthermore, the hydrochloric acid additive includes a second container, a second connecting pipe, and a peristaltic pump. The second container is fixed on the frame and connected to the reaction vessel through the second connecting pipe and a sealing plug. The peristaltic pump is mounted on the second connecting pipe.
[0010] Furthermore, the frame is provided with several fixing positions, and the pure water adder, active metal adder and hydrochloric acid adder are all installed on the fixing positions, and each fixing position is provided with a locking structure.
[0011] Furthermore, the sealing plug is fitted with several connecting pipes, and the output ends of the pure water additive, the active metal additive, and the hydrochloric acid additive are respectively connected to the several connecting pipes.
[0012] Furthermore, a color comparison area is provided on the outer wall of the detection box.
[0013] Furthermore, the back of the testing station is provided with a mounting position, into which the frame can be inserted.
[0014] Furthermore, it also includes a box body and a box cover. The box body is provided with several partitions, which divide the box body into several storage compartments. The storage compartments can hold the reaction vessel, pure water additive, active metal additive, and hydrochloric acid additive. The outer periphery of the detection platform is provided with several connectors. The inner sidewall of the opening of the box body is provided with several locking structures. The outer periphery of the detection platform can be locked into the corresponding locking structures by several limiting members. The back of the detection platform abuts against the top of the partition.
[0015] Furthermore, the outer wall of the box is provided with a latch and a handle, and the latch can lock the box and the lid together.
[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0017] This invention relates to a rapid detection device for sulfur dioxide residue in asparagus. The device features a detachable and assembleable detection platform and frame, suitable for on-site assembly. The frame, detection box, purified water adder, active metal adder, and hydrochloric acid adder are also detachable for easy storage and portability. During the detection process, only the target medicinal material, reaction reagents, and test strips need to be added to the reaction container. The required detection solvents and reaction conditions are minimally restricted, eliminating the need for titration or instrumental interpretation. The device is simple to operate and easy to carry outdoors. Furthermore, the short reaction time allows for rapid and accurate determination of sulfur dioxide residue in asparagus, making it suitable for determining sulfur dioxide residue limits for various population groups.
[0018] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model. Figure 1 ;
[0020] Figure 2 This is a schematic diagram of the structure of an embodiment of the present utility model. Figure 2 ;
[0021] Figure 3 This is a cross-sectional view of another embodiment of the present invention;
[0022] Figure 4 yes Figure 3 A magnified view of a portion of point A in the middle.
[0023] Explanation of icon numbers: Detailed Implementation
[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.
[0025] Reference Figures 1 to 2 The device shown is a rapid detection device for sulfur dioxide residue in aspartic acid, comprising a detection platform 10 and a frame 20 detachably mounted on the detection platform 10. The frame 20 is equipped with a pure water additive 30, an active metal additive 40, and a hydrochloric acid additive 50. A reaction vessel 60 is mounted on the detection platform 10, and an electric heater for heating the reaction vessel 60 is also mounted on the detection platform 10. A sealing plug 70 is provided at the opening of the reaction vessel 60. The output ends of the pure water additive 30, the active metal additive 40, and the hydrochloric acid additive 50 all pass through the sealing plug 70 and are connected to the reaction vessel 60. A detection box 80 is mounted on the frame 20, and the detection box 80 is connected to the sealing plug 70 via an exhaust pipe. The detection box 80 has an insertion port 81 for inserting test strips.
[0026] In this application, the frame 20 is actually a single plate structure, vertically positioned to accommodate the testing platform 10. This facilitates the placement of the pure water additive 30, the active metal additive 40, and the hydrochloric acid additive 50. In this application, the test paper is zinc acetate test paper. Furthermore, the active metal added to the active metal additive 40 can be zinc powder, aluminum powder, magnesium powder, etc. The overall testing principle is as follows: the asparagus to be tested is placed in the reaction container 60, and then a suitable amount of pure water is added to the pure water additive 30 for a preset soaking time at a temperature of 40-100℃. The SO2 contained on the surface of the asparagus partially dissolves in the water. Simultaneously, the cell walls inside the asparagus absorb water and swell, which facilitates the release of sulfur dioxide bound to the medicinal components after subsequent sulfur fumigation. After a suitable soaking time, Zn powder and HCl solution are added. At this point, the SO2 contained inside the asparagus reacts with the HCl solution to produce ZnCl2 and H2. ZnCl2 dissolves in water. Simultaneously, in a closed environment, H2 and SO2 partially dissolve in water to form sulfurous acid (H2SO3). In an acidic environment, H2 can reduce H2SO3 to elemental sulfur (partial reduction) or H2S (complete reduction). In this application, a complete reduction reaction occurs, thus only H2S gas is generated. The H2S gas reacts with the zinc acetate component in the moistened test paper, resulting in a color reaction. The degree of color change can then be used to determine the H2S content. By pre-calculating the correspondence between the SO2 content and different shades of color on the test paper, the SO2 content in aspartic acid can be quickly determined. The electric heater is essentially a heating wire structure, mounted and fixed on a protective housing, which is then installed on the detection stage 10. For convenient power supply, a portable power supply can be provided on the detection stage 10 to power the electric heater.
[0027] This rapid detection device for sulfur dioxide residue in asparagus is designed with a relatively detachable and assembleable detection platform 10 and frame 20, suitable for on-site assembly. The frame 20, detection box 80, pure water adder 30, active metal adder 40, and hydrochloric acid adder 50 are also detachable for easy storage and portability. During the detection process, only the medicinal material to be tested, the reaction reagent, and the test strip need to be added to the reaction container 60. The required detection solvent and reaction conditions are minimally restricted, eliminating the need for titration or instrumental interpretation. The device is simple to operate and easy to carry outdoors. Furthermore, the short reaction time allows for rapid and accurate determination of the amount of sulfur dioxide residue inside asparagus, making it suitable for determining sulfur dioxide residue limits for various population groups.
[0028] See Figure 1 and Figure 2To better supply purified water, in one embodiment of this application, the purified water dispenser 30 includes a first container 31, a first connecting pipe 32, and a first valve body 33. The first container 31 is fixed on the frame 20 and located above the reaction vessel 60. The first container 31 is connected to the reaction vessel 60 through the first connecting pipe 32 and a sealing plug 70. The first valve body 33 is located on the first connecting pipe 32, and an air inlet 34 is provided on the top of the first container 31. The first valve body 33 can be a conventional on / off valve, primarily controlling the supply of purified water. To facilitate control of the water supply, the first container 31 is made of transparent material and has several graduations on its surface for easy monitoring. In practice, the purified water in the first container 31 automatically flows into the reaction vessel 60. Of course, in some embodiments, the first valve body 33 can also be an electromagnetic metering valve.
[0029] Similarly, in one embodiment of this application, for adding zinc powder, the active metal additive 40 includes a storage hopper 41, a conveying pipe 42, and a manually operated rotary feed valve 43. The storage hopper 41 is fixed on the frame 20 and located above the reaction vessel 60. The lower end of the storage hopper 41 is connected to the reaction vessel 60 through the conveying pipe 42 and a sealing plug 70. The manually operated rotary feed valve 43 is disposed on the conveying pipe 42. The manually operated rotary feed valve 43 has a conventional structure; by rotating the valve core, it achieves a feeding effect similar to a conventional auger. In fact, the manually operated rotary feed valve 43 is a simplified version of an auger feeding device.
[0030] See Figures 1 to 2 In one embodiment of this application, to facilitate control of the hydrochloric acid solution feed rate, the hydrochloric acid additive 50 includes a second container 51, a second connecting pipe 52, and a peristaltic pump 53. The second container 51 is fixed to the frame 20, and the second container 51 is connected to the reaction vessel 60 through the second connecting pipe 52 and a sealing plug 70. The peristaltic pump 53 is mounted on the second connecting pipe 52. The peristaltic pump 53 can also be replaced by a switch valve, similar to the design in the pure water additive 30 described above; in fact, the two are interchangeable. In this application, the hydrochloric acid solution is a corrosive solution, therefore, a peristaltic pump 53 is designed for quantitative feeding.
[0031] Furthermore, in the above embodiments, to better connect the pure water additive 30, the active metal additive 40, and the hydrochloric acid additive 50, a plurality of connecting pipes 71 are inserted into the sealing plug 70. The output ends of the pure water additive 30, the active metal additive 40, and the hydrochloric acid additive 50 are respectively connected to the plurality of connecting pipes 71. Among them, the connecting pipes 71 are connected to the second connecting pipe 52, the first connecting pipe 32, and the delivery pipe 42, and the connection of the above three is a plug-in connection method.
[0032] See Figure 1 and Figure 2 In one embodiment of this application, to facilitate the fixing of the pure water adder 30, the active metal adder 40, and the hydrochloric acid adder 50, the frame 20 is provided with several fixing positions 21. The pure water adder 30, the active metal adder 40, and the hydrochloric acid adder 50 are all installed on the fixing positions 21, and each fixing position 21 is provided with a locking and fixing structure 22. In practice, the locking and fixing structure 22 can be one or more pairs of clamping blocks, or multiple adjustable ring structures. This is set according to actual needs. In this application, to fix the reaction vessel 60, the detection platform 10 is provided with a dedicated fixing position, such as a recessed area, for fixing the reaction vessel 60. In this application, the reaction vessel 60 can be a glass bottle or a conical flask.
[0033] To facilitate staff in quickly determining the sulfur dioxide content based on the color change of the test strip, a color comparison area 82 is provided on the outer wall of the detection box 80. In fact, different color comparison areas 82 are marked with corresponding sulfur dioxide content range values, which makes it easy to identify.
[0034] See Figure 1 and Figure 2 In one embodiment of this application, for ease of later storage, the back of the testing table 10 is provided with a mounting position 11, and the frame 20 can be inserted into the mounting position 11. This design makes it easier for staff to assemble and disassemble the testing table 10 using the frame 20.
[0035] See Figure 3 and Figure 4In another embodiment of this application, for ease of carrying and storage, the application further includes a box body 90 and a box cover 91. The box body 90 has several partitions 92 inside, dividing the box body 90 into several storage compartments 93. These storage compartments 93 can hold the reaction vessel 60, the pure water additive 30, the active metal additive 40, and the hydrochloric acid additive 50. The outer periphery of the testing platform 10 is provided with several connectors, and the inner sidewall of the opening of the box body 90 is provided with several locking structures 94. The outer periphery of the testing platform 10 can be engaged into the corresponding locking structures 94 by several limiting members 12. The back of the testing platform 10 abuts against the top of the partitions 92. The box body 90 and the box cover 91 can be interlocked. In actual testing, the box body 90 and the box cover 91 can be opened 90° relative to each other, facilitating the direct mounting of the frame 20 onto the box cover 91 and adapting to the opening and closing action of the box cover 91. In practice, the partition 92 can be disassembled as needed, facilitating adjustments later based on actual requirements. The locking structure 94 is actually a notch structure, and the limiting component 12 is actually a protrusion structure; the cooperation of these two structures fixes the testing platform 10 to the opening of the housing 90. The partition 92 supports the back of the testing platform 10, preventing it from collapsing and facilitating operation. It should be noted that a battery can also be stored in the storage compartment 93, providing power to the aforementioned electrical equipment.
[0036] In the above embodiments, in order to facilitate the relative locking of the case body 90 and the case lid 91 and to prevent the contents from falling out during carrying, the outer wall of the case body 90 is provided with a buckle 95 and a handle 96. The buckle 95 can lock the case body 90 and the case lid 91 relative to each other.
[0037] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.
Claims
1. A device for rapid detection of sulfur dioxide residue in asparagus, characterized in that, The device includes a testing platform (10) and a frame (20) detachably mounted on the testing platform (10). The frame (20) is equipped with a pure water additive (30), an active metal additive (40), and a hydrochloric acid additive (50). The testing platform (10) is equipped with a reaction vessel (60) and an electric heater for heating the reaction vessel (60). The opening of the reaction vessel (60) is equipped with a sealing plug (70). The output ends of the pure water additive (30), the active metal additive (40), and the hydrochloric acid additive (50) are all connected to the reaction vessel (60) through the sealing plug (70). The frame (20) is equipped with a testing box (80), which is connected to the sealing plug (70) through an exhaust pipe. The testing box (80) is equipped with an insertion port (81) for inserting test strips.
2. The device for rapid detection of sulfur dioxide residue in asparagus according to claim 1, characterized in that: The pure water additive (30) includes a first container (31), a first connecting pipe (32) and a first valve body (33). The first container (31) is fixed on the frame (20) and located above the reaction container (60). The first container (31) is connected to the reaction container (60) through the first connecting pipe (32) and the sealing plug (70). The first valve body (33) is located on the first connecting pipe (32). An air inlet (34) is provided on the top of the first container (31).
3. The device for rapid detection of sulfur dioxide residue in asparagus according to claim 1, characterized in that: The active metal additive (40) includes a storage hopper (41), a conveying pipe (42), and a manual rotary feed valve (43). The storage hopper (41) is fixed on the frame (20) and located above the reaction vessel (60). The lower end of the storage hopper (41) is connected to the reaction vessel (60) through the conveying pipe (42) and through the sealing plug (70). The manual rotary feed valve (43) is installed on the conveying pipe (42).
4. The device for rapid detection of sulfur dioxide residue in asparagus according to claim 1, characterized in that: The hydrochloric acid additive (50) includes a second container (51), a second connecting pipe (52), and a peristaltic pump (53). The second container (51) is fixed on the frame (20). The second container (51) is connected to the reaction vessel (60) through the second connecting pipe (52) and the sealing plug (70). The peristaltic pump (53) is mounted on the second connecting pipe (52).
5. The device for rapid detection of sulfur dioxide residue in asparagus according to claim 1, characterized in that: The frame (20) is provided with several fixing positions (21), and the pure water additive (30), active metal additive (40) and hydrochloric acid additive (50) are all installed on the fixing positions (21). Each fixing position (21) is provided with a locking structure (22).
6. The device for rapid detection of sulfur dioxide residue in asparagus according to claim 1, characterized in that: The sealing plug (70) is fitted with several connecting pipes (71), and the output ends of the pure water additive (30), the active metal additive (40) and the hydrochloric acid additive (50) are respectively connected to the several connecting pipes (71).
7. The device for rapid detection of sulfur dioxide residue in asparagus according to any one of claims 1-6, characterized in that: A color comparison area (82) is provided on the outer wall of the detection box (80).
8. The device for rapid detection of sulfur dioxide residue in asparagus according to any one of claims 1-6, characterized in that: The back of the testing station (10) is provided with a mounting position (11), and the frame (20) can be inserted into the mounting position (11).
9. The device for rapid detection of sulfur dioxide residue in asparagus according to any one of claims 1-6, characterized in that: It also includes a box body (90) and a box cover (91). The box body (90) is provided with several partitions (92). The partitions (92) divide the box body (90) into several storage compartments (93). The storage compartments (93) can hold the reaction vessel (60), the pure water additive (30), the active metal additive (40), and the hydrochloric acid additive (50). The outer periphery of the detection platform (10) is provided with several connectors. The inner sidewall of the opening of the box body (90) is provided with several locking structures (94). The outer periphery of the detection platform (10) can be locked into the corresponding locking structure (94) by several limiting members (12). The back of the detection platform (10) abuts against the top of the partition (92).
10. The device for rapid detection of sulfur dioxide residue in asparagus according to claim 9, characterized in that: The outer wall of the box (90) is provided with a buckle (95) and a handle (96), and the buckle (95) can lock the box (90) and the lid (91) respectively.