Cadmium column reduction detection equipment for nitrate determination

Abstract

The utility model relates to the technical field of nitrate determination, and discloses cadmium column reduction detection equipment for nitrate determination, which comprises a working table, a sampling tube, a buffer solution hose, a peristaltic pump component arranged on the working table and a cadmium column component arranged on the working table, the lower end of the sample outlet pipe is provided with a movable colorimetric tube tray, the colorimetric tube tray is arranged on the bottom surface of the workbench, the peristaltic pump assembly comprises a pump shell, and the top of the pump shell is provided with a control screen. According to the utility model, the liquid flow rate is accurately controlled through the peristaltic pump assembly, manual operation errors are avoided, and the reliability of a detection result is improved; the design of the cadmium column assembly ensures the stability and perpendicularity of the cadmium column, and the sample outlet tube and the colorimetric tube tray are matched for use, so that the sample collection process is simplified, the operation steps are reduced, and the working efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to nitrate determination technical field, concretely is a kind of cadmium column reduction detection equipment for nitrate determination. BACKGROUND

[0002] Nitrate in water body is the most stable nitrogen compound in various forms of nitrogen compounds under aerobic environment, and is the final decomposition product of oxygen-containing organic matter by inorganic action. Nitrate pollutants in surface water mainly come from tannery wastewater, pickling wastewater, effluent from some biochemical treatment facilities and farmland drainage, etc., and nitrate pollutants in seawater mainly come from land-based pollution sources. Nitrate is one of the essential nutrients for the growth and reproduction of phytoplankton and organisms in lakes and seawater, and excessive nitrate can cause eutrophication of surface water and seawater, leading to lake water bloom or seawater red tide, which threatens the ecological balance of lakes and oceans. Therefore, it is of great significance to monitor nitrate in surface water and seawater.

[0003] There are various methods for determining nitrate, but the traditional methods have problems such as complex operation and long time consumption. The utility model realizes rapid and accurate determination of nitrate content by cadmium column reduction technology, effectively improves the detection efficiency and accuracy, and provides strong support for water environment protection. UTILITY MODEL CONTENT

[0004] The utility model aims to provide a kind of cadmium column reduction detection equipment for nitrate determination, solve the technical problems that traditional method has complex operation and long time consumption, reach the effect of rapid and accurate determination of nitrate content, improve the purpose of detection efficiency and accuracy.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a kind of cadmium column reduction detection equipment for nitrate determination, including workbench, sampling tube, buffer solution hose and the peristaltic pump assembly of being set on workbench, the cadmium column assembly of being set on workbench, the installation hole is equipped on the workbench, the sample outlet pipe is installed in this installation hole, the lower end of the sample outlet pipe is provided with movable colorimetric tube tray, and the colorimetric tube tray is arranged on the bottom surface of the workbench.

[0006] Preferably, the peristaltic pump assembly includes a pump housing, a control panel is provided on the top of the pump housing, the control panel can display detection data in real time, and the operator can monitor it conveniently, a driver is built-in the pump housing and electrically connected with the control panel, the pump shaft is connected with the driver, the pump wheel is installed on the end of the pump shaft, three rollers are uniformly distributed and installed on the pump wheel, the outer wall of the roller is extruded with a hose, one end of the hose is connected with the sampling tube and the buffer solution hose respectively, and the other end of the hose is connected with a bend pipe.

[0007] Preferably, the cadmium column assembly comprises a tripod base, the top of the tripod base is fixedly connected with a fixing frame, the outer wall of the fixing frame is fixedly sleeved with a fixing sleeve, and the fixing sleeve is integrally formed with a connecting arm plate.

[0008] Preferably, the front side of the connecting arm plate is movably connected with two asymmetrically distributed rubber clamping wheels, the bottom of the connecting arm plate is integrally provided with a clamping hoop, the clamping hoop is internally provided with a cadmium column, the cadmium column is fixed by adjusting bolts, the top end of the cadmium column penetrates through the rubber clamping wheel and extends upwards, the position of the cadmium column is stabilized by the friction force of the rubber clamping wheel, and the perpendicularity of the cadmium column is ensured.

[0009] Preferably, the top of the cadmium column is connected with the other end of the elbow pipe, the bottom of the cadmium column is provided with a switch valve, the switch valve controls the liquid flow, accurate detection is ensured, the cadmium column is filled with cadmium particles in a 10ml acid burette, and the filling length is 10cm.

[0010] Preferably, the upper end of the sample outlet pipe is located directly below the acid burette, so that the reduced liquid sample can be collected without leakage.

[0011] The utility model provides a kind of cadmium column reduction detection equipment for nitrate determination.It has the following beneficial effects:

[0012] (1), the utility model discloses a peristaltic pump assembly, which realizes accurate control of liquid flow rate, avoids human operation error, and improves the reliability of detection results;The design of the cadmium column assembly ensures the stability and perpendicularity of the cadmium column, and the cooperation of the sample outlet pipe and the colorimetric tube tray simplifies the sample collection process, reduces the operation steps, and improves the work efficiency.

[0013] (2), the utility model discloses an optimized structure layout, reasonable configuration of each component, effectively reduces equipment maintenance cost, prolongs equipment service life, reduces failure rate, further improves the stability and economy of the overall detection system, improves the detection capability of chemical analyzer, realizes the automation process of cadmium column reduction method detection, has simple operation, detection accuracy, and is especially suitable for detecting samples with low nitrate content in seawater and soil. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the overall structure perspective view of the utility model;

[0015] Figure 2 It is the overall structure front view schematic view of the utility model;

[0016] Figure 3 It is the peristaltic pump assembly view of the utility model;

[0017] Figure 4 It is the utility model Figure 3 A zoomed view.

[0018] In the figure: workbench 21, sampling tube 22, buffer solution hose 23, elbow 24, sample outlet tube 25, colorimetric tube tray 26, peristaltic pump assembly 3, cadmium column assembly 4, pump shaft 32, pump wheel 33, roller 34, hose 35, control screen 36, iron stand 41, fixing frame 42, fixing sleeve 43, connecting arm plate 44, rubber clamping wheel 45, clamping hoop 46, adjusting bolt 47, cadmium column 48, on-off valve 49. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0020] Examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as limiting the present application.

[0021] Based on the problems of the existing nitrate determination methods, such as complicated operation and long time consumption, the preferred embodiment of the cadmium column reduction detection equipment for nitrate determination provided by the present application comprises a workbench 21, a sampling tube 22, a buffer solution hose 23, a peristaltic pump assembly 3 arranged on the workbench 21, and a cadmium column assembly 4 arranged on the workbench 21. Figures 1-4 As shown in the figure: a cadmium column reduction detection equipment for nitrate determination, comprising a workbench 21, a sampling tube 22, a buffer solution hose 23, a peristaltic pump assembly 3 arranged on the workbench 21, and a cadmium column assembly 4 arranged on the workbench 21. The workbench 21 is provided with a mounting hole, and a sample outlet tube 25 is arranged in the mounting hole. The lower end of the sample outlet tube 25 is provided with a movable colorimetric tube tray 26, and the colorimetric tube tray 26 is arranged on the bottom surface of the workbench 21.

[0022] The peristaltic pump assembly 3 comprises a pump shell 31, and the top of the pump shell 31 is provided with a control screen 36. The control screen 36 can display detection data in real time, so as to facilitate the operator to monitor. The pump shell 31 is built-in with a driver electrically connected with the control screen 36. The driver is connected with a pump shaft 32, and the end of the pump shaft 32 is provided with a pump wheel 33. Three rollers 34 are uniformly arranged on the pump wheel 33. The outer wall of the roller 34 is extruded with a hose 35. One end of the hose 35 is connected with the sampling tube 22 and the buffer solution hose 23 respectively, and the other end of the hose 35 is connected with an elbow 24.

[0023] The cadmium column assembly 4 comprises an iron stand 41, the top of the iron stand 41 is fixedly connected with a fixing frame 42, the outer wall of the fixing frame 42 is fixedly sleeved with a fixing sleeve 43, and the fixing sleeve 43 is integrally formed with a connecting arm plate 44;

[0024] The front side of the connecting arm plate 44 is movably connected with two asymmetrically distributed rubber clamping wheels 45, the bottom of the connecting arm plate 44 is integrally installed with a clamping hoop 46, the clamping hoop 46 is internally provided with a cadmium column 48, the cadmium column 48 is fixed through an adjusting bolt 47, the top end of the cadmium column 48 penetrates through the rubber clamping wheel 45 and extends upwards, the position of the cadmium column 48 is stabilized through the friction force of the rubber clamping wheel 45, and the verticality of the cadmium column 48 is ensured; the top of the cadmium column 48 is connected with the other end of the elbow pipe 24, the bottom of the cadmium column 48 is provided with a switch valve 49, the switch valve 49 controls the liquid flow, accurate detection is ensured, the cadmium column 48 is filled with cadmium particles in a 10ml acid burette, and the filling length is 10cm;

[0025] The upper end of the sample outlet pipe 25 is located directly below the acid burette, so that the reduced liquid sample can be collected, and leakage is avoided.

[0026] In use, the sampling pipe 22 is used for water sampling, the buffer solution hose 23 is used for providing an ammonium chloride buffer solution, the peristaltic pump provides a quantitative solution forward driving force, the cadmium column 48 quantitatively reduces nitrate in the water sample into nitrite, and the sample outlet pipe 25 provides a sample outlet channel.

[0027] Specific use process is: before the experiment, the ammonium chloride buffer solution is configured according to the standard specification, the position of the cadmium column 48 is stabilized through the friction force of the rubber clamping wheel 45, the verticality of the cadmium column 48 is ensured, the cadmium column 48 is fixed through the adjusting bolt 47, the driver is started, the driver drives the pump shaft 32, the pump shaft 32 drives the pump wheel 33, the pump wheel 33 drives the roller 34, the roller 34 extrudes the hose 35, the cross section of the pipeline is reduced and closed, the liquid is extruded, so that the liquid in the pipeline forms a peristaltic wave, the peristaltic wave starts to move from the feeding direction to the discharging direction, and every time the extrusion occurs, the mixed liquid in the sampling pipe 22 and the buffer solution hose 23 is sucked into the pipeline, and then is transported along the pipeline to the elbow pipe 24 along with the peristaltic wave, and then enters the cadmium column 38 for activation; since the rotation speed of the peristaltic pump is stable, the mixed liquid of the sample and the ammonium chloride buffer solution can be quantitatively provided, the flow rate of the solution from the sampling pipe 22 to the sample outlet pipe 25 is constant, the contact time of the mixed solution and the cadmium column is basically consistent, and the precision and accuracy of the experiment are improved; after the experiment is completed, the data is recorded through the control screen 36, and subsequent analysis is facilitated. The colorimetric tube tray 26 is movably designed, the colorimetric tube is convenient to take and place, and the operation convenience is improved. The whole system structure is compact, the operation is simple, and the reliability and consistency of the experimental results are effectively guaranteed.

[0028] Finally, it should be noted that: the above is only the preferred embodiment of the utility model, and is not used to limit the utility model, although the utility model is described in detail with reference to the foregoing embodiments, for the person skilled in the art, it still can modify the technical scheme recorded in the foregoing each embodiment, or make equivalent replacement to part of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A cadmium column reduction detection device for nitrate determination, comprising a workbench (21), a sampling tube (22), a buffer solution hose (23), a peristaltic pump assembly (3) arranged on the workbench (21), and a cadmium column assembly (4) arranged on the workbench (21), characterized in that: The workbench (21) is provided with a mounting hole, and a sample outlet pipe (25) is mounted in the mounting hole.

2. The cadmium column reduction detection apparatus for nitrate determination according to claim 1, characterized by: The peristaltic pump assembly (3) comprises a pump shell (31), a control screen (36) is arranged on the top of the pump shell (31), the control screen (36) can display detection data in real time, and an operator can monitor the control screen (36), the pump shell (31) is provided with a driver which is electrically connected with the control screen (36), the driver is connected with a pump shaft (32), an end of the pump shaft (32) is provided with a pump wheel (33), three rollers (34) are uniformly arranged on the pump wheel (33), and the outer wall of the roller (34) is extruded by a hose (35), one end of the hose (35) is connected with the sampling pipe (22) and the buffer solution hose (23), and the other end of the hose (35) is connected with the elbow pipe (24).

3. The cadmium column reduction detection apparatus for nitrate determination according to claim 1, characterized by: The cadmium column assembly (4) comprises an iron stand base (41), the top of the iron stand base (41) is fixedly connected with a fixing frame (42), the outer wall of the fixing frame (42) is fixedly provided with a fixing sleeve (43), and the fixing sleeve (43) is integrally formed with a connecting arm plate (44).

4. A cadmium column reduction detection apparatus for the determination of nitrates according to claim 3, characterized in that: The front side of the connecting arm plate (44) is movably connected with two asymmetrically distributed rubber clamping wheels (45), the bottom of the connecting arm plate (44) is integrally provided with a clamping hoop (46), the clamping hoop (46) is provided with a cadmium column (48), the cadmium column (48) is fixed by adjusting the bolt (47), the top end of the cadmium column (48) penetrates through the rubber clamping wheel (45) and extends upwards, the position of the cadmium column (48) is stabilized by the friction force of the rubber clamping wheel (45), and the perpendicularity of the cadmium column (48) is ensured.

5. A cadmium column reduction detection apparatus for the determination of nitrates according to claim 4, characterized in that: The top of the cadmium column (48) is connected with the other end of the elbow pipe (24), the bottom of the cadmium column (48) is provided with a switch valve (49), the switch valve (49) controls the liquid flow, accurate detection is ensured, and the cadmium column (48) is filled with cadmium particles in a 10ml acid burette, and the filling length is 10cm.

6. The cadmium column reduction detection apparatus for nitrate determination according to claim 1, characterized by: The upper end of the sample outlet pipe (25) is located directly below the acid burette, so as to collect the reduced liquid sample and ensure no leakage.

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