CN216870449U

CN216870449U - Ion analyzer for detecting fluoride in waste water based on ion selective electrode method

Info

Publication number: CN216870449U
Application number: CN202123236681.6U
Authority: CN
Inventors: 缪江成; 周璇; 赵震宇; 缪倩媛
Original assignee: Jiangsu Cheung Kei Environmental Monitoring Co ltd
Current assignee: Jiangsu Cheung Kei Environmental Monitoring Co ltd
Priority date: 2021-12-22
Filing date: 2021-12-22
Publication date: 2022-07-01
Anticipated expiration: 2031-12-22

Abstract

The utility model discloses an ion analyzer for detecting wastewater fluoride based on an ion selective electrode method, which comprises an ion analyzer body, an electromagnetic stirrer matched with the ion analyzer body, and a transparent plastic beaker matched with the electromagnetic stirrer, wherein the outer wall of the plastic beaker is fixedly provided with a label paste for prompting the distance of the bottom of an electrode so as to avoid collision of the electrode in the stirring process of a stirrer. The outer wall of the plastic beaker is provided with the identification sticker, and the height of the identification sticker is arranged above a stirring movement area of the magnetic stirrer, so that the identification sticker can be used for prompting the distance between the electrode and the bottom of the beaker to avoid the effect of collision of the electrode in the stirring process of the stirrer. And be equipped with two constant temperature water-bath respectively, can guarantee the constant temperature of inlet liquid temperature to can adjust the inlet liquid temperature of needs very fast, avoid the influence of water sample temperature to the accuracy of ion analyzer test.

Description

Ion analyzer for detecting fluoride in waste water based on ion selective electrode method

Technical Field

The utility model relates to an ion analyzer for detecting wastewater fluoride based on an ion selective electrode method.

Background

The ion selective electrode is an electrode having a sensitive membrane and selectively responding to ions or molecular substances, and an analysis method using such an electrode belongs to potentiometry in electrochemical analysis, and is abbreviated as ISE. Ion selective electrodes are a class of chemical sensors whose potential is linear with respect to the logarithm of the activity of a given ion in solution. Its main application relies on the Nernst equation. The ion selective electrode method is convenient and rapid to operate, does not damage a test solution system, and is also suitable for samples which are not suitable for being analyzed by other methods, such as colored or turbid samples and the like. The instrument is simple and portable. The method is easier to be used for flow monitoring and automatic detection. The electrode directly responds to the ion activity, not the concentration, so that the electrode is more suitable for biology, medicine and chemistry, and especially the development of a micro-electronic sample technology, so that the intracellular detection is possible.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects in the prior art and provide an ion analyzer for detecting fluoride in wastewater based on an ion selective electrode method. And be equipped with two constant temperature water-bath respectively, can guarantee the constant temperature of inlet liquid temperature to can adjust the inlet liquid temperature of needs very fast, avoid the influence of water sample temperature to the accuracy of ion analyzer test.

In order to achieve the purpose, the technical scheme of the utility model is to design an ion analyzer for detecting fluoride in wastewater based on an ion selective electrode method, which comprises an ion analyzer body, an electromagnetic stirrer matched with the ion analyzer body, and a transparent plastic beaker matched with the electromagnetic stirrer, wherein the outer wall of the plastic beaker is fixedly provided with a label used for prompting the distance of the bottom of an electrode to avoid collision with the electrode in the stirring process of a stirrer; the three-channel peristaltic pump is connected with the plastic beaker, a liquid inlet pipe of the three-channel peristaltic pump is connected with a test solution bottle or a standard solution bottle, a deionized water bottle, a neutralization solution bottle and a total ion intensity adjusting buffer solution bottle through an intermittent liquid inlet valve, a first constant temperature water bath pot is arranged at the test solution bottle or the standard solution bottle, the deionized water bottle, the neutralization solution bottle and the total ion intensity adjusting buffer solution bottle, and a second constant temperature water bath pot is arranged in the middle of a liquid outlet pipe of the three-channel peristaltic pump. The outer wall of the plastic beaker is provided with an identification sticker, and the height of the identification sticker is arranged above a moving area stirred by the magnetic stirrer, so that the identification sticker can be used for prompting the distance between the electrode and the bottom of the beaker to avoid the effect of collision of the electrode in the stirring process of the stirrer. And be equipped with two constant temperature water-bath respectively, can guarantee the constant temperature of inlet liquid temperature to can adjust the inlet liquid temperature of needs very fast, avoid the influence of water sample temperature to the accuracy of ion analyzer test.

The further technical proposal is that a stirrer is matched with the electromagnetic stirrer, and the outer surface of the stirrer is coated with a red surface layer. The red outer layer coated outside the stirrer can play a role in prompting the area (or height) where the stirrer is located after the stirrer is placed in the beaker, and can prompt an operator to avoid the bottom of the electrode from colliding with the stirrer when the electrode support is operated by matching with the transparent plastic beaker.

The further technical scheme is that the set temperature of the first constant-temperature water bath is greater than or equal to that of the second constant-temperature water bath. Considering that the liquid pumped out of the test solution bottle or the standard liquid bottle, the deionized water bottle, the neutralization liquid bottle or the total ion intensity adjusting buffer liquid bottle has certain temperature exchange in the way, the setting temperature of the first constant temperature water bath kettle can be higher than that of the second constant temperature water bath kettle, so that a better heat preservation effect can be achieved, the temperature of a required water sample can be guaranteed when the liquid flows, the situation that the liquid is continuously fed after the constant temperature water bath kettle heats the water sample at the front part of the liquid inlet end to the required temperature after a pump valve is started in the prior art is avoided, and the continuity of the liquid feeding can be guaranteed after the setting.

The further technical scheme is that an adjustable electrode support is connected with the ion analyzer body, and a fluorine electrode and a calomel electrode are connected to the adjustable electrode support. A fluorine ion selective electrode, wherein the fluorine electrode (selective ion sensitive electrode) and a calomel electrode/or a silver electrode (namely a reference electrode) form a measuring chemical battery; the adjustable electrode support is the prior art and is not described in detail.

The device has the further technical scheme that a liquid adding pipe is integrally arranged at the upper middle part of the calomel electrode, the end part of the liquid adding pipe is a liquid adding opening, a protective cap is arranged at the liquid adding opening, a ceramic core is arranged at the lower end of the calomel electrode, and an electrode cap is sleeved at the lower end of the calomel electrode; and the calomel electrode is provided with an identification sticker for prompting an operator to take down the protective cap and the electrode cap before testing. In actual operation, the operator forgets to take off the protective cap and the electrode cap occasionally, so that the measuring result is influenced by the diffusion potential, the operator can be prompted by the arrangement of the identification sticker, and the accuracy of operation is ensured. The operation process is as follows: pumping a proper amount of deionized water into a 50 ml plastic beaker through a peristaltic pump, and pumping 0.1 to 0.2ml of total ionic strength adjusting buffer solution; putting the electrode into a stirrer, starting the stirrer, cleaning the fluorine electrode until a blank value when leaving a factory is reached, wherein the electrode has the best performance, paying attention to check that no bubbles are attached to the outside of the electrode film so as to avoid interference of reading, when taking and placing the beaker, firstly raising the electrode and then taking and placing the beaker so as to avoid damaging the electrode, the bottom of the electrode needs to have a certain distance from the bottom of the beaker so as to avoid collision with the electrode in the stirring process of the stirrer, repeatedly measuring the electrode potential value twice to be close to the time, using a standard sample of standard solution to test and read the balance potential to be the electrode blank potential, pumping 40 microliter of fluorine standard solution per milliliter into the beaker, stirring for three minutes and stopping for one minute, reading and recording the balance potential value, continuously pumping 40 microliter of fluorine standard solution 6 times by the same method, respectively measuring the balance potential value and recording each numerical value, taking out the electrode, cleaning by deionized water, wiping by using filter paper, inserting into deionized water of which is used for adjusting the total ion strength, cleaning to a blank potential value, transferring a 25.00-milli-ground water sample into a 50-milliliter volumetric flask by a dry and clean pipette, adding 10 milliliters of total ionic strength adjusting buffer solution, carrying out volume metering by deionized water, shaking up, transferring all samples into a dry 50-milliliter plastic beaker, sucking dry an electrode by using filter paper, inserting the electrode into a test solution, stirring for three minutes and stopping for one minute, reading the equilibrium potential E1, adding 100 microliters of each milli-ground fluorine standard solution into the water sample with the measured potential E1, stirring for three minutes and stopping for one minute, and reading the equilibrium potential E2.

The utility model has the advantages and beneficial effects that: the red outer layer coated outside the stirrer can play a role in prompting the area (or height) where the stirrer is located after the stirrer is placed in the beaker, and can prompt an operator to avoid the bottom of the electrode from colliding with the stirrer when the electrode support is operated by matching with the transparent plastic beaker.

In actual operation, the operator forgets to take off the protective cap and the electrode cap occasionally, so that the diffusion potential can appear to influence the measurement result, the arrangement of the identification sticker can prompt the operator, and the accuracy of operation is ensured.

The outer wall of the plastic beaker is provided with an identification sticker, and the height of the identification sticker is arranged above a moving area stirred by the magnetic stirrer, so that the identification sticker can be used for prompting the distance between the electrode and the bottom of the beaker to avoid the effect of collision of the electrode in the stirring process of the stirrer. And be equipped with two constant temperature water-bath respectively, can guarantee the constant temperature of inlet liquid temperature to can adjust the inlet liquid temperature of needs very fast, avoid the influence of water sample temperature to the accuracy of ion analyzer test.

Drawings

FIG. 1 is a schematic diagram of an ion analyzer for fluoride detection of wastewater based on an ion selective electrode method according to the present invention;

FIG. 2 is a schematic view of the plastic beaker of FIG. 1;

FIG. 3 is a schematic structural view of a three-channel peristaltic pump and an intermittent liquid inlet valve connected with a plastic beaker;

fig. 4 is a schematic diagram of the calomel electrode of fig. 1.

In the figure: 1. an analyzer body; 2. an electromagnetic stirrer; 3. a plastic beaker; 4. a stirrer; 5. label paste; 6. a three-channel peristaltic pump; 7. an intermittent liquid inlet valve; 8. a test liquid bottle or a standard liquid bottle; 9. a deionized water bottle; 10. neutralizing the liquid bottle; 11. a total ion intensity adjusting buffer liquid bottle; 12. a first constant temperature water bath; 13. a second constant temperature water bath; 14. a red surface layer; 15. an adjustable electrode support; 16. a fluorine electrode; 17. a calomel electrode; 18. a liquid feeding pipe; 19. a protective cap; 20. a ceramic core; 21. and an electrode cap.

Detailed Description

The following description of the embodiments of the present invention will be made with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

As shown in fig. 1 to 4 (for convenience of illustration, a three-channel peristaltic pump and an intermittent liquid inlet valve are not shown in fig. 1), the utility model relates to an ion analyzer for detecting fluoride in wastewater based on an ion selective electrode method, which comprises an ion analyzer body 1, an electromagnetic stirrer 2 matched with the ion analyzer body 1, and a transparent plastic beaker 3 matched with the electromagnetic stirrer 2, wherein the outer wall of the plastic beaker 3 is fixedly provided with an identification sticker 5 for prompting the distance of the bottom of an electrode to avoid collision with the electrode in the stirring process of the stirrer 4; a three-channel peristaltic pump 6 is connected with the plastic beaker 3, a liquid inlet pipe of the three-channel peristaltic pump 6 is connected with a test solution bottle or a standard solution bottle 8, a deionized water bottle 9, a neutralization solution bottle 10 and a total ion intensity adjusting buffer solution bottle 11 through an intermittent liquid inlet valve 7, a first constant temperature water bath 12 is arranged at the positions of the test solution bottle or the standard solution bottle 8, the deionized water bottle 9, the neutralization solution bottle 10 and the total ion intensity adjusting buffer solution bottle 11, and a second constant temperature water bath 13 is arranged in the middle of a liquid outlet pipe of the three-channel peristaltic pump 6. The stirrer 4 is matched with the electromagnetic stirrer 2, and the outer surface of the stirrer 4 is coated with a red surface layer 14. The set temperature of the first constant temperature water bath 12 is equal to or higher than the set temperature of the second constant temperature water bath 13. An adjustable electrode bracket 15 is connected with the ion analyzer body 1, and a fluorine electrode 16 and a calomel electrode 17 are connected on the adjustable electrode bracket 15. A liquid adding pipe 18 is integrally arranged at the middle upper part of the calomel electrode 17, the end part of the liquid adding pipe 18 is a liquid adding port, a protective cap 19 is arranged at the liquid adding port, a ceramic core 20 is arranged at the lower end of the calomel electrode 17, and an electrode cap 21 is sleeved at the lower end of the calomel electrode 17; the calomel electrode 17 (and more preferably the cap and cap are provided with identification stickers) is provided with an identification sticker 5 for prompting an operator to remove the cap 19 and cap 21 prior to testing.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The ion analyzer for detecting the wastewater fluoride based on the ion selective electrode method is characterized by comprising an ion analyzer body, an electromagnetic stirrer matched with the ion analyzer body and a transparent plastic beaker matched with the electromagnetic stirrer, wherein the outer wall of the plastic beaker is fixedly provided with a label paste for prompting the bottom distance of an electrode to avoid collision with the electrode in the stirring process of a stirrer; the three-channel peristaltic pump is connected with the plastic beaker, a liquid inlet pipe of the three-channel peristaltic pump is connected with a test solution bottle or a standard solution bottle, a deionized water bottle, a neutralization solution bottle and a total ion intensity adjusting buffer solution bottle through an intermittent liquid inlet valve, a first constant temperature water bath pot is arranged at the test solution bottle or the standard solution bottle, the deionized water bottle, the neutralization solution bottle and the total ion intensity adjusting buffer solution bottle, and a second constant temperature water bath pot is arranged in the middle of a liquid outlet pipe of the three-channel peristaltic pump.

2. The ion analyzer for detecting fluoride in wastewater based on ion selective electrode method according to claim 1, wherein a stirrer is provided in cooperation with the electromagnetic stirrer, and a red surface layer is coated on the outer surface of the stirrer.

3. The ion analyzer for detecting fluoride in wastewater according to claim 1 or 2, wherein the first constant temperature water bath is set to a temperature higher than or equal to the second constant temperature water bath.

4. The ion analyzer for detecting wastewater fluoride according to claim 3, wherein an adjustable electrode holder is connected to the ion analyzer body, and a fluorine electrode and a calomel electrode are connected to the adjustable electrode holder.

5. The ion analyzer for detecting wastewater fluoride according to claim 4, wherein a liquid feeding pipe is integrally arranged at the middle upper part of the calomel electrode, the end part of the liquid feeding pipe is a liquid feeding port, a protective cap is arranged at the liquid feeding port, a ceramic core is arranged at the lower end of the calomel electrode, and an electrode cap is sleeved at the lower end of the calomel electrode; and the calomel electrode is provided with an identification sticker for prompting an operator to take down the protective cap and the electrode cap before testing.