CN114018909A - Test bar for rapidly detecting chloride ions in sewage and preparation method and application thereof - Google Patents
Test bar for rapidly detecting chloride ions in sewage and preparation method and application thereof Download PDFInfo
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- CN114018909A CN114018909A CN202111312444.5A CN202111312444A CN114018909A CN 114018909 A CN114018909 A CN 114018909A CN 202111312444 A CN202111312444 A CN 202111312444A CN 114018909 A CN114018909 A CN 114018909A
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- 238000012360 testing method Methods 0.000 title claims abstract description 105
- 239000010865 sewage Substances 0.000 title claims abstract description 31
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 title claims abstract description 28
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 239000000463 material Substances 0.000 claims abstract description 49
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 34
- 239000000741 silica gel Substances 0.000 claims abstract description 32
- 229910002027 silica gel Inorganic materials 0.000 claims abstract description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000002699 waste material Substances 0.000 claims abstract description 21
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 19
- 239000002253 acid Substances 0.000 claims abstract description 18
- 239000002131 composite material Substances 0.000 claims abstract description 15
- OJKANDGLELGDHV-UHFFFAOYSA-N disilver;dioxido(dioxo)chromium Chemical compound [Ag+].[Ag+].[O-][Cr]([O-])(=O)=O OJKANDGLELGDHV-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229920000742 Cotton Polymers 0.000 claims abstract description 13
- 229960001866 silicon dioxide Drugs 0.000 claims description 30
- 238000002791 soaking Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 10
- 229910001437 manganese ion Inorganic materials 0.000 claims description 9
- 239000011248 coating agent Substances 0.000 claims description 6
- 238000000576 coating method Methods 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 6
- 230000000249 desinfective effect Effects 0.000 claims description 5
- 238000009740 moulding (composite fabrication) Methods 0.000 claims description 4
- 238000001179 sorption measurement Methods 0.000 abstract description 10
- 238000011161 development Methods 0.000 abstract description 6
- 238000001514 detection method Methods 0.000 abstract description 5
- 239000012535 impurity Substances 0.000 abstract description 3
- 238000012544 monitoring process Methods 0.000 abstract description 3
- 239000000243 solution Substances 0.000 description 12
- 230000007797 corrosion Effects 0.000 description 6
- 238000005260 corrosion Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000000835 fiber Substances 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 238000005303 weighing Methods 0.000 description 4
- 238000007605 air drying Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- SQGYOTSLMSWVJD-UHFFFAOYSA-N silver(1+) nitrate Chemical compound [Ag+].[O-]N(=O)=O SQGYOTSLMSWVJD-UHFFFAOYSA-N 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 1
- 150000003841 chloride salts Chemical class 0.000 description 1
- 238000004737 colorimetric analysis Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000003918 potentiometric titration Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 229910001961 silver nitrate Inorganic materials 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 239000010902 straw Substances 0.000 description 1
- 238000004448 titration Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
- G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
- G01N21/78—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator producing a change of colour
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
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- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- General Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Plasma & Fusion (AREA)
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
- Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)
Abstract
The invention discloses a test bar for rapidly detecting chloride ions in sewage, and a preparation method and application thereof. The test stick comprises a test stick shell, a test stick main body arranged in the test stick shell and a filter layer arranged above the test stick main body; the test stick main body comprises a composite base core and allochroic silica gel arranged at the bottom end of the composite base core; the composite base core comprises, by weight, 30-35% of a spunbond layer material, 35-45% of cotton fibers, 5-15% of silver chromate, 10-15% of water-absorbing silica gel and 0.5-1% of a polycarboxylic acid water reducing agent. The test bar provided by the invention adopts the melt-blown layer material of the waste mask as the filter layer, so that impurities and multi-ion interference in sewage can be eliminated, and the detection accuracy is high. Meanwhile, the test bar has the characteristics of high adsorption efficiency, small volume, convenience in use, low cost, large monitoring range and wide application range, and has a good development prospect.
Description
Technical Field
The invention belongs to the field of engineering detection, and particularly relates to a test bar for rapidly detecting the content of chloride ions in sewage, and a preparation method and application thereof.
Background
The content of chloride ions in the sewage is high, and the chloride ions can cause the corrosion of steel bars in buildings. The corrosion of the steel bars can cause the stability of the concrete structure to be reduced, and a large number of early concrete structures are degraded under the condition of not reaching the service life, so that the structures fail early, and huge direct and indirect losses are caused. Economic losses caused by the failure of sewage to be effectively treated have always been a major concern in countries around the world. The corrosion of chloride salts in sewage is one of the most main causes of the corrosion of steel bars. The high content of chloride ions in the sewage in the concrete inevitably causes corrosion of steel bars in the concrete and reduction of the durability of the concrete, thereby causing damage to concrete buildings, wherein the chloride corrosion is particularly serious in the marine environment. At present, methods for detecting chloride ions include a silver nitrate titration method, a ground powder sampling potentiometric titration method, an electrode method, a paper colorimetric method and the like. The methods have the defects of poor portability, time and labor consumption, inconvenient actual use and the like.
At present, due to the influence of epidemic situations, the number of the waste masks is increased sharply, and the recycling problem of the waste masks is more noticed by the public. At present, more methods for recycling the waste masks are urgently needed in the world to reduce the environmental pollution caused by the waste masks.
Under the background, the technology capable of rapidly and accurately detecting the content of chloride ions in sewage on the engineering site by using the waste mask material is developed, so that the engineering risk is reduced, the quality of a concrete product is stabilized, the durability of concrete is improved, the effect of waste utilization is achieved, and the method has extremely important significance.
Disclosure of Invention
The purpose of the invention is as follows: the invention provides a test bar for rapidly detecting chloride ions in sewage and a preparation method and application thereof. According to the invention, impurities and multi-ion interference in sewage are removed by using the filter layer made of the waste mask melt-spraying layer material, and meanwhile, the anti-sticking layer material of the waste mask is creatively combined with the polycarboxylic acid water reducing agent material in the technical field of concrete, so that the polycarboxylic acid water reducing agent with super-dispersibility can obviously improve the uniformity of a fiber net of the spunbond layer material, so that the test bar has high strength, high stability and high uniformity, and the high accuracy of color development of the test bar is ensured. The adsorption rate of the water-absorbing silica gel material stabilizing test rod material is improved, so that the adsorption effect is better, the adsorption efficiency is higher, and the chloride ion content in the sewage is quickly and accurately detected.
The technical scheme is as follows: the test stick for rapidly detecting the chloride ions in the sewage comprises a test stick shell, a test stick main body arranged in the test stick shell and a filter layer arranged above the test stick main body; the test stick main body comprises a composite base core and allochroic silica gel arranged at the bottom end of the composite base core; the composite base core comprises, by weight, 30-35% of a spunbond layer material, 35-45% of cotton fibers, 5-15% of silver chromate, 10-15% of water-absorbing silica gel and 0.5-1% of a polycarboxylic acid water reducing agent.
Preferably, the filter layer is prepared from a melt-blown layer of the mask.
Preferably, the color-changing silica gel accounts for 2-5% of the total mass of the test bar main body.
Preferably, the test stick main body consists of a spun-bonded layer material, cotton fibers, silver chromate, water-absorbing silica gel, a polycarboxylic acid water reducing agent and allochroic silica gel in a mass ratio of 50:59:15:20:1: 5.
Preferably, the test rod main body is of a cylindrical structure.
Preferably, the test rod shell is a hollow cylinder, the hollow cylinder is provided with scale marks, the inner diameter of the test rod shell is 10mm, the outer diameter of the test rod shell is 12mm, and the length of the test rod shell is 62 mm.
Preferably, the length of the test stick main body is 50mm, and the diameter of the test stick main body is 10 mm.
Preferably, the top end of the test rod shell is 10-12mm higher than the top end of the test rod main body.
Preferably, the test stick body is prepared by the following method:
(a) disinfecting the waste mask, separating the spun-bonded layer material and the melt-blown layer material, and cutting the spun-bonded layer material;
(b) adding water-absorbing silica gel, a polycarboxylic acid water reducing agent and the spunbond layer material in the step (a) into a silver chromate solution;
(c) adding the cotton fiber into the solution prepared in the step (b) for soaking, and drying and forming after soaking
(d) Uniformly coating allochroic silica gel on the bottom end of the dried finished product prepared in the step (c), and preparing the melt-blown layer material in the step (a) into a sheet shape and attaching the sheet shape to the upper end of the dried finished product to obtain the test stick main body.
The preparation method of the test bar for rapidly detecting the content of the manganese ions in the water comprises the following steps:
(S1) disinfecting the waste mask, separating the spun-bonded layer material and the melt-blown layer material, and cutting the spun-bonded layer material;
(S2) adding water-absorbing silica gel, a polycarboxylic acid water reducing agent and the spunbond layer material in the step (S1) into the silver chromate solution;
(S3) adding the cotton fiber into the solution prepared in the step (S2) for soaking, and drying and forming after soaking
(S4) uniformly coating the allochroic silicagel on the bottom end of the dried finished product prepared in the step (S3), and then making the melt-blown layer material in the step (S1) into a sheet shape and attaching the sheet shape on the upper end of the dried finished product to obtain the test bar main body.
As a preferred preparation method of the invention, the method comprises the following steps:
step (1): sterilizing the waste mask, separating 5 parts of a spunbond layer and 5 parts of a melt-blown layer, and cutting the spunbond layer;
step (2): adding 1.5 parts of silver chromate into the aqueous solution for dissolving, preparing a silver chromate solution, putting the silver chromate solution into a beaker, and adding 2 parts of water-absorbing silica gel, 0.1 part of polycarboxylic acid water reducing agent and 5 parts of the spun-bonded layer material in the step (1);
and (3): weighing 5.9 parts of cotton fibers, and soaking in the solution prepared in the step (2) for 1-5 min;
and (4): stirring the solution in the step (3) for 10-15min at the speed of 1000-1500r/min by using a stirrer to prepare a composite base core;
and (5): placing the composite base core prepared in the step (4) into a mould, vibrating for 3-5min, placing in a forced air drying oven, and drying at 50-60 ℃;
and (6): and (3) weighing 0.5 part of allochroic silica gel, uniformly coating the allochroic silica gel on one end surface of the dried finished product prepared in the step (5), and preparing the melt-blown layer material in the step (1) into a sheet shape and sticking the sheet shape on the other surface to obtain the finished product.
The test stick or the test stick prepared by the preparation method is applied to detecting chloride ions.
Has the advantages that: (1) the test bar can eliminate multi-ion interference and quickly detect the content of chloride ions in sewage; (2) the invention creatively combines the anti-sticking layer material of the waste mask with the polycarboxylic acid water reducing agent material in the technical field of concrete, and the polycarboxylic acid water reducing agent with super-dispersibility can obviously improve the uniformity of the fiber net of the spunbond layer material and improve the performance of the fiber net, so that the test bar has high strength, high stability and high uniformity, and the high accuracy of the color development of the test bar is ensured. The water-absorbing silica gel material stabilizes the adsorption rate of the test rod material, so that the adsorption effect is better, the adsorption efficiency is higher, and the chloride ion content in the sewage can be quickly and accurately detected; (3) the detection test bar has the characteristics of small volume, convenience in use, high stability, low cost and the like, and has a large monitoring range, a wide application range and a good development prospect.
Drawings
FIG. 1 is a schematic structural diagram of a multi-ion interference eliminating test bar for rapidly detecting the content of chloride ions in sewage;
FIG. 2 is a top view of a multi-ion interference eliminating test bar for rapidly detecting the content of chloride ions in sewage;
FIG. 3 is a graph showing the change in the length of color change of test bars prepared in example 2 at different chloride ion contents;
in fig. 1: 1. a test stick shell 1; 2. a test stick main body; 3. a filter layer.
Detailed Description
The present invention will be described in further detail with reference to the following drawings and examples.
Example 1: the test stick structure prepared by the invention is shown in figures 1 and 2, and comprises a filter layer 3, a test stick 2 and a test stick shell 1 with scales. The 2 parcels of test bar main part are inside test bar casing 1 that has the scale, and in this embodiment, test bar casing 1 is the rigid plastic shell, and the one end of rigid plastic shell is sealed and is used for fixed test bar main part 2, and the other end is the open mode for add and wait to detect sewage. The test stick main body 2 comprises a composite base core 21 and allochroic silica gel 22 arranged at the bottom end of the composite base core 21, and specifically, the test stick main body 2 comprises the following materials: the anti-sticking layer and the melt-blown layer of the waste mask, cotton fiber, water-absorbing silica gel, allochroic silica gel, silver chromate and polycarboxylic acid water reducing agent (water reducing agent SBT-SCC). The test stick main body 2 is cylindrical, 50mm in length and 10mm in diameter. The hard plastic shell is a hollow cylinder, the inner diameter is 10mm, the outer diameter is 12mm, and the length is 62 mm. The hard plastic case 1 is made of transparent hard plastic, and scale marks are printed on the surface of the hard plastic case for reading the color-changing length of the test stick main body 2 inside the hard plastic case. One end of the hard plastic shell is 10mm higher than the test bar, so that the test bar main body 2 is protected from being damaged while sewage is conveniently dripped.
Example 2: the preparation of the test bar for eliminating multi-ion interference and rapidly detecting the content of chloride ions in sewage comprises the following specific steps:
(1) disinfecting a waste mask, separating a spunbond layer 5g and a melt-blown layer 5g, and cutting the spunbond layer;
(2) preparing 300mL of silver chromate solution with the mass concentration of 5g/L, putting the silver chromate solution into a beaker, and adding 2g of water-absorbing silica gel, 0.1g of polycarboxylic acid water reducing agent and 5g of the spunbond layer material in the step (1);
(3) weighing 5.9g of cotton fibers and soaking the cotton fibers in the solution prepared in the step (2), wherein the soaking time is 1 min;
(4) stirring the solution in the step (3) for 10min at the speed of 1000r/min by using a stirrer to prepare a composite base core;
(5) placing the composite base core prepared in the step (4) into a mould, vibrating for 3min, placing the mould into a forced air drying oven, and drying at the temperature of 50 ℃;
(6) weighing 0.5g of allochroic silica gel, uniformly coating on one end surface of the dried finished product prepared in the step (5), and preparing the melt-blown layer material in the step (1) into a sheet shape to be attached to the other surface to obtain the final finished product.
Example 3: the test bar prepared in example 2 was used to measure the chloride ion content in the wastewater.
(1) A plurality of test bars are prepared in advance and are tested by sewage pore liquid with the mass content of chloride ions of 0.005%, 0.01%, 0.02%, 0.03%, 0.04%, 0.05%, 0.06%, 0.07%, 0.08%, 0.09% and 0.10%, sample data are made according to the color change length of the test bars under different chloride ion contents, and the result is shown in figure 3, wherein Y is 152.X in figure 30.496Wherein Y is mass percentage concentration, and X is the color change length (cm) of the test bar.
(2) The sewage detection is carried out according to the obtained data as follows:
absorb sewage with the straw, during rethread open end instiled sewage into the vertical test bar of putting, sewage at first melts the filter layer that spouts the layer and make through abandonment gauze mask through the test bar upper end, waits to read the length that discolours of test bar again after the color-changing silica gel of test bar bottom discolours to with the length data contrast that discolours of sample (fig. 3), thereby obtain the chloride ion content in the sewage.
TABLE 1 test stick test data of the present invention
The design key point of the invention is that the filter layer made of the waste mask melt-spraying layer material can be used for removing impurities and multi-ion interference in sewage, and simultaneously the waste mask anti-sticking layer material is creatively combined with the polycarboxylic acid water reducing agent material in the technical field of concrete, and the polycarboxylic acid water reducing agent with super-dispersibility can obviously improve the uniformity of a fiber net of the spunbond layer material, so that the test bar has high strength, high stability and high uniformity, and the high accuracy of color development of the test bar is ensured. The adsorption rate of the water-absorbing silica gel material stabilizing test rod material is improved, so that the adsorption effect is better, the adsorption efficiency is higher, and the chloride ion content in the sewage is quickly and accurately detected. Meanwhile, the device has the characteristics of small volume, convenience in use, high stability, low cost and the like, and is wide in monitoring range and application range. The rapid detection of the content of chloride ions in the sewage provides guarantee for the engineering quality and reduces the engineering risk. The invention utilizes the waste mask, has the effect of waste utilization and has good development prospect.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the technical scope of the present invention, so that any modification, equivalent change and modification made to the above embodiment according to the technical features of the present invention are still within the technical scope of the present invention.
Claims (10)
1. A test stick for rapidly detecting chloride ions in sewage is characterized by comprising a test stick shell (1), a test stick main body (2) arranged in the test stick shell (1) and a filter layer (3) arranged above the test stick main body (2); the test stick main body (2) comprises a composite base core (21) and allochroic silica gel (22) arranged at the bottom end of the composite base core (21); the composite base core (21) comprises 30-35% of a spun-bonded layer material, 35-45% of cotton fibers, 5-15% of silver chromate, 10-15% of water-absorbing silica gel and 0.5-1% of a polycarboxylic acid water reducing agent in percentage by total mass of the test bar main body (2).
2. The test bar for rapidly detecting the content of the manganese ions in water according to claim 1, wherein the filter layer (3) is prepared by a melt-blown layer of a mask.
3. The test stick for rapidly detecting the content of manganese ions in water according to claim 1, wherein the allochroic silicagel (22) accounts for 2-5% of the total mass of the test stick main body (2).
4. The test bar for rapidly detecting the content of manganese ions in water according to claim 1, wherein the test bar main body (2) is composed of a spun-bonded layer material, cotton fibers, silver chromate, water-absorbing silica gel, a polycarboxylic acid water reducing agent and allochroic silica gel in a mass ratio of 50:59:15:20:1: 5.
5. The test bar for rapidly detecting the content of manganese ions in water according to claim 1, wherein the test bar body (2) has a cylindrical structure.
6. The test bar for rapidly detecting the content of manganese ions in water according to claim 5, wherein the test bar shell (1) is a hollow cylinder, the hollow cylinder is provided with scale marks, the inner diameter of the test bar shell is 10mm, the outer diameter of the test bar shell is 12mm, and the length of the test bar shell is 62 mm.
7. The test bar for rapidly detecting the content of manganese ions in water according to claim 6, wherein the length of the test bar body is 50mm, and the diameter of the test bar body is 10-12 mm.
8. The test bar for rapidly detecting the content of manganese ions in water according to claim 1, wherein the test bar main body (2) is prepared by the following method:
(a) disinfecting the waste mask, separating the spun-bonded layer material and the melt-blown layer material, and cutting the spun-bonded layer material;
(b) adding water-absorbing silica gel, a polycarboxylic acid water reducing agent and the spunbond layer material in the step (a) into a silver chromate solution;
(c) adding the cotton fiber into the solution prepared in the step (b) for soaking, and drying and forming after soaking
(d) Uniformly coating allochroic silica gel on the bottom end of the dried finished product prepared in the step (c), and then making the melt-blown layer material in the step (a) into a sheet shape and attaching the sheet shape to the upper end of the dried finished product to obtain the test stick main body (2).
9. A preparation method of a test rod for rapidly detecting the content of manganese ions in water is characterized by comprising the following steps:
(S1) disinfecting the waste mask, separating the spun-bonded layer material and the melt-blown layer material, and cutting the spun-bonded layer material;
(S2) adding water-absorbing silica gel, a polycarboxylic acid water reducing agent and the spunbond layer material in the step (S1) into the silver chromate solution;
(S3) adding the cotton fiber into the solution prepared in the step (S2) for soaking, and drying and forming after soaking
(S4) uniformly coating the allochroic silicagel on the bottom end of the dried finished product prepared in the step (S3), and then making the melt-blown layer material in the step (S1) into a sheet shape and attaching the sheet shape on the upper end of the dried finished product to obtain the test rod main body (2).
10. Use of a test stick according to any one of claims 1 to 8 or a test stick prepared by the method according to claim 9 for detecting chloride ions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111312444.5A CN114018909A (en) | 2021-11-08 | 2021-11-08 | Test bar for rapidly detecting chloride ions in sewage and preparation method and application thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111312444.5A CN114018909A (en) | 2021-11-08 | 2021-11-08 | Test bar for rapidly detecting chloride ions in sewage and preparation method and application thereof |
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| CN114018909A true CN114018909A (en) | 2022-02-08 |
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2021
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