CN112683889A - Binary chromogenic test paper and method for rapidly and semi-quantitatively detecting Cd (II) - Google Patents
Binary chromogenic test paper and method for rapidly and semi-quantitatively detecting Cd (II) Download PDFInfo
- Publication number
- CN112683889A CN112683889A CN202011403173.XA CN202011403173A CN112683889A CN 112683889 A CN112683889 A CN 112683889A CN 202011403173 A CN202011403173 A CN 202011403173A CN 112683889 A CN112683889 A CN 112683889A
- Authority
- CN
- China
- Prior art keywords
- test paper
- binary
- pan
- solution
- developing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- 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 binary color-developing test paper and a method for rapidly and semi-quantitatively detecting Cd (II), which comprises the steps of taking PAN and dithizone (Dz) as composite color-developing agents, attaching to medium-speed filter paper, and preparing the binary color-developing test paper of Cd (II); preparing a binary color development type test paper standard colorimetric plate; the purpose of selectively and rapidly measuring Cd (II) is achieved by regulating and controlling the type and the dosage of the masking agent. The method has the advantages of simple operation, wide color development range, high accuracy, convenience in carrying and storage, widening the detection range of the test paper method for Cd (II), and the like.
Description
Technical Field
The invention belongs to the technical field of test paper preparation and application, relates to a preparation method of semi-quantitative test paper for Cd (II), and further relates to a method for detecting the content of Cd (II).
Background
With the rapid development of industries such as mining and metallurgy, the heavy metal ions in the environment are increasing. Mineral wastewater contains a large amount of heavy metal ions, such as Pb (II) and Cd (II), which continuously migrate to surface water and underground water over time. Cd (II) is a common heavy metal ion in water, has strong toxicity to biological communities in water, and finally enters a human body through the layer-by-layer accumulation of food chain action, thereby causing serious damage to the heart, liver and bone tissues of the human body; in addition, Cd (II) has the characteristics of strong enrichment and difficult degradation, so that the research of sensitive detection of low-concentration Cd (II) is very important.
Patent CN103969258A discloses a test paper and a method for rapid detection of Cd (II) by naked eyes, wherein the color development range is 1 × 10 although the operation technical requirement is low and the field detection is convenient-6～1×10-2mol·L-1For Cd (II) concentrations below 1X 10-6mol·L-1The water sample cannot be subjected to color development and quantification; patent CN111307778A discloses a method for preparing a semi-quantitative test paper for copper ions and a method for detecting the same, but the test paper has complicated preparation steps and needs vacuum drying. Therefore, it is necessary to develop a detection method with simple operation, wide color development range and high accuracy.
Disclosure of Invention
Aiming at the defect that the existing test paper method has a narrow Cd (II) color development range, the invention aims to provide a binary color development test paper and a method for rapidly and semi-quantitatively detecting Cd (II), wherein the method has the advantages of simple operation, wide color development range, high accuracy, convenience in use, convenience in carrying and storage, widening the detection range of the test paper method for Cd (II) and the like.
The invention is realized by the following technical scheme.
A method for rapidly and semi-quantitatively detecting Cd (II) by using binary chromogenic test paper comprises the following steps:
step 1, preparing PAN/Dz binary color-developing test paper
Mixing a PAN (1- (2-pyridylazo) -2 naphthol) chloroform solution and a Dz (dithizone) chloroform solution according to a mass ratio of 0.3/0.2 to prepare a PAN/Dz chloroform solution binary color developing agent, soaking the test paper in the PAN/Dz chloroform solution binary color developing agent, taking out the test paper after a certain time, and drying to obtain a binary color developing type test paper;
step 2, preparing a PAN/Dz binary color development type test paper standard colorimetric plate
Preparing a series of concentration gradient Cd (II) solutions, dropwise adding the solutions on the binary color-developing test paper prepared in the step (1), developing for a certain time, sucking the residual Cd (II) solutions by using absorbent paper, drying, inspecting and taking reaction fragments to prepare a PAN/Dz binary color-developing test paper standard colorimetric plate;
step 3, detecting Cd (II) solution with unknown concentration
And (3) adjusting the pH value of the Cd (II) solution to be detected, respectively adding a masking agent, dropwise adding the Cd (II) solution to be detected onto the binary color-developing test paper prepared in the step (1), detecting the color change, comparing the color change with the standard colorimetric plate prepared in the step (2), and carrying out semi-quantitative determination on the concentration of the Cd (II) solution to be detected.
With respect to the above technical solutions, the present invention has a further preferable solution:
preferably, in the step 1, the test paper is medium-speed qualitative filter paper, is soaked in a PAN/Dz chloroform solution for 30-60 min, is taken out, and is dried in an oven at 40-60 ℃.
Preferably, in the step 1, the mass concentration of the PAN chloroform solution is 0.003-0.015%, and the mass concentration of the Dz chloroform solution is 0.0015-0.0075%.
Preferably, in the step 2, the color development time is 30-90 s.
Preferably, in the step 3, the pH value of the Cd (II) solution to be detected is adjusted to 5-8.
Preferably, in the step 2, the concentration ranges of the series Cd (II) standard solutions are 8.90 × 10-7～8.90×10-4mol·L-1。
Preferably, in the step 3, the masking agent comprises the following raw materials in parts by mass:
2-6 parts of thiourea, 2-6 parts of phenanthroline, 2-9 parts of citric acid and 13-26 parts of thioglycolic acid.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
1) the binary color-developing test paper and the method for rapidly and semi-quantitatively detecting Cd (II) provided by the invention have the advantages that the color development and inspection time is 30-90 s, the time consumption is short, and the method is an ideal rapid determination method.
2) The binary color-developing test paper and the method for rapidly and semi-quantitatively detecting Cd (II) provided by the invention can be used for detecting Cd (II) with the concentration of 8.90 multiplied by 10-7～8.90×10-4Semi-quantitative detection of Cd (II) between mol/L is realized, and LOD is 8.90 multiplied by 10-7mol/L。
3) Compared with a precious detection instrument used in a laboratory, the binary chromogenic test paper and the method for rapidly detecting Cd (II) in a semi-quantitative manner have the advantages of low equipment requirement, simple operation method, wide chromogenic range, high accuracy and convenience for field detection.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention:
FIGS. 1(a) and 1(b) are UV-VIS absorption spectra before and after the complexation of PAN (a), Dz (b) and Cd (II), respectively;
FIG. 2 is a standard colorimetric plate of PAN/Dz binary colorimetric cadmium test paper.
Detailed Description
The present invention will now be described in detail with reference to the drawings and specific embodiments, wherein the exemplary embodiments and descriptions of the present invention are provided to explain the present invention without limiting the invention thereto.
The embodiment of the invention provides binary chromogenic test paper and a method for quickly and semi-quantitatively detecting Cd (II), which comprises the following steps:
step 1, preparing PAN (1- (2-pyridylazo) -2 naphthol)/Dz (dithizone) binary color-developing test paper.
Mixing the PAN chloroform solution and the Dz chloroform solution according to the mass ratio of 0.3/0.2 to prepare a PAN/Dz chloroform solution binary color developing agent, wherein the mass concentration of the PAN chloroform solution is 0.003-0.015%, and the mass concentration of the Dz chloroform solution is 0.0015-0.0075%; soaking a disc-shaped medium-speed qualitative filter paper with the diameter of 6mm in the medium-speed qualitative filter paper, soaking the disc-shaped medium-speed qualitative filter paper in a PAN/Dz chloroform solution for 30-60 min, taking out the disc-shaped medium-speed qualitative filter paper, and drying the disc-shaped medium-speed qualitative filter paper in a drying oven at the temperature of 40-60 ℃ to obtain the binary color development type test paper.
FIGS. 1(a) and 1(b) show the UV-VIS absorption spectra before and after complexation of PAN, Dz and Cd (II). PAN and Dz are mixed to be a composite color developing agent, so that the color change of the reaction is enhanced on one hand, and the semi-quantitative detection range of Cd (II) by the composite color developing agent is widened on the other hand.
Step 2, preparing a PAN/Dz binary color development type test paper standard colorimetric plate
Preparing serial Cd (II) solutions with concentration gradient of 8.90X 10-7～8.90×10- 4mol·L-1And (2) dropwise adding the reagent solution on the binary color-developing test paper prepared in the step (1), developing for 30-90 s, sucking the residual Cd (II) solution by using absorbent paper, drying, inspecting and taking reaction fragments to prepare a PAN/Dz binary color-developing test paper standard colorimetric plate.
FIG. 2 shows a standard colorimetric plate of PAN/Dz binary colorimetric cadmium test paper.
Step 3, detecting Cd (II) solution with unknown concentration
Adjusting the pH value of the Cd (II) solution to be detected to 5-8, and respectively adding a masking agent for eliminating the interference of other coexisting ions, wherein the masking agent comprises the following raw materials in parts by mass: 2-6 parts of thiourea, 2-6 parts of phenanthroline, 2-9 parts of citric acid and 13-26 parts of thioglycolic acid.
And (3) transferring the solution of Cd (II) to be detected by using a rubber-tipped dropper, dripping the solution of Cd (II) to be detected onto the test paper prepared in the step (1), detecting the color change, comparing the color change with the standard colorimetric plate prepared in the step (2), and carrying out semi-quantitative determination on the concentration of the Cd (II).
The invention is further illustrated by the following different examples.
Example 1: detection of Cd (II) concentration in unknown water sample 1
Step 1, preparing PAN/Dz binary color-developing test paper
Preparing a binary color developing agent by using 0.3/0.2 mass ratio of PAN and Dz solution, wherein the mass concentration of the PAN chloroform solution is 0.005%, and the mass concentration of the Dz chloroform solution is 0.0075%; and soaking the disc-shaped test paper with the diameter of 6mm in the test paper, taking out the test paper after 30min, and drying the test paper in a 60 ℃ oven to obtain the binary chromogenic test paper.
Step 2, preparing a PAN/Dz binary color development type test paper standard colorimetric plate
Preparing serial Cd (II) solutions with concentration gradient of 8.90X 10-7～8.90×10- 4mol·L-1Dripping the test paper on the binary color-developing test paper prepared in the step 1 for developing colorAnd (5) sucking the residual Cd (II) solution for 30s by using absorbent paper, drying, inspecting and taking reaction fragments to prepare a PAN/Dz binary chromogenic test paper standard colorimetric plate.
Step 3, detecting Cd (II) solution with unknown concentration
Adjusting the pH value of the Cd (II) solution to be detected to 7, and respectively adding a masking agent, wherein the masking agent comprises the following raw materials in parts by weight: 6 parts of thiourea, 5 parts of phenanthroline, 7 parts of citric acid and 20 parts of thioglycolic acid.
Taking a group of water samples to carry out three times of parallel experiments, transferring a Cd (II) solution to be detected (the pH value is 7) by using a rubber-tipped dropper, dripping the Cd (II) solution to be detected onto the test paper prepared in the step 1, inspecting the color change, comparing the color change with the standard colorimetric plate prepared in the step 2, and carrying out semi-quantitative determination on the concentration of the Cd (II) solution.
The colorimetric result shows that the concentration of Cd (II) in the solution is 4.45 multiplied by 10-6～8.90×10-6Between mol/L. The data obtained by ICP examination were 7.36X 10, respectively-6And the mol/L is consistent with the range of the result obtained after the comparison with a colorimetric plate, and the colors displayed among the three groups of parallel samples are also the same, which shows that the test paper has good accuracy and stability.
Example 2: detection of Cd (II) concentration in unknown water sample 2
Step 1, preparing PAN/Dz binary color-developing test paper
Preparing a binary color developing agent by using 0.3/0.2 mass ratio of PAN and Dz solution, wherein the mass concentration of the PAN chloroform solution is 0.0075%, and the mass concentration of the Dz chloroform solution is 0.003%; and soaking the disc-shaped test paper with the diameter of 6mm in the test paper, taking out the test paper after 40min, and drying the test paper in a 50 ℃ oven to obtain the binary chromogenic test paper.
Step 2, preparing a PAN/Dz binary color development type test paper standard colorimetric plate
Preparing serial Cd (II) solutions with concentration gradient of 8.90X 10-7～8.90×10- 4mol·L-1And (2) dropwise adding the test paper into the binary color-developing test paper prepared in the step (1), developing for 40s, sucking the residual Cd (II) solution by using absorbent paper, drying, inspecting and taking reaction fragments, and preparing a PAN/Dz binary color-developing test paper standard colorimetric plate.
Step 3, detecting Cd (II) solution with unknown concentration
Adjusting the pH value of the Cd (II) solution to be detected to 7, and respectively adding a masking agent, wherein the masking agent comprises the following raw materials in parts by weight: 4 parts of thiourea, 6 parts of phenanthroline, 8 parts of citric acid and 13 parts of thioglycolic acid.
Taking a group of water samples to carry out three times of parallel experiments, transferring a Cd (II) solution to be detected (the pH value is 7) by using a rubber-tipped dropper, dripping the Cd (II) solution to be detected onto the test paper prepared in the step 1, inspecting the color change, comparing the color change with the standard colorimetric plate prepared in the step 2, and carrying out semi-quantitative determination on the concentration of the Cd (II) solution.
The colorimetric result shows that the concentration of Cd (II) in the solution is 4.45 multiplied by 10-6～8.90×10-6Between mol/L. The data obtained by ICP examination were 4.59X 10, respectively-6And the mol/L is consistent with the range of the result obtained after the comparison with a colorimetric plate, and the colors displayed among the three groups of parallel samples are also the same, which shows that the test paper has good accuracy.
Example 3: detection of Cd (II) concentration in simulated water sample 1
Step 1, preparing PAN/Dz binary color development type test paper.
Preparing a binary color developing agent by using 0.3/0.2 mass ratio of PAN and Dz solution, wherein the mass concentration of the PAN chloroform solution is 0.003 percent, and the mass concentration of the Dz chloroform solution is 0.0015 percent; and soaking the disc-shaped test paper with the diameter of 6mm in the test paper, taking out the test paper after 50min, and drying the test paper in a drying oven at 40 ℃ to obtain the binary chromogenic test paper.
Step 2, preparing a PAN/Dz binary color development type test paper standard colorimetric plate
Preparing serial Cd (II) solutions with concentration gradient of 8.90X 10-7～8.90×10- 4mol·L-1And (2) dropwise adding the reagent solution on the binary color-developing test paper prepared in the step (1), developing for 80s, sucking the residual Cd (II) solution by using absorbent paper, drying, inspecting and taking reaction fragments, and preparing a PAN/Dz binary color-developing test paper standard colorimetric plate.
In the step 3, interference ions such as Zn (II), Cu (II) and the like are contained in the simulated water sample, and a masking agent for eliminating the interference of other coexisting ions is added into the water sample before the water sample is transferred, wherein the masking agent is 4 parts of thiourea, 6 parts of phenanthroline, 9 parts of citric acid and 13 parts of thioglycolic acid.
Semi-quantitative detection is carried out by utilizing binary chromogenic test paper, and the result is 4.45 multiplied by 10-4～8.90×10-4Between mol/L, the data obtained by ICP examination was 5.21X 10-4And the mol/L is consistent with the range of the result obtained after comparison with a colorimetric plate, and the colors displayed among the three groups of parallel samples are also the same, which indicates that the test paper has better accuracy.
Example 4: detection of Cd (II) concentration in simulated water sample 2
Step 1, preparing PAN/Dz binary color development type test paper.
Preparing a binary color developing agent by using 0.3/0.2 mass ratio of PAN and Dz solution, wherein the mass concentration of the PAN chloroform solution is 0.025 percent, and the mass concentration of the Dz chloroform solution is 0.0035 percent; and soaking the disc-shaped test paper with the diameter of 6mm in the test paper, taking out the test paper after 40min, and drying the test paper in a 55 ℃ oven to obtain the binary chromogenic test paper.
Step 2, preparing a PAN/Dz binary color development type test paper standard colorimetric plate
Preparing serial Cd (II) solutions with concentration gradient of 8.90X 10-5～8.90×10- 4mol·L-1And (2) dropwise adding the test paper into the binary color-developing test paper prepared in the step (1), developing for 75s, sucking the residual Cd (II) solution by using absorbent paper, drying, inspecting and taking reaction fragments, and preparing a PAN/Dz binary color-developing test paper standard colorimetric plate.
In the step 3, interference ions such as Zn (II), Cu (II) and the like are contained in the simulated water sample, and a masking agent for eliminating the interference of other coexisting ions is added into the water sample before the water sample is transferred, wherein the masking agent is 5 parts of thiourea, 5 parts of phenanthroline, 7 parts of citric acid and 15 parts of thioglycolic acid.
Semi-quantitative detection is carried out by utilizing binary chromogenic test paper, and the result is 4.45 multiplied by 10-4～8.90×10-4Between mol/L, the data obtained by ICP examination was 7.09X 10-4And the mol/L is consistent with the range of the result obtained after comparison with a colorimetric plate, and the colors displayed among the three groups of parallel samples are also the same, which indicates that the test paper has better accuracy.
Example 5: detection of concentration of Cd (II) in smelting treatment wastewater 1
Step 1, preparing PAN/Dz binary color development type test paper.
Preparing a binary color developing agent by using 0.3/0.2 mass ratio of PAN and Dz solution, wherein the mass concentration of the PAN chloroform solution is 0.003 percent, and the mass concentration of the Dz chloroform solution is 0.0055 percent; and soaking the disc-shaped test paper with the diameter of 6mm in the test paper, taking out the test paper after 60min, and drying the test paper in a 50 ℃ oven to obtain the binary chromogenic test paper.
Step 2, preparing a PAN/Dz binary color development type test paper standard colorimetric plate
Preparing serial Cd (II) solutions with concentration gradient of 8.90X 10-7～8.90×10- 4mol·L-1And (2) dropwise adding the reagent solution on the binary color-developing test paper prepared in the step (1), developing for 90s, sucking the residual Cd (II) solution by using absorbent paper, drying, inspecting and taking reaction fragments, and preparing a PAN/Dz binary color-developing test paper standard colorimetric plate.
In the step 3, the detected water sample is wastewater after primary treatment of a certain nonferrous metal smelting plant in Shaanxi province, the wastewater contains interference ions such as Zn (II), Cu (II), Ni (II), Pb (II) and the like, a masking agent for eliminating the interference of coexisting ions is added into the water sample before the water sample is removed, and the masking agent comprises the following raw materials in parts by mass: 2 parts of thiourea, 2 parts of phenanthroline, 2 parts of citric acid and 26 parts of thioglycolic acid.
The concentration of Cd (II) in the water sample is 4.45X 10 by comparing with the standard colorimetric plate-5～8.90×10-5Between mol/L, the data obtained by ICP detection is 6.28 multiplied by 10-5And the mol/L is consistent with the range of the result obtained by comparing the color comparison sample with the color comparison sample, and the colors displayed among the parallel samples are also the same, which shows that the test paper has good accuracy and applicability.
Example 6: detection of Cd (II) concentration in smelting treatment wastewater 2
Step 1, preparing PAN/Dz binary color development type test paper.
Preparing a binary color developing agent by using 0.3/0.2 mass ratio of PAN and Dz solution, wherein the mass concentration of the PAN chloroform solution is 0.0075%, and the mass concentration of the Dz chloroform solution is 0.003%; and soaking the disc-shaped test paper with the diameter of 6mm in the test paper, taking out the test paper after 50min, and drying the test paper in a 60 ℃ oven to obtain the binary chromogenic test paper.
Step 2, preparing a PAN/Dz binary color development type test paper standard colorimetric plate
Preparing serial Cd (II) solutions with concentration gradient of 8.90X 10-7～8.90×10- 4mol·L-1And (2) dropwise adding the reagent solution on the binary color-developing test paper prepared in the step (1), developing for 60s, sucking the residual Cd (II) solution by using absorbent paper, drying, inspecting and taking reaction fragments, and preparing a PAN/Dz binary color-developing test paper standard colorimetric plate.
In the step 3, the detected water sample is wastewater after primary treatment of a certain nonferrous metal smelting plant in Shaanxi province, the wastewater contains interference ions such as Zn (II), Cu (II), Ni (II), Pb (II) and the like, a masking agent for eliminating the interference of coexisting ions is added into the water sample before the water sample is removed, and the masking agent comprises the following raw materials in parts by mass: 4 parts of thiourea, 6 parts of phenanthroline, 8 parts of citric acid and 13 parts of thioglycolic acid.
The concentration of Cd (II) in the water sample is 4.45X 10 by comparing with the standard colorimetric plate-5～8.90×10-5Between mol/L, the data obtained by ICP detection is 8.63 multiplied by 10-5And the mol/L is consistent with the range of the result obtained by comparing the color comparison sample with the color comparison sample, and the colors displayed among the parallel samples are also the same, which shows that the test paper has good accuracy and applicability.
In conclusion, the binary color-developing test paper and the method for rapidly and semi-quantitatively detecting Cd (II) provided by the invention have a wider detection range of Cd (II), and can be used for detecting Cd (II) with a concentration of 8.90 × 10-7～8.90×10-4Semi-quantitative detection of Cd (II) between mol/L is realized, and LOD is 8.90 multiplied by 10-7The mol/L, the developing and the inspecting time are both 60s, the consumed time is short, the accuracy, the stability and the applicability are better, the test paper is easy to prepare, and the operation is simple.
The present invention is not limited to the above-mentioned embodiments, and based on the technical solutions disclosed in the present invention, those skilled in the art can make some substitutions and modifications to some technical features without creative efforts according to the disclosed technical contents, and these substitutions and modifications are all within the protection scope of the present invention.
Claims (8)
1. A method for rapidly and semi-quantitatively detecting Cd (II) by using binary chromogenic test paper is characterized by comprising the following steps:
step 1, preparing PAN/Dz binary color-developing test paper
Mixing the PAN chloroform solution and the Dz chloroform solution according to the mass ratio of 0.3/0.2 to prepare a PAN/Dz chloroform solution binary color developing agent, soaking the test paper in the PAN/Dz chloroform solution binary color developing agent, taking out the test paper after a certain time, and drying the test paper to obtain a binary color developing type test paper;
step 2, preparing a PAN/Dz binary color development type test paper standard colorimetric plate
Preparing a series of concentration gradient Cd (II) solutions, dropwise adding the solutions on the binary color-developing test paper prepared in the step (1), developing for a certain time, sucking the residual Cd (II) solutions by using absorbent paper, drying, inspecting and taking reaction fragments to prepare a PAN/Dz binary color-developing test paper standard colorimetric plate;
step 3, detecting Cd (II) solution with unknown concentration
And (3) adjusting the pH value of the Cd (II) solution to be detected, respectively adding a masking agent, dropwise adding the Cd (II) solution to be detected onto the binary color-developing test paper prepared in the step (1), detecting the color change, comparing the color change with the standard colorimetric plate prepared in the step (2), and carrying out semi-quantitative determination on the concentration of the Cd (II) solution to be detected.
2. The method for rapidly and semi-quantitatively detecting Cd (II) by using the binary chromogenic test paper as claimed in claim 1, wherein in the step 1, the test paper is medium-speed qualitative filter paper, is soaked in a PAN/Dz chloroform solution for 30-60 min, is taken out, and is dried in an oven at 40-60 ℃.
3. The method for rapidly and semi-quantitatively detecting Cd (II) by using the binary color test paper as claimed in claim 1, wherein in the step 1, the mass concentration of the PAN chloroform solution is 0.003-0.015%, and the mass concentration of the Dz chloroform solution is 0.0015-0.0075%.
4. The method for rapidly and semi-quantitatively detecting Cd (II) by using the binary chromogenic test paper as claimed in claim 1, wherein in the step 2, the chromogenic time is 30-90 s.
5. The method for rapidly and semi-quantitatively detecting Cd (II) by using the binary chromogenic test paper as claimed in claim 1, wherein in the step 3, the pH of a solution of Cd (II) to be detected is adjusted to 5-8.
6. The method for rapidly and semi-quantitatively detecting Cd (II) by using the binary chromogenic test paper as claimed in claim 1, wherein in the step 2, the concentration range of the series Cd (II) standard solution is 8.90 x 10-7～8.90×10-4mol·L-1。
7. The method for rapidly and semi-quantitatively detecting Cd (II) by using the binary chromogenic test paper as claimed in claim 1, wherein in the step 3, the masking agent comprises the following raw materials in parts by mass:
2-6 parts of thiourea, 2-6 parts of phenanthroline, 2-9 parts of citric acid and 13-26 parts of thioglycolic acid.
8. The binary color test paper used according to any one of claims 1 to 7, wherein the test paper is prepared by soaking medium-speed quantitative filter paper in 0.003-0.015% PAN and 0.0015-0.0075% Dz chloroform solution at a ratio of 0.3/0.2 for 30-60 min, and drying in an oven at 40-60 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011403173.XA CN112683889B (en) | 2020-12-04 | 2020-12-04 | Binary chromogenic test paper and method for rapidly and semi-quantitatively detecting Cd (II) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011403173.XA CN112683889B (en) | 2020-12-04 | 2020-12-04 | Binary chromogenic test paper and method for rapidly and semi-quantitatively detecting Cd (II) |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112683889A true CN112683889A (en) | 2021-04-20 |
| CN112683889B CN112683889B (en) | 2023-01-17 |
Family
ID=75447281
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011403173.XA Active CN112683889B (en) | 2020-12-04 | 2020-12-04 | Binary chromogenic test paper and method for rapidly and semi-quantitatively detecting Cd (II) |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112683889B (en) |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1614397A (en) * | 2004-11-23 | 2005-05-11 | 浙江省农业科学院 | Reagent box and detecting method for nitrate and nitrite content of vegetables and fruits |
| US20070031972A1 (en) * | 2005-08-05 | 2007-02-08 | Attar Amir J | Detection of poisons in materials such as food using colorimetric detection |
| CN101978263A (en) * | 2008-03-21 | 2011-02-16 | 爱科来株式会社 | Dry testing tool, method for measuring metal, and method for producing dry testing tool |
| CN103487390A (en) * | 2013-09-18 | 2014-01-01 | 深圳市绿恩环保技术有限公司 | Testing method for cadmium content in water body |
| JP2014052369A (en) * | 2012-08-07 | 2014-03-20 | Matsumura Sekiyu Kk | Simple detection method of metal |
| CN103760154A (en) * | 2013-09-12 | 2014-04-30 | 天津凯英科技发展有限公司 | Rapid heavy metal detection method, and detection test paper and preparation method thereof |
| CN103776822A (en) * | 2013-09-12 | 2014-05-07 | 天津凯英科技发展有限公司 | Rapid heavy-metal detection method, as well as test paper and preparation method thereof |
| CN103969258A (en) * | 2014-05-21 | 2014-08-06 | 山西大学 | Test paper and method for rapidly detecting Cd<2+> by virtue of naked eyes |
| RU2613762C1 (en) * | 2015-09-17 | 2017-03-21 | Федеральное государственное автономное образовательное учреждение высшего образования "Национальный исследовательский Томский государственный университет" (ТГУ, НИ ТГУ) | Method for metal amount determination using polymethacrylate matrix |
| CN206132631U (en) * | 2016-06-30 | 2017-04-26 | 青海出入境检验检疫局检验检疫综合技术中心 | Test paper of short -term test heavy metal cadmium |
| CN107247049A (en) * | 2017-06-12 | 2017-10-13 | 天津科技大学 | The test paper of cadmium content in a kind of detection cereal with screening agent |
| CN110793962A (en) * | 2019-12-17 | 2020-02-14 | 四川省科源工程技术测试中心 | Test paper for detecting content of lead ions in wastewater and application thereof |
| CN111579510A (en) * | 2020-05-29 | 2020-08-25 | 西安建筑科技大学 | Light sensing film and method for rapidly, quantitatively and selectively detecting Cd (II), Cu (II) and Zn (II) |
-
2020
- 2020-12-04 CN CN202011403173.XA patent/CN112683889B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1614397A (en) * | 2004-11-23 | 2005-05-11 | 浙江省农业科学院 | Reagent box and detecting method for nitrate and nitrite content of vegetables and fruits |
| US20070031972A1 (en) * | 2005-08-05 | 2007-02-08 | Attar Amir J | Detection of poisons in materials such as food using colorimetric detection |
| CN101978263A (en) * | 2008-03-21 | 2011-02-16 | 爱科来株式会社 | Dry testing tool, method for measuring metal, and method for producing dry testing tool |
| JP2014052369A (en) * | 2012-08-07 | 2014-03-20 | Matsumura Sekiyu Kk | Simple detection method of metal |
| CN103776822A (en) * | 2013-09-12 | 2014-05-07 | 天津凯英科技发展有限公司 | Rapid heavy-metal detection method, as well as test paper and preparation method thereof |
| CN103760154A (en) * | 2013-09-12 | 2014-04-30 | 天津凯英科技发展有限公司 | Rapid heavy metal detection method, and detection test paper and preparation method thereof |
| CN103487390A (en) * | 2013-09-18 | 2014-01-01 | 深圳市绿恩环保技术有限公司 | Testing method for cadmium content in water body |
| CN103969258A (en) * | 2014-05-21 | 2014-08-06 | 山西大学 | Test paper and method for rapidly detecting Cd<2+> by virtue of naked eyes |
| RU2613762C1 (en) * | 2015-09-17 | 2017-03-21 | Федеральное государственное автономное образовательное учреждение высшего образования "Национальный исследовательский Томский государственный университет" (ТГУ, НИ ТГУ) | Method for metal amount determination using polymethacrylate matrix |
| CN206132631U (en) * | 2016-06-30 | 2017-04-26 | 青海出入境检验检疫局检验检疫综合技术中心 | Test paper of short -term test heavy metal cadmium |
| CN107247049A (en) * | 2017-06-12 | 2017-10-13 | 天津科技大学 | The test paper of cadmium content in a kind of detection cereal with screening agent |
| CN110793962A (en) * | 2019-12-17 | 2020-02-14 | 四川省科源工程技术测试中心 | Test paper for detecting content of lead ions in wastewater and application thereof |
| CN111579510A (en) * | 2020-05-29 | 2020-08-25 | 西安建筑科技大学 | Light sensing film and method for rapidly, quantitatively and selectively detecting Cd (II), Cu (II) and Zn (II) |
Non-Patent Citations (3)
| Title |
|---|
| 王京平: "水溶性PAN-6S的纯化及其Cd(Ⅱ)的研究", 《环境与开发》 * |
| 郑海金等: "PAN-6S分光光度法测定工业废水中的微量汞", 《河南大学学报(自然科学版)》 * |
| 黄秀莲: "《环境分析与监测》", 30 November 1989, 北京：高等教育出版社 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112683889B (en) | 2023-01-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Jungreis | Spot test analysis | |
| EP0508388A1 (en) | Method and composition for the determination of bicarbonate ions in fluids | |
| Qin et al. | Chemiluminescence flow system for the determination of Fe (II) and Fe (III) in water | |
| CN110132916B (en) | Accurate quantitative analysis method for metal elements | |
| Afkhami et al. | Kinetic–spectrophotometric determination of selenium in natural water after preconcentration of elemental selenium on activated carbon | |
| Monteiro et al. | Towards field trace metal speciation using electroanalytical techniques and tangential ultrafiltration | |
| Zaporozhets et al. | Determination of ascorbic acid by molecular spectroscopic techniques | |
| CN106872456A (en) | Nitrite detection lateral chromatography test paper and preparation method thereof | |
| Garčic | A highly sensitive, simple determination of serum iron using chromazurol B | |
| CN112014389A (en) | Ascorbic acid interference-based urine occult blood test paper and preparation method thereof | |
| Zare-Dorabei et al. | Design of a novel optical sensor for determination of trace gadolinium | |
| CN112683889B (en) | Binary chromogenic test paper and method for rapidly and semi-quantitatively detecting Cd (II) | |
| CN111579510B (en) | Light sensing film and method for rapidly and quantitatively detecting Cd (II), cu (II) and Zn (II) selectively | |
| CN104133035B (en) | A kind of minusing measures the method for magnesium metal content in briquetting modulizer | |
| CN103512929A (en) | Electric enhanced color development method and device thereof for rapid detection of lead ions or ferrous ions | |
| CN113049577A (en) | Copper ion detection kit based on polyether sulfone material and detection method | |
| Yang et al. | Advances in the analysis methods of inorganic elements in foods | |
| CN107727787A (en) | A kind of TLC Identification for differentiating hymsleya amabilis kind | |
| CN109459420B (en) | Method for detecting di/ferric iron ions in water body | |
| CN116429759A (en) | Phosphate colorimetric detection test paper and preparation method and application thereof | |
| Butts et al. | Colorimetric determination of metals in sewage and industrial wastes | |
| Riso et al. | Determination of dissolved iron (III) in estuarine and coastal waters by adsorptive stripping chronopotentiometry (SCP) | |
| EP1762843A1 (en) | Metal indicator | |
| Sharma et al. | Quantitative determination and removal of zinc using disposable colorimetric sensors: An appropriate alternative to optodes | |
| Takahashi | Dye nanoparticle-coated test strips for detection of ppb-level ions in water |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |