CN113884458A - A method for detecting mercury ions based on green synthetic silver nanoparticles - Google Patents
A method for detecting mercury ions based on green synthetic silver nanoparticles Download PDFInfo
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- CN113884458A CN113884458A CN202010629268.7A CN202010629268A CN113884458A CN 113884458 A CN113884458 A CN 113884458A CN 202010629268 A CN202010629268 A CN 202010629268A CN 113884458 A CN113884458 A CN 113884458A
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- 229910052753 mercury Inorganic materials 0.000 title claims abstract description 36
- -1 mercury ions Chemical class 0.000 title claims abstract description 35
- FOIXSVOLVBLSDH-UHFFFAOYSA-N Silver ion Chemical compound [Ag+] FOIXSVOLVBLSDH-UHFFFAOYSA-N 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000002835 absorbance Methods 0.000 claims abstract description 18
- 238000001514 detection method Methods 0.000 claims abstract description 14
- 239000002245 particle Substances 0.000 claims abstract description 10
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 6
- 238000003786 synthesis reaction Methods 0.000 claims abstract description 6
- BQPIGGFYSBELGY-UHFFFAOYSA-N mercury(2+) Chemical compound [Hg+2] BQPIGGFYSBELGY-UHFFFAOYSA-N 0.000 claims description 9
- 238000010521 absorption reaction Methods 0.000 claims description 5
- 238000004737 colorimetric analysis Methods 0.000 claims description 2
- 238000007865 diluting Methods 0.000 claims description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 10
- 239000000243 solution Substances 0.000 description 9
- 229920005610 lignin Polymers 0.000 description 6
- CIWBSHSKHKDKBQ-JLAZNSOCSA-N Ascorbic acid Chemical compound OC[C@H](O)[C@H]1OC(=O)C(O)=C1O CIWBSHSKHKDKBQ-JLAZNSOCSA-N 0.000 description 4
- 239000002105 nanoparticle Substances 0.000 description 4
- 239000000523 sample Substances 0.000 description 4
- 229910052709 silver Inorganic materials 0.000 description 4
- 239000004332 silver Substances 0.000 description 4
- 238000011160 research Methods 0.000 description 3
- 239000012086 standard solution Substances 0.000 description 3
- 229960005070 ascorbic acid Drugs 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- SQGYOTSLMSWVJD-UHFFFAOYSA-N silver(1+) nitrate Chemical compound [Ag+].[O-]N(=O)=O SQGYOTSLMSWVJD-UHFFFAOYSA-N 0.000 description 2
- 229920005552 sodium lignosulfonate Polymers 0.000 description 2
- 239000003381 stabilizer Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 235000000069 L-ascorbic acid Nutrition 0.000 description 1
- 239000002211 L-ascorbic acid Substances 0.000 description 1
- 208000008763 Mercury poisoning Diseases 0.000 description 1
- 206010027439 Metal poisoning Diseases 0.000 description 1
- 208000005374 Poisoning Diseases 0.000 description 1
- 235000010323 ascorbic acid Nutrition 0.000 description 1
- 239000011668 ascorbic acid Substances 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002848 electrochemical method Methods 0.000 description 1
- 238000000705 flame atomic absorption spectrometry Methods 0.000 description 1
- 239000007850 fluorescent dye Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910017053 inorganic salt Inorganic materials 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 238000003760 magnetic stirring Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 239000002114 nanocomposite Substances 0.000 description 1
- 238000007709 nanocrystallization Methods 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000008213 purified water Substances 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 229910001961 silver nitrate Inorganic materials 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 238000002371 ultraviolet--visible spectrum Methods 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
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/33—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using ultraviolet light
-
- 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
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- Chemical & Material Sciences (AREA)
- Pathology (AREA)
- General Health & Medical Sciences (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- Immunology (AREA)
- General Physics & Mathematics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The invention relates to a method for detecting mercury ions by nano silver particles based on green synthesis. The mercury ions added into the silver nano particles can cause the reduction of the absorbance, and the absorbance is in a linear relation with the increase of the added concentration, the detection range is 0-6800mM, and the minimum detection limit is 5 nM. The method provided by the invention can accurately and quickly detect the content of mercury ions.
Description
Technical Field
The invention belongs to the field of application of nano materials, and particularly relates to a method for detecting mercury ions by green synthesized nano silver particles.
Background
The lignin is a three-dimensional reticular high molecular polymer with a complex amorphous structure, and not only serves as a stabilizer and a reducing agent in the synthesis process, but also can enhance the functionality of the composite material. Because the application range of the lignin is limited by the characteristic of the amorphous structure of the lignin, the lignin is subjected to nanocrystallization or prepared into different nanocomposite materials through a series of reactions, the application additional value of the lignin is improved to a certain extent, meanwhile, the lignin is used as the second most renewable resource second to the cellulose in reserve, and the research on the new application field becomes the key point of attention of domestic and foreign researchers. The invention selects sodium lignosulfonate as a green stabilizer and ascorbic acid as a green reducing agent to prepare a stable silver nanoparticle solution, so that the whole system can be stored for a long time.
The mercury ions are mercury elements existing in the form of inorganic salt, and are toxic to human bodies, and a large number of researches show that Hg is a rare earth element2+Has irreversible damage to various organs of human body, Hg2+The initial stage of the poisoning has strong concealment and is difficult to detect, and many mercury poisoning patients lack a quick response detection method, so that a convenient and quick Hg is established2+The detection method has great research value. Hg reported at present2+The detection methods include flame atomic absorption spectrometry, fluorescent probe detection, electrochemical methods and the like, and the methods have the advantages of interference resistance, low detection limit and the like, but have the defects of high instrument price, complex sample pretreatment and the like. Compared with the prior art, the invention has the characteristics of quick response, low cost and zero pollution, and reduces Hg to a certain extent2+Time cost and economic cost of detection for detecting Hg2+A new solution is provided.
Disclosure of Invention
The invention provides a simple and accurate method for detecting mercury ions based on green synthesis nano silver particles, which is used for detecting mercury ions in an actual sample and proves that the method is intuitive and has strong operability.
A method for detecting mercury ions based on green synthesized nano silver particles comprises the following specific steps:
and detecting the change of the absorbance of the silver nanoparticles by using an ultraviolet spectrophotometer. Measuring the absorbance of the silver nanoparticles under the maximum absorption wavelength of 425 nm, adding mercury ion solutions with different concentrations into the silver nanoparticles, measuring the absorbance of the silver nanoparticles containing mercury ions with different concentrations at the wavelength of 425 nm, and drawing a standard curve graph by taking the concentration of the mercury ions as a horizontal coordinate and the intensity of the absorbance as a vertical coordinate.
And (4) photographing the silver nanoparticle solution which is added with the mercury ions with different concentrations and used for drawing the standard curve in the sunlight, and judging the content of the mercury ions by a colorimetric method.
A method for detecting mercury ions based on green synthesized nano silver particles has high selectivity. Under the same conditions, usingInterfering ions (Cu) that may be present in the sample of water2+、Al3+、Ce3+、Cr6+、Zr4+、Na+、Ca2+、Pb2+、Ni+、Mn2 +、K+、Fe2+、Zn2+、La3+、Mg2+) The obvious absorbance change of the silver nanoparticles is not caused when the silver nanoparticles are added into the silver nanoparticle solution, which shows that the method has high selectivity for detecting mercury ions.
And (3) diluting the concentration of the silver nanoparticles until the signal-to-noise ratio of detection is 3, adding mercury ion standard solutions with different concentrations, and determining that the minimum detection limit of mercury ions detected by the silver nanoparticles is 5 nM.
Drawings
FIG. 1 is a schematic diagram of detection of mercury ions by silver nanoparticles.
FIG. 2 is a graph of the ultraviolet-visible spectrum of silver nanoparticles with added mercury ions.
FIG. 3 is a linear graph of mercury ion detection by silver nanoparticles.
FIG. 4 is a color chart of silver nanoparticles added with mercury ions.
Detailed Description
Example 1.
The embodiments of the present invention will be described in detail below. It should be emphasized that the following description of the embodiments is merely exemplary and is not intended to limit the scope and application of the present invention.
A method for detecting mercury ions by nano silver particles based on green synthesis comprises the following specific operation steps:
after 0.3g of sodium lignosulfonate, which was weighed, was added to a 250mL round bottom flask, 30mL of purified water was added and magnetic stirring was performed at room temperature for 3 min. Then, 30mL of a 0.01mol/L silver nitrate solution was added to the round-bottomed flask while maintaining the temperature at 37 ℃. + -. 1 ℃ and then 30mL of a 0.0057mol/L ascorbic acid solution was added thereto, and after magnetically stirring for 5 hours, the heating was stopped and the sample was stored at 4 ℃.
Adding mercury ion standard solutions with different concentrations into a silver nanoparticle solution, measuring the absorbance of the silver nanoparticles under the maximum absorption wavelength of 425 nm, adding mercury ion solutions with different concentrations into the silver nanoparticles, measuring the absorbance of the silver nanoparticles containing mercury ions with different concentrations at the wavelength of 425 nm, and drawing a standard curve graph by taking the concentration of the mercury ions as an abscissa and the intensity change value of the absorbance as an ordinate. The linear relationship between the absorbance value of the silver nanoparticles and the concentration of the mercury ions after the addition of the mercury ion standard solution is calculated and divided into two sections (y =0.00956x +0.68968, R = 0.99165; y =0.00203x +0.49987, R = 0.99698).
Claims (2)
1. A method for detecting mercury ions by nano silver particles based on green synthesis is characterized in that the mercury ions are added into silver nano particles to cause the reduction of the absorbance of the silver nano particles, and the mercury ions are in a linear relation with the increase of the added concentration, so that the method for detecting the mercury ions by the nano silver particles is established;
the method comprises the following specific steps:
measuring the absorbance of the silver nanoparticles at the maximum absorption wavelength of 425 nm, recording the absorbance as A, adding mercury ion solutions with different concentrations into the silver nanoparticles, measuring the absorbance change of the silver nanoparticles containing mercury ions with different concentrations at the maximum absorption wavelength of 425 nm, and drawing a standard curve graph, wherein the concentration of the mercury ions is an abscissa and the absorbance is an ordinate;
diluting a sample to be detected, adding the sample to be detected into the silver nanoparticles, detecting the absorbance under the maximum absorption wavelength, substituting the absorbance into a standard curve, and calculating the content of mercury ions in the sample to be detected;
the detection range of the mercury ions is 0-6800 mM;
the minimum detection limit for mercury ions was 5 nM.
2. The method for detecting mercury ions based on green synthesized nano silver particles as claimed in claim 1, wherein the method comprises the following steps: the mercury ions were analyzed qualitatively using a colorimetric method.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010629268.7A CN113884458A (en) | 2020-07-03 | 2020-07-03 | A method for detecting mercury ions based on green synthetic silver nanoparticles |
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| CN202010629268.7A CN113884458A (en) | 2020-07-03 | 2020-07-03 | A method for detecting mercury ions based on green synthetic silver nanoparticles |
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| CN202010629268.7A Pending CN113884458A (en) | 2020-07-03 | 2020-07-03 | A method for detecting mercury ions based on green synthetic silver nanoparticles |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114527094A (en) * | 2022-03-03 | 2022-05-24 | 常州大学 | Method for detecting mercury ions based on triangular silver nanosheets |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102489716A (en) * | 2011-12-15 | 2012-06-13 | 湖南科技大学 | Preparation method for lignosulfonate nano-silver colloid |
| KR101496677B1 (en) * | 2013-08-22 | 2015-03-02 | 고려대학교 산학협력단 | Colorimetric detection of mercury ion using nanogolds |
| CN109030473A (en) * | 2018-06-13 | 2018-12-18 | 盐城工学院 | Utilize the method for Nano silver grain detection mercury ion |
-
2020
- 2020-07-03 CN CN202010629268.7A patent/CN113884458A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102489716A (en) * | 2011-12-15 | 2012-06-13 | 湖南科技大学 | Preparation method for lignosulfonate nano-silver colloid |
| KR101496677B1 (en) * | 2013-08-22 | 2015-03-02 | 고려대학교 산학협력단 | Colorimetric detection of mercury ion using nanogolds |
| CN109030473A (en) * | 2018-06-13 | 2018-12-18 | 盐城工学院 | Utilize the method for Nano silver grain detection mercury ion |
Non-Patent Citations (1)
| Title |
|---|
| 李红红 等: ""纳米金银材料在比色检测汞中的应用", 岩矿测试, vol. 31, no. 5, pages 757 - 766 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114527094A (en) * | 2022-03-03 | 2022-05-24 | 常州大学 | Method for detecting mercury ions based on triangular silver nanosheets |
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