CN102183516B - Nano gold colorimetric method for simply and cheaply detecting mercury ions - Google Patents
Nano gold colorimetric method for simply and cheaply detecting mercury ions Download PDFInfo
- Publication number
- CN102183516B CN102183516B CN201110052259.7A CN201110052259A CN102183516B CN 102183516 B CN102183516 B CN 102183516B CN 201110052259 A CN201110052259 A CN 201110052259A CN 102183516 B CN102183516 B CN 102183516B
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- CN
- China
- Prior art keywords
- solution
- gold
- mercury ion
- mercury
- pyridine
- Prior art date
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- 239000010931 gold Substances 0.000 title claims abstract description 33
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 title claims abstract description 23
- 229910052737 gold Inorganic materials 0.000 title claims abstract description 23
- 229910052753 mercury Inorganic materials 0.000 title claims abstract description 12
- 238000004737 colorimetric analysis Methods 0.000 title claims abstract description 10
- -1 mercury ions Chemical class 0.000 title abstract 3
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 claims abstract description 26
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 claims abstract description 10
- BQPIGGFYSBELGY-UHFFFAOYSA-N mercury(2+) Chemical compound [Hg+2] BQPIGGFYSBELGY-UHFFFAOYSA-N 0.000 claims description 20
- 238000001514 detection method Methods 0.000 claims description 9
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 claims description 9
- 239000001509 sodium citrate Substances 0.000 claims description 6
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical compound O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 claims description 6
- 238000002371 ultraviolet--visible spectrum Methods 0.000 claims description 6
- FDWREHZXQUYJFJ-UHFFFAOYSA-M gold monochloride Chemical compound [Cl-].[Au+] FDWREHZXQUYJFJ-UHFFFAOYSA-M 0.000 claims description 3
- 238000002835 absorbance Methods 0.000 claims description 2
- 150000002500 ions Chemical class 0.000 claims description 2
- KWYUFKZDYYNOTN-UHFFFAOYSA-M potassium hydroxide Substances [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 5
- 239000007864 aqueous solution Substances 0.000 abstract description 2
- 238000004220 aggregation Methods 0.000 abstract 1
- 230000002776 aggregation Effects 0.000 abstract 1
- 230000031700 light absorption Effects 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 238000000862 absorption spectrum Methods 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000008236 heating water Substances 0.000 description 1
- 238000004128 high performance liquid chromatography Methods 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 238000001095 inductively coupled plasma mass spectrometry Methods 0.000 description 1
- NICDRCVJGXLKSF-UHFFFAOYSA-N nitric acid;trihydrochloride Chemical compound Cl.Cl.Cl.O[N+]([O-])=O NICDRCVJGXLKSF-UHFFFAOYSA-N 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 238000006557 surface reaction Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
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- Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
Abstract
The invention discloses a colorimetric analysis method capable of simply detecting mercury ions in aqueous solution. By using the characteristic that the nano gold has high light absorption coefficient, the nano gold is used as a signal element; and by using the characteristics that pyridine can induce nano gold aggregation and can also form a complex together with the mercury ions, the pyridine is used as a specificity identification element. The developed colorimetric analysis method is simple in operation, and easy to obtain.
Description
Technical field
The invention belongs to the analytical chemistry field, be specifically related to a kind of use nm of gold as signal element, pyridine is as the chemical colorimetry of mercury ion in the detection aqueous solution of specific recognition element.
Background technology
Mercury is a kind of material that environment and human body is had very big harm.Mercury pollution is mainly from the waste water of the industrial discharges such as power plant, chlor-alkali, plastics, battery, electronics.Mercury has 3 kinds of valence states, and wherein Mercury in Water Body mainly exists with bivalent form.The at present detection of mercury mainly depends on analytical instrument, such as high performance liquid chromatography, inductively coupled plasma mass spectrometry and atomic absorption spectrum etc.
Nanogold particle refers to the gold grain of particle diameter between 1～100 nanometer.Often be dispersed in water formed aurosol with gold grain and use, so claim again collaurum or aurosol.In recent years, nanogold particle relies on its unique physicochemical characteristics as a kind of novel material, such as high-specific surface area, high surface reaction activity, strong adsorbability etc., all obtains to use widely in fields such as material science, clinical medicine, life sciences.The absorptivity of the gold grain of 13 nanometer diameters is 2.7 * 10
8M
-1Cm
-1, than traditional organic chromophores large 3 orders of magnitude.In addition, be dispersed in nm of gold in the solution after assembling mutually, color can become blueness from redness.Therefore, in colorimetric analysis, nm of gold is a kind of desirable color signal element.
Summary of the invention
The purpose of this invention is to provide a kind of simple colorimetric analysis for detection of mercury ion.The method uses pyridine as the specific recognition element of mercury ion, and nm of gold is as signal element.
Purpose of the present invention can reach by following measures:
A kind of nm of gold colourimetry of simple detection mercury ion comprises the steps:
Adopt the sodium citrate reducing process that gold chloride is reduced, make the claret nano-Au solution.Certain density mercury solution is joined in the nano-Au solution.Because the mercury concentration that adds is very low (less than 1mmol L
-1), the nm of gold color does not change.After continuing to add certain density pyridine solution in nano-Au solution, a part of pyridine and mercury ion generate complex, and remaining pyridine induced nano golden hair is given birth to and assembled, and causes solution colour to change.The variation of color is relevant with the concentration of mercury ion, therefore can be used in the dimercurion that detects in the water body.
Description of drawings
Fig. 1 is the transmission electron microscope picture of (a) 13nm nm of gold; (b) transmission electron microscope picture of 24nm nm of gold; (c) the projection Electronic Speculum figure after the 24nm nm of gold is assembled;
Fig. 2 is (a) nano-Au solution; (b) contain 30 μ mol L
-1The nano-Au solution of pyridine; (c) contain 30 μ mol L
-1Pyridine and 30 μ mol L
-1The uv-vis spectra of the nano-Au solution of mercury ion;
Fig. 3 is for containing respectively mercury ion (a) 0 μ mol L
-1(b) 0.15 μ mol L
-1(c) 0.20 μ mol L
-1(d) 0.40 μ mol L
-1(e) 0.60 μ mol L
-1(f) 1.00 μ mol L
-1(g) 2.00 μ mol L
-1(h) 2.50 μ mol L
-1(i) 3.50 μ mol L
-1The 24nm nano-Au solution in add 30 μ mol L
-1Uv-vis spectra behind the pyridine;
Fig. 4 is the typical curve of mercury ion.
Embodiment
(1) preparation of nm of gold
Nm of gold adopts sodium citrate reduction gold chloride method to make (seeing Fig. 1).At first, all glass apparatus all need to use chloroazotic acid to soak to remove reducing substances residual in the glass container.Accurately take by weighing HAuCl
4.4H
2Then O0.0123g adds 100mL water in the there-necked flask in the 250mL there-necked flask.Vigorous stirring, ebuillition of heated refluxes.Accurately take by weighing 2 hydration sodium citrate 0.2849g in the 25mL volumetric flask.Get a certain amount of sodium citrate solution, add fast flask behind the heating water bath to 50 ℃.Solution is claret to purple from colourless to light blue more at last after 15 minutes, continues to heat stopped heating after 10 minutes, continues to stir cool to room temperature after 10 minutes.The size of nm of gold is relevant with the amount of the sodium citrate of adding.
(2) detection of mercury ion
In nano-Au solution, add respectively first certain density mercury ion solution, and then add 30 μ mol L
-1Pyridine solution, the uv-vis spectra of detection solution obtains uv-vis spectra corresponding to variable concentrations mercury ion (seeing Fig. 3) after 10 minutes.Then use absorbance ratio E
525/ E
700As ordinate, ion concentration of mercury is drawn the typical curve (seeing Fig. 4) of mercury ion as horizontal ordinate.
Claims (2)
1. a simple nm of gold colourimetry that detects mercury ion is characterized in that its use nm of gold as signal element, and uses pyridine as the specific recognition element of mercury ion.
2. the nm of gold colourimetry of this simple detection mercury ion according to claim 1 is characterized in that its concrete steps are:
Adopt sodium citrate reduction gold chloride to make the claret nano-Au solution, in nano-Au solution, add respectively first certain density mercury ion solution, and then add 30 μ mol L
-1Pyridine solution, the uv-vis spectra of detection solution obtains uv-vis spectra corresponding to variable concentrations mercury ion after 10 minutes, then uses absorbance ratio E
525/ E
700As ordinate, ion concentration of mercury is horizontal ordinate, draws the typical curve of mercury ion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110052259.7A CN102183516B (en) | 2011-03-04 | 2011-03-04 | Nano gold colorimetric method for simply and cheaply detecting mercury ions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110052259.7A CN102183516B (en) | 2011-03-04 | 2011-03-04 | Nano gold colorimetric method for simply and cheaply detecting mercury ions |
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| Publication Number | Publication Date |
|---|---|
| CN102183516A CN102183516A (en) | 2011-09-14 |
| CN102183516B true CN102183516B (en) | 2013-01-16 |
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|---|---|---|---|
| CN201110052259.7A Expired - Fee Related CN102183516B (en) | 2011-03-04 | 2011-03-04 | Nano gold colorimetric method for simply and cheaply detecting mercury ions |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103323450B (en) * | 2013-06-01 | 2015-05-13 | 福建医科大学 | Rapid determination method of iodide ion by using nano-gold as logic gate developing probe |
| CN103743735B (en) * | 2013-12-31 | 2016-06-15 | 皖西学院 | A kind of colorimetric determination, enrichment and be separated the method for water surrounding heavy metal Hg2+ |
| CN105044092A (en) * | 2015-06-25 | 2015-11-11 | 中国石油大学(华东) | Colorimetric detection method for Hg<2+> on basis of gold nanoparticle-thiourea |
| CN106932389A (en) * | 2017-03-28 | 2017-07-07 | 桂林理工大学 | Nm of gold Two-dimensional Liquid without spectrometer compares color quantitative analysis method |
| CN115124715B (en) * | 2021-03-29 | 2023-09-26 | 华南理工大学 | Preparation method of pyridyl polythioamide |
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| JP4904490B2 (en) * | 2006-03-10 | 2012-03-28 | 国立大学法人北海道大学 | Nanoparticle compound, metal ion detection method and removal method using this compound |
| CN101713737A (en) * | 2009-12-29 | 2010-05-26 | 东北师范大学 | Fluorescent detection probe for mercury ions and application method thereof |
| CN101881734B (en) * | 2010-06-07 | 2012-02-01 | 中国科学院宁波材料技术与工程研究所 | Detection method of metal ions |
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