CN104330364A - Colorimetric detection method of iodide ions - Google Patents
Colorimetric detection method of iodide ions Download PDFInfo
- Publication number
- CN104330364A CN104330364A CN201410660702.2A CN201410660702A CN104330364A CN 104330364 A CN104330364 A CN 104330364A CN 201410660702 A CN201410660702 A CN 201410660702A CN 104330364 A CN104330364 A CN 104330364A
- Authority
- CN
- China
- Prior art keywords
- solution
- iodide ion
- colorimetric detection
- water
- core
- 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.)
- Pending
Links
Landscapes
- Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)
Abstract
The invention provides a colorimetric detection method of iodide ions and relates to iodide ion detection. The colorimetric detection method of the iodide ions comprises the following steps: dissolving HAuCl4 in water to prepare a HAuCl4 solution, and heating the HAuCl4 solution until boiling to obtain a solution A; dissolving sodium citrate in water and heating the solution until boiling to obtain a solution B; mixing the solution A with the solution B, heating the mixed solution so that the solution turns to wine red from light yellow, cooling until the temperature reaches a room temperature, thereby obtaining a gold nanoparticle solution, adding water to the gold nanoparticle solution and then orderly adding a silver-ammonia solution and formaldehyde to generate a reaction until the solution turns to yellow, thereby obtaining a gold-core and silver-shell nanoparticle solution; mixing the gold-core and silver-shell nanoparticle solution with a copper ion solution and applying to the mixed solution to the colorimetric detection of iodide ions. The colorimetric detection method of the iodide ions based on the gold-core and silver-shell nanoparticles and the copper ions as probes has the advantages of simplicity and convenience in operation, high reaction speed, high sensitivity, good specificity, fast semi-quantitative determination achievable by use of color change on the concentration of the iodide ions, and the like.
Description
Technical field
The present invention relates to iodide ion to detect, especially relate to a kind of method of colorimetric detection iodide ion.
Background technology
Thyroid hormone has very important effect in regulating cell metabolism, neuro-muscular organizational development and growth (brain development of the fetus that is especially born grows) etc., and iodide ion is a kind of necessary trace element [Zimmermann of synthetic thyroid hormone, M.B., 2011.Seminars in Cell & Developmental Biology 22,645-652].Iodine deficiency or excessive iodine all can cause great infringement to health.Such as iodine deficiency can cause the rising of premature labor in pregnant women, fetal mortality, mental deficiency.Excessive iodine can cause again hyperthyroidism [Zimmermann, M.B., Jooste, P.L., Pandaw, C.S., 2008.Lancet 372,1251-1262; Pearce, E.N., 2012.Journal of Trace Elements in Medicine and Biology 26,131-133].Therefore a kind of analytical approach that can detect iodide ion content in biology, environment and food in real time, is rapidly set up significant and urgent.
The method of traditional detection iodide ion has electrochemical process, vapor-phase chromatography, atomic absorption spectrography (AAS), capillary electrophoresis etc.Although these methods are reliable, sensitive, the large-scale instrument of the pretreatment process that general needs are complicated and costliness, is difficult to the quick detection realizing iodide ion.Visual colorimetry realizes a kind of important means that iodide ion detects fast.Gold, silver nano particle makes it present different colors in aqueous due to surface plasma resonance, and this color is relevant with existence with the particle diameter of nano particle.What is more important, gold, silver nano particle has the molar absorptivity of 2 ~ 3 orders of magnitude higher than conventional organic dyestuff.In recent years, the surface plasmon absorption based on gold, silver nano particle has established a series of sensing about iodide ion and analytical approach.(J.M.Liu,J.Jiao,M.L.Cui,L.P.Lin,X.X.Wang,Z.Y.Zheng,L.H.Zhang,S.L.Jiang,Sensors and Actuators B 188(2013)644；J.Zhang,X.W.Xu,C.Yang,F.Yang,X.R.Yang,Analytical Chemistry83(2011)3911；L.Chen,W.H.Lu,X.K.Wang,L.X.Chen,Sensors and Actuators B:Chemical 182(2013)482.)。All by the half-quantitative detection of color change realization to iodide ion, but there is reaction time length in various degree, need the shortcoming such as poisonous auxiliary reagent or detectability height in these methods.
Summary of the invention
The object of the invention is to for the reaction time existing for existing iodide ion colorimetric detection method is long, required reagent is poisonous, the high deficiency of detection limit, utilize Au core-Ag shell nanoparticle and copper ion to be probe, provide a kind of and have that easy and simple to handle, reaction velocity is fast, the iodide ion colorimetric detection method of sensitivity advantages of higher.
The method of described a kind of colorimetric detection iodide ion, comprises the following steps:
1) solution of gold nanoparticles is prepared: by HAuCl
4be dissolved in water, be made into HAuCl
4solution, is heated to solution A of seething with excitement to obtain; Separately sodium citrate is dissolved in water, is heated to solution B of seething with excitement to obtain; Again by solution A and solution B mixing, after heating, solution becomes claret from light yellow, is cooled to room temperature, obtains solution of gold nanoparticles;
2) Au core-Ag shell nanoparticle solution is prepared: by step 1) solution of gold nanoparticles that obtains adds water, then adds silver ammino solution and formaldehyde successively, and after reaction, solution becomes yellow, obtains Au core-Ag shell nanoparticle solution;
3) preparation detects liquid: by step 2) the Au core-Ag shell nanoparticle solution prepared and copper ion solution mixing;
4) by step 3) the detection liquid prepared is applied to the colorimetric detection of iodide ion, and concrete grammar is as follows:
(1) get the iodide ion standard solution of concentration known, add isopyknic detection liquid, after making all mixed solutions react, by the color of digital camera shooting solution, production standard colorimetric card; Meanwhile, utilize spectrophotometer to scan the ultraviolet-visible spectrum of above-mentioned mixed solution, with absorbance changing value for ordinate, the concentration of iodide ion is horizontal ordinate, and drawing curve, obtains linear equation with one unknown;
(2) get liquid to be checked, add isopyknic detection liquid, after mixed solution is reacted, take solution colour with digital camera, the color of solution in this photo and standard color comparison card are contrasted, half-quantitative detection can be carried out to the iodide ion content in liquid to be checked; Meanwhile, the ultraviolet-visible spectrum of scanning mixed solution obtains absorbance changing value, substitutes into the linear equation with one unknown in step (1), can try to achieve the concentration of iodide ion.
In step 1) in, described HAuCl
4, water proportioning can be 0.41mg: 100mL, described HAuCl
4, sodium citrate proportioning can be 0.41mg: 114mg, the proportioning of described sodium citrate, water can be 114mg: 100mL, wherein, HAuCl
4, sodium citrate calculates in mass, water is calculated by volume; Described water can adopt ultrapure water; The time of described heating can be 10 ~ 20min; Gained golden nanometer particle is the golden nanometer particle of diameter 11 ~ 14nm.
In step 2) in, described solution of gold nanoparticles, water, silver ammino solution, formaldehyde can be (200 ~ 400) by volume: (444 ~ 644): (40 ~ 80): (60 ~ 120); Described water can adopt ultrapure water; Described silver ammino solution can adopt volumetric molar concentration to be the silver ammino solution of 0.024 ~ 0.048M; Described formaldehyde can adopt volumetric molar concentration to be the formaldehyde of 0.01 ~ 0.05M; The time of described reaction can be 20 ~ 40min; The particle diameter of obtained Au core-Ag shell nanoparticle is 13.6 ~ 28.8nm.
In step 3) in, the volume ratio of described Au core-Ag shell nanoparticle solution and copper ion solution can be 24: 1, and described copper ion solution volumetric molar concentration can be 0.01M.
In step 4) in (1) part, the iodide ion standard solution of described concentration known can adopt concentration to be respectively each 500 μ L of iodide ion standard solution of 5,25,50,80,100,200,400 μMs; The time of described reaction can be 5 ~ 15min; Described absorbance changing value can adopt the absorbance changing value at 394nm place.
In step 4) in (2) part, the addition of described liquid to be checked can be 500 μ L; The time of described mixed solution reaction can be 5 ~ 15min; Described absorbance changing value can adopt the absorbance changing value at 394nm place.
The invention solves the problems such as the reaction time is grown, required reagent is poisonous, detection limit is high existing for existing iodide ion colorimetric detection method, Au core-Ag shell nanoparticle and copper ion is utilized to be probe, based on the method for the colorimetric detection iodide ion of Au core-Ag shell nanoparticle and copper ion, have easy and simple to handle, reaction velocity is fast, highly sensitive, specificity good, can be realized advantages such as the rapid semi-quantitative detections of iodide ion concentration by color change.
Accompanying drawing explanation
Fig. 1 is the principle schematic of Au core-Ag shell nanoparticle of the present invention and copper ion colorimetric detection iodide ion.
Fig. 2 is the transmission electron microscope picture of (a ~ c) (e ~ f) afterwards before Au core-Ag shell nanoparticle of the present invention and copper ion and iodide ion react.
Fig. 3 is the X-ray diffractogram of (a) (b) afterwards before Au core-Ag shell nanoparticle of the present invention reacts with iodide ion under the effect of copper ion.
Fig. 4 is the photo that Au core-Ag shell nanoparticle of the present invention and copper ion embodiment detect variable concentrations iodide ion.
Fig. 5 is the ultraviolet-visible scanning optical spectrum that Au core-Ag shell nanoparticle of the present invention and copper ion embodiment detect variable concentrations iodide ion.
Fig. 6 is that Au core-Ag shell nanoparticle of the present invention and copper ion embodiment detect the 394nm place absorbance changing value of variable concentrations iodide ion and the linear relationship curve map of iodide ion concentration.
Fig. 7 is the response time curve that Au core-Ag shell nanoparticle of the present invention and copper ion embodiment detect variable concentrations iodide ion.
Fig. 8 is Au core-Ag shell nanoparticle of the present invention and copper ion embodiment to the response effectiveness comparison figure of 17 kinds of negative ion of iodide ion and other type.
Embodiment
Following examples will the present invention is further illustrated by reference to the accompanying drawings.
Fig. 1 provides the principle schematic of Au core-Ag shell nanoparticle of the present invention colorimetric detection iodide ion under the effect of copper ion.The color of the Au core-Ag shell nanoparticle solution prepared by the present invention is yellow.When in the mixed solution that iodide ion is exposed to Au core-Ag shell nanoparticle and copper ion, first iodide ion is oxidized to elemental iodine (Cu by copper ion
2++ I
-=CuI+I
2), the silver-colored shell in golden core silver shell is oxidized to silver iodide (I by elemental iodine further
2+ Ag=2AgI), the color of solution gradually becomes aubergine, along with iodide ion concentration improves, silver iodide shell is thickening gradually, the color of solution becomes darkviolet further, and the change of this serial solution color is proportionate with iodide ion concentration, can be used for the semiquantitative determination of iodide ion concentration.
Fig. 2 provides Au core-Ag shell nanoparticle of the present invention reacts front and back under the effect of copper ion transmission electron microscope picture with iodide ion; Fig. 3 provides Au core-Ag shell nanoparticle of the present invention reacts front and back under the effect of copper ion X-ray characterization result with iodide ion.As shown in the figure a ~ c in Fig. 2, before reaction, most of nano particle is spherical in shape, and the electron density of nucleocapsid part is uneven, and the color of its center is comparatively dark and the color of shell is more shallow, illustrates that the nano particle of synthesis has nucleocapsid structure.Figure d ~ f in Fig. 2 shows, after reaction, and the irregular pastel of most nano particle shell surface coverage last layer.X-ray characterization result (Fig. 3) shows, compared to reaction before (see Fig. 3 curve a), after reacting (see Fig. 3 curve b), the diffraction peak not only belonging to (200) and (111) crystal face of silver declines, and there is (110) (200) diffraction peak belonging to hexagonal structure silver iodide, define silver iodide solid after describing reaction.
Embodiment 1:
Below provide Au core-Ag shell nanoparticle of the present invention and copper ion to the Detection results of series concentration iodide ion solution.Prepare the iodide ion solution (0 ~ 400 μM) of a series of concentration, add the mixed solution of Au core-Ag shell nanoparticle and copper ion, carry out after reacting 15min under room temperature taking pictures and scanning ultraviolet-visible spectrum.Fig. 4 shows, along with the increase of iodide ion concentration, solution colour becomes redness from yellow, finally becomes purple, changes the half-quantitative detection that can realize iodide ion concentration according to color.Fig. 5 shows, along with iodide ion concentration improves, the absorbance of 394nm reduces gradually, and the changing value of absorbance and iodide ion concentration are good linear relationship (Fig. 6) within the scope of 0 ~ 80 μM, linearly dependent coefficient reaches 0.9932, minimal detectable concentration is 0.5 μM, illustrates that this method can be used for the quantitative detection of iodide ion.
Embodiment 2:
Below provide the response time curve that the method for the invention detects variable concentrations iodide ion.The iodide ion solution of preparation variable concentrations, adds the mixed solution of Au core-Ag shell nanoparticle and copper ion respectively, at room temperature adopts spectrophotometer monitoring 394nm absorbance changing value and the relation curve in reaction time.As shown in Figure 7, when golden core silver shell Nano sol is exposed to iodide ion environment, the absorbance at 394nm place significantly declines in 1min, tends to balance after 5min, and the advantage utilizing Au core-Ag shell nanoparticle of the present invention detection iodide ion to have fast response time is described.
Embodiment 3:
Below provide Au core-Ag shell nanoparticle of the present invention and the copper ion embodiment response effectiveness comparison to 17 kinds of negative ion of iodide ion and other type.Fig. 8 shows, the response signal of Au core-Ag shell nanoparticle of the present invention to iodide ion is 9 ~ 154.5 times of other all 17 kinds of negative ion, illustrates that this method has very high specificity to iodide ion.
Embodiment 4:
Below provide the kelp extract sample of Au core-Ag shell nanoparticle of the present invention and copper ion embodiment detection reality.In order to check this method feasibility that iodide ion detects in actual sample, be applied to the detection of iodide ion in kelp extract, result is 54.8 μMs, and the content being scaled iodine in sea-tangle is 1.16mg/g.In kelp extract, add certain density iodide ion, do mark-on and reclaim test, spiked levels is respectively 8,20,50 μMs.As shown in table 1, recovery of standard addition, between 88.1% ~ 92.3%, illustrates that the method set up can meet the testing requirement of iodide ion in sea-tangle liquid.
In table 1 sea-tangle liquid, the mensuration of iodide ion content and mark-on reclaim test
The method of the colorimetric detection iodide ion based on Au core-Ag shell nanoparticle and copper ion proposed by the invention has that reaction velocity is fast, highly sensitive, specificity is good, can be realized advantages such as the rapid semi-quantitative detections of iodide ion concentration by color change.
Claims (10)
1. a method for colorimetric detection iodide ion, is characterized in that comprising the following steps:
1) solution of gold nanoparticles is prepared: by HAuCl
4be dissolved in water, be made into HAuCl
4solution, is heated to solution A of seething with excitement to obtain; Separately sodium citrate is dissolved in water, is heated to solution B of seething with excitement to obtain; Again by solution A and solution B mixing, after heating, solution becomes claret from light yellow, is cooled to room temperature, obtains solution of gold nanoparticles;
2) Au core-Ag shell nanoparticle solution is prepared: by step 1) solution of gold nanoparticles that obtains adds water, then adds silver ammino solution and formaldehyde successively, and after reaction, solution becomes yellow, obtains Au core-Ag shell nanoparticle solution;
3) preparation detects liquid: by step 2) the Au core-Ag shell nanoparticle solution prepared and copper ion solution mixing;
4) by step 3) the detection liquid prepared is applied to the colorimetric detection of iodide ion, and concrete grammar is as follows:
(1) get the iodide ion standard solution of concentration known, add isopyknic detection liquid, after making all mixed solutions react, by the color of digital camera shooting solution, production standard colorimetric card; Meanwhile, utilize spectrophotometer to scan the ultraviolet-visible spectrum of above-mentioned mixed solution, with absorbance changing value for ordinate, the concentration of iodide ion is horizontal ordinate, and drawing curve, obtains linear equation with one unknown;
(2) get liquid to be checked, add isopyknic detection liquid, after mixed solution is reacted, take solution colour with digital camera, the color of solution in this photo and standard color comparison card are contrasted, half-quantitative detection can be carried out to the iodide ion content in liquid to be checked; Meanwhile, the ultraviolet-visible spectrum of scanning mixed solution obtains absorbance changing value, substitutes into the linear equation with one unknown in step (1), can try to achieve the concentration of iodide ion.
2. the method for a kind of colorimetric detection iodide ion as claimed in claim 1, is characterized in that in step 1) in, described HAuCl
4, water proportioning be 0.41mg: 100mL, described HAuCl
4, sodium citrate proportioning be 0.41mg: 114mg, the proportioning of described sodium citrate, water is 114mg: 100mL, wherein, HAuCl
4, sodium citrate calculates in mass, water is calculated by volume; Described water can adopt ultrapure water.
3. the method for a kind of colorimetric detection iodide ion as claimed in claim 1, is characterized in that in step 1) in, the time of described heating is 10 ~ 20min; Gained golden nanometer particle is the golden nanometer particle of diameter 11 ~ 14nm.
4. the method for a kind of colorimetric detection iodide ion as claimed in claim 1, it is characterized in that in step 2) in, described solution of gold nanoparticles, water, silver ammino solution, formaldehyde are (200 ~ 400) by volume: (444 ~ 644): (40 ~ 80): (60 ~ 120); Described water can adopt ultrapure water; Described silver ammino solution can adopt volumetric molar concentration to be the silver ammino solution of 0.024 ~ 0.048M; Described formaldehyde can adopt volumetric molar concentration to be the formaldehyde of 0.01 ~ 0.05M.
5. the method for a kind of colorimetric detection iodide ion as claimed in claim 1, is characterized in that in step 2) in, the time of described reaction is 20 ~ 40min; The particle diameter of obtained Au core-Ag shell nanoparticle is 13.6 ~ 28.8nm.
6. the method for a kind of colorimetric detection iodide ion as claimed in claim 1, is characterized in that in step 3) in, the volume ratio of described Au core-Ag shell nanoparticle solution and copper ion solution is 24: 1, and described copper ion solution volumetric molar concentration can be 0.01M.
7. the method for a kind of colorimetric detection iodide ion as claimed in claim 1, it is characterized in that in step 4) in (1) part, the iodide ion standard solution of described concentration known adopts concentration to be respectively each 500 μ L of iodide ion standard solution of 5,25,50,80,100,200,400 μMs.
8. the method for a kind of colorimetric detection iodide ion as claimed in claim 1, is characterized in that in step 4) in (1) part, the time of described reaction is 5 ~ 15min; Described absorbance changing value can adopt the absorbance changing value at 394nm place.
9. the method for a kind of colorimetric detection iodide ion as claimed in claim 1, is characterized in that in step 4) in (2) part, the addition of described liquid to be checked can be 500 μ L.
10. the method for a kind of colorimetric detection iodide ion as claimed in claim 1, is characterized in that in step 4) in (2) part, the time of described mixed solution reaction is 5 ~ 15min; Described absorbance changing value can adopt the absorbance changing value at 394nm place.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410660702.2A CN104330364A (en) | 2014-11-18 | 2014-11-18 | Colorimetric detection method of iodide ions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410660702.2A CN104330364A (en) | 2014-11-18 | 2014-11-18 | Colorimetric detection method of iodide ions |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104330364A true CN104330364A (en) | 2015-02-04 |
Family
ID=52405134
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410660702.2A Pending CN104330364A (en) | 2014-11-18 | 2014-11-18 | Colorimetric detection method of iodide ions |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104330364A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN105598442A (en) * | 2016-02-25 | 2016-05-25 | 天津工业大学 | One-dimensional chainlike Au-Ag core-shell nanostructure, self-assembly preparing method and SERS application |
| CN106404766A (en) * | 2016-08-30 | 2017-02-15 | 中南林业科技大学 | Preparation method of nanogold colorimetric probe and method for detecting iodide ions by using nanogold colorimetric probe |
| CN109142344A (en) * | 2018-09-19 | 2019-01-04 | 南昌航空大学 | A kind of method and device of field quick detection dispersion total Iron in Drinking Water content |
| CN110006857A (en) * | 2019-04-18 | 2019-07-12 | 桂林理工大学 | A kind of iodide ion quantifies instant detection technique |
-
2014
- 2014-11-18 CN CN201410660702.2A patent/CN104330364A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN105598442A (en) * | 2016-02-25 | 2016-05-25 | 天津工业大学 | One-dimensional chainlike Au-Ag core-shell nanostructure, self-assembly preparing method and SERS application |
| CN106404766A (en) * | 2016-08-30 | 2017-02-15 | 中南林业科技大学 | Preparation method of nanogold colorimetric probe and method for detecting iodide ions by using nanogold colorimetric probe |
| CN109142344A (en) * | 2018-09-19 | 2019-01-04 | 南昌航空大学 | A kind of method and device of field quick detection dispersion total Iron in Drinking Water content |
| CN110006857A (en) * | 2019-04-18 | 2019-07-12 | 桂林理工大学 | A kind of iodide ion quantifies instant detection technique |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104096849B (en) | The preparation method of gold core silver shell nano-probe and the application in cyanide ion colorimetric detection thereof | |
| Zeng et al. | Au@ Ag core/shell nanoparticles as colorimetric probes for cyanide sensing | |
| CN104330364A (en) | Colorimetric detection method of iodide ions | |
| Zeng et al. | A colorimetric assay for measuring iodide using Au@ Ag core–shell nanoparticles coupled with Cu2+ | |
| Zeng et al. | A colorimetric agarose gel for formaldehyde measurement based on nanotechnology involving Tollens reaction | |
| LingáZheng et al. | HSI colour-coded analysis of scattered light of single plasmonic nanoparticles | |
| CN103411962B (en) | A kind of cobalt ions colorimetric determination kit and detection method thereof | |
| Lin et al. | Determination of iron in seawater: from the laboratory to in situ measurements | |
| CN101936905A (en) | Mercury ion detection reagent and detection method | |
| Liang et al. | Arsenazo III-functionalized gold nanoparticles for photometric determination of uranyl ion | |
| CN103743735B (en) | A kind of colorimetric determination, enrichment and be separated the method for water surrounding heavy metal Hg2+ | |
| CN104597258A (en) | Method for detecting 17beta-estradiol by employing colorimetric method based on nucleic acid aptamer | |
| CN104502614A (en) | Analogue enzyme reagent box based on gold nanometer cluster, and preparation method and application thereof | |
| CN106198473B (en) | Ratio-type 3-dimensional metal enhances fluorescence Pb2+The structure of biosensor | |
| CN105044092A (en) | Colorimetric detection method for Hg<2+> on basis of gold nanoparticle-thiourea | |
| Wang et al. | Recent developments of the speciation analysis methods for silver nanoparticles and silver ions based on atomic spectrometry | |
| Wen et al. | Matrix colorimetry for high-resolution visual detection of free cyanide with Au@ Au–Ag yolk–Shell nanoparticles | |
| Villarino et al. | Waterproof cellulose-based substrates for in-drop plasmonic colorimetric sensing of volatiles: application to acid-labile sulfide determination in waters | |
| CN113059175B (en) | Preparation method of Au @ Ag @ AgCl nanoparticles and application of Au @ Ag @ AgCl nanoparticles in ammonia gas colorimetric detection | |
| CN110954526A (en) | Rapid detection method for trace mercury ions | |
| Zhou et al. | A convenient and sensitive colorimetric iodide assay based on directly inducing morphological transformation of gold nanostars | |
| Mahmoudian et al. | Ultra-trace determination of cadmium in water and food samples by a thin-film microextraction using a supported liquid membrane combined with smartphone-based colorimetric detection | |
| Garg et al. | ArsenazoIII functionalized gold nanoparticles: SPR based optical sensor for determination of uranyl ions (UO22+) in groundwater | |
| CN104181154B (en) | Formaldehyde detection agent and method | |
| Dakova et al. | Solid phase extraction and diffusive gradients in thin films techniques for determination of total and labile concentrations of Cd (II), Cu (II), Ni (II) and Pb (II) in Black Sea water |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150204 |