CN101949855B - Method for detecting metal cation by utilizing VA group or VIA group element compound - Google Patents
Method for detecting metal cation by utilizing VA group or VIA group element compound Download PDFInfo
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Abstract
The invention discloses a method for detecting a metal cation by utilizing a VA group or VIA group element compound. The VA group or VIA group element compound is utilized and interacts with the detected metal cation to form a core-shell structure on the surface of gold nanoparticles, wherein the gold nanoparticles are taken as the core, and the compound formed by interaction of the VA group or VIA group element compound and the detected metal cation is taken as the shell. The resonance absorption peak of the surface plasma of the gold nanoparticles is changed so that the color of the solution is changed, thus the change of the color of the solution can be directly distinguished by naked eyes or simple instruments and equipment to realize the purpose of quickly detecting the detected metal cation in the solution system. The method has the advantages of simple and convenient operation, low detection cost, high detection sensitivity, small sampling quantity and wide application range.
Description
Technical field
The present invention relates to the detection range of metal cation, particularly a kind of method of utilizing VA family or VIA group element compound to detect metal cation.
Background technology
At present, the deterioration that has also brought environment the industrial technology fast development time.For example, the waste water that industries such as industrial and mineral extraction industry, chemical industry, battery, plating will contain the plurality of heavy metal ion does not add to handle or handle a little and just is discharged in the water body, causes the water body weight tenor to increase, and water quality is obviously worsened, polluted drinking water.For example, in chrome waste water, Cr
6+Sensitization is arranged when low concentration, to mucocutaneous pungency and corrosivity effect arranged during high concentration.Simultaneously, chromium can influence animal body interior oxidation, reduction and hydrolytic process after entering animal body, and can make protein denaturation, precipitate nucleic acids and nucleoprotein, interferases system.Chromium forms chromium oxide after entering blood, causes haemoglobin to become methemoglobin, makes red blood cell carry the function generation obstacle of oxygen, causes cell hypoxia.
Along with improving constantly of people's living standard, the owning amount of city automobile is also increasing, and automobile is discharged a large amount of leaded tail gas, and airborne lead content is increased gradually.Lead is a kind of heavy metal element, and its content in dust, aerial drift, vehicle exhaust, paint, toy for children, some glazed colored pottery ceramic products and plastic plasticizer is higher.Lead has stronger toxicity, wherein based on neurotoxicity.As everyone knows, people's thought and act is subjected to neural control, in case nervous system is destroyed, its consequence is very serious.Children are in nervous system development and improve the phase, it is the main colony that threatened by lead contamination, lead contamination can cause the reduction of children's height, learning ability to weaken, and many-sides such as its intelligence, behavior, ability and body development is all had the harm of serious nonreversibility.Because the plumbous long-term hazards that may constitute human health, the World Health Organization (WHO) has been 10 μ g/L with Pb in Drinking Water upper content limit standard setting.In addition, other toxicity kation is accumulated to finite concentration in human body, can cause the damage of human organ and tissue equally, causes that human body is poisoned or even death, the serious threat mankind's life security.
China administers the main at present policy of relying mainly on prevention, preventing and treating combination that adopts of heavy metal pollution.Though the equipment of special detection metallic ion such as Atomic Absorption Spectrometer (AAS), atomic fluorescence spectrometer (AFS) and inductively coupled plasma-mass spectrum logotype instrument (ICP-MS) etc. are arranged now, but these instruments cost an arm and a leg, and often have defectives such as sample preparation steps complexity, sample poorly water-soluble, ion interference are serious when detecting metallic ion.In view of each local economic development difference, a lot of conditions do not possess or the jejune unit of technology or individuality can't adopt above-mentioned sophisticated equipment that heavy metal is carried out routine, fast detecting and monitoring in real time, cause polluting enlarging; In addition, utilize the method for instrument detecting can not realize to water quality in real time, detect on the spot and monitor.
In order to reduce environmental pollution, guarantee human life health and keep economic sustainable development, accomplish early to detect, early administer, reduce the cost of pollution control, heavy-metal pollution is controlled at minimum level to the mankind's harm, must accomplishes fast, the toxic metal ion in the testing environment in real time.Therefore, research and develop a kind of highly sensitive, selectivity good, simple to operate, sampling amount is few, and the method that directly detects the toxic metal ion fast with low cost seems very urgent and necessary.
At present, utilize simple metachromasia both at home and abroad, adopt hybrid systems that noble metal nano particles (as golden nanometer particle/Nano silver grain) and nucleic acid or protein forms as sensor application in environmental analysis, bioanalysis and medical analysis; Perhaps do not adopt complicated noble metal nano particles and nucleic acid or protein hybridization system, only adopt common complexing method, detect and contain Hg
2+, Pb
2+And Co
2+Deng system.But above-mentioned the whole bag of tricks really is applied to actual system to be checked, also have many problems to need to solve, there is poor selectivity in the kind complexity of metal cation in for example actual system to be checked, problem such as detection sensitivity is low and the on-the-spot promptness of test sample is bad.
Summary of the invention
The invention provides the method that a kind of VA of utilization family or VIA group element compound detect metal cation, can detect Pb simply, fast and delicately
2+, Cr
3+And Cr
6+Deng the toxic metal kation.
A kind of method of utilizing VA family or VIA group element compound to detect metal cation comprises step:
(1) in the tetrachloro alloy aqueous acid, adds surface protectant and reductive agent, make the detection liquid that contains the surface protectant gold nano-particles modified;
(2) provide the above-mentioned detection liquid of two parts of identical and equivalent; Isopyknic solution and detected solution that does not contain described metal cation is added respectively in described two parts of detection liquid, form corresponding first mixed solution and second mixed solution;
Wherein, it is identical with the solvent of detected solution not contain described metal ion solution, is selected from water or ethanol;
(3) in described first mixed solution and second mixed solution, add the VA family or the VIA group element compound aqueous solution of equivalent respectively, form corresponding the 3rd mixed solution and the 4th mixed solution; With respect to the change color of the 3rd mixed solution or according to of the variation of the 4th mixed solution, judge whether there is described metal cation in the detected solution according to the color of the 4th mixed solution with respect to the 3rd mixed solution UV, visible light absorption intensity.
The present invention utilizes VA family or VIA group element compound and toxic metal kation to interact, it is on-the-spot in solution that to form a kind of be nuclear with the golden nanometer particle, compound with VA family or VIA group element compound and toxic metal kation interaction formation is the nucleocapsid structure of shell, contained VA family or element R of VIA family and metal ions M in general VA family or the VIA group element compound
N+Reaction forms compound, i.e. M on the golden nanometer particle surface
N++ R
Y-=M
yR
n, or M
N++ (R
xA
y)
Z-=M
z(R
xA
y)
nWherein, n, x, y and z all represent the price number, independently get the integer of 1-6 separately, R represents VA family or VIA family element, and M represents metallic element, A represents the various chemical groups of chemical field, thereby the surface plasma body resonant vibration absorption peak of golden nanometer particle is changed, cause the color of solution to change, but the common toxic metal kation of fast detecting.
Described surface protectant is selected from cetyl trimethyl ammonium bromide (CTAB), contain in the compound of sulfydryl one or more; Use different surface protectants can obtain the golden nanometer particle of surface, can optionally detect tested metal cation and reduce the interference of other non-tested metal cation with needed different electric charges.
The described preferred mercaptoacetic acid of compound of sulfydryl, in the glutathione one or both of containing.
Described reductive agent is selected from sodium borohydride (NaBH
4).
Described metal cation is selected from Pb
2+, Cr
3+, Cr
6+In one or more.
Described detected solution can be that the water sample in the environment also can be the solution that the water-soluble or organic solvent of other environmental samples forms, and is dissolved in the solution that forms in water or the ethanol as the environmental sample of gaseous state, solid-state environmental sample, urine, blood etc. in the biomedicine; Also urine, blood etc. is dissolved in the solution that forms in water or the ethanol behind oxygenant oxidation organic component.
In the step (1), after the described detection liquid that contains the surface protectant gold nano-particles modified is regulated the pH value with acid or alkali, carry out all the other operations.Regulate the pH value that detects liquid, can satisfy the best requirement of different systems to the pH value, suitable pH value not only can be saved detection time and be got rid of the interference of non-detection material, but also can further improve detectability and detection sensitivity.
If described metal cation is Pb
2+, then described VA family or VIA group element compound be selected from can and Pb
2+Easily form the element salt of precipitation compound, preferred solubility seleno sulfate is as Na
2SeSO
3, K
2SeSO
3, Li
2SeSO
3, MgSeSO
3, CaSeSO
3Deng in a kind of.The pH value of described detection liquid is preferably 3 to 8, and acceptable salts aqueous acid or sodium hydrate aqueous solution are regulated the pH value, with further raising detectability.
If described metal cation is Cr
3+Or Cr
6+, then described VA family or VIA group element compound be selected from can and Cr
3+Or Cr
6+Easily form the element salt of precipitation compound, preferred soluble phosphate is as Na
3PO
4, K
3PO
4, Li
3PO
4, Mg
3(PO
4)
2, Ca
3(PO
4)
2Deng in a kind of.The pH value of described detection liquid is preferably 5 to 10, and acceptable salts aqueous acid or sodium hydrate aqueous solution are regulated the pH value, with further raising detectability.This method can be directly used in and detect Cr
3+, when being used to detect Cr
6+The time, generally adopt the existing technology in this area in advance with Cr
6+Be reduced into Cr
3+
Described VA family or the concentration of VIA group element compound in the 4th mixed solution are high more, required time of the change color of the 4th mixed solution is short more, the sensitivity that detects metal cation is high more, but VA family or the excessive concentration of VIA group element compound in the 4th mixed solution, then can influence the stability of golden nanometer particle, so can be undertaken preferably by repeatedly testing when utilizing VA family or VIA group element compound to detect metal cation, that is: according to method of the present invention, only changing VA family or the concentration of VIA group element compound in the 4th mixed solution, under the constant prerequisite of other condition, seek and detect the required VA family of metal cation or the optium concentration of VIA group element compound.
Change with respect to the 3rd mixed solution UV, visible light absorption intensity according to the 4th mixed solution, can calculate the content of metal cation described in the detected solution, specifically comprise according to the existing standard working curve method in this area:
Prepare the solution of a series of metal kation variable concentrations in advance according to the compound method of described the 4th mixed solution, detect the absorption intensity of UV, visible light and near-infrared wavelength respectively at 200nm-1200nm, with the UV, visible light of each solution and the absorption intensity of near-infrared wavelength is ordinate, the concentration of each solution is horizontal ordinate, the drawing standard working curve.
Detect the UV, visible light of the 4th mixed solution and the absorption intensity of near-infrared wavelength under the same conditions, draw the concentration (being content) of metal cation in the 4th mixed solution by standard working curve.
The present invention has following advantage:
The present invention is based on the golden nanometer particle system, utilize VA family or VIA group element compound and detected metal cation to interact, having formed with the golden nanometer particle on the golden nanometer particle surface is nuclear, compound with VA family or VIA group element compound and detected metal cation interaction formation is the nucleocapsid structure of shell, the surface plasma body resonant vibration absorption peak that has caused golden nanometer particle changes, cause the color of solution to change, thereby can directly differentiate the variation of solution colour, realize detecting apace the detected metal cation in the solution system by naked eyes or simple instrument and equipment.The difference of contained detected metal cation amount in the detected sample, make the golden nanometer particle surface form the thickness difference of shell, thereby make solution of gold nanoparticles change color time length and be of different shades, realize detection according to this to detected metal cation.
The inventive method can realize Pb
2+, Cr
3+And Cr
6+Deng the cationic detection of toxic metal, have characteristics simple to operation, that detection is with low cost, selectivity good, detection sensitivity is high and sampling amount is few.Be suitable for the detection of various samples such as lake water quality of river investigation, sewage effluent water quality detection, the urgent water safety detection of outdoor activities, domestic water and food samples, also can be used for simultaneously the detection of the metal cation in the blood and urine in the clinical medicine.
Embodiment
Embodiment 1 detects the preparation of liquid
The tetrachloro alloy aqueous acid 5mL that gets 5mmol/L joins in the deionized water of 71mL, the CTAB aqueous solution 24mL that under stirring condition, adds 0.5mmol/L, then lentamente to the sodium borohydride aqueous solution that wherein adds 1.6mL 1mmol/L, continue at ambient temperature to stir 30 minutes, can obtain containing the detection liquid of CTAB gold nano-particles modified.
Pb in embodiment 2 water samples
2+Detection
1) Na
2SeSO
3The preparation of solution
0.0158g the Se powder and the Na of 4mL 0.2mol/L
2SO
3Solution is pressed [Se]: [SO
3 2-The mol ratio ratio of]=1: 4 joins and is heated to 80 ℃ of dissolvings in the 95mL deionized water, makes [SeSO
3 2-] concentration is 2 * 10
-3The Na of mol/L
2SeSO
3Solution is then with Na
2SeSO
3It is standby that solution is placed into 4 ℃ of refrigerators.
2) Pb
2+Detection
At first, the golden nanometer particle of getting 10mL embodiment 1 preparation detects liquid, regulates pH value to 4.0 with the aqueous hydrochloric acid solution of 0.1mol/L, and acquisition pH value is 4.0 the detection liquid that contains golden nanometer particle.
Then, prepare the test tube A and the test tube B of two same specifications; In test tube A and test tube B, add identical and above-mentioned pH value equal-volume (1mL) respectively and be 4.0 detection liquid.
Once more, in test tube A and test tube B, add isopyknic 1mL ultrapure water and 1mL water sample to be detected respectively, then in test tube A and test tube B, add the above-mentioned Na of 1mL respectively
2SeSO
3Solution.
At last, test tube A and test tube B are placed at ambient temperature, observe the change color situation of solution among test tube A and the test tube B.
In 10 minutes, if among the test tube B color of solution to change with respect to solution colour among the test tube A be purpling look or color burn, then judge and contain Pb in the water sample
2+, and Pb in the water sample
2+Concentration is more than or equal to 5.0 * 10
-5Mol/L.
If after 10 minutes among the test tube B color of solution do not change with respect to the color of solution among the test tube A and do not see that promptly purpling look or color do not deepen, continue to place at ambient temperature 30 minutes, observe change color again, if to change with respect to the color of solution among the test tube A be purpling look or color burn to the color of solution among the test tube B, then judge and contain Pb in the water sample
2+If the color of solution does not change among the test tube B, then judge not contain Pb in the water sample
2+
Pb in embodiment 3 water samples
2+Detection
1) K
2SeSO
3The preparation of solution
0.0158g the Se powder and the K of 4mL 0.2mol/L
2SO
3Solution is pressed [Se]: [SO
3 2-The mol ratio ratio of]=1: 4 joins in the 95mL deionized water, is heated to 80 ℃ of reactions then, all dissolves up to the solid body, makes [SeSO
3 2-] concentration is 2 * 10
-3The K of mol/L
2SeSO
3Solution is then with K
2SeSO
3It is standby that solution is placed into 4 ℃ of refrigerators.
2) Pb
2+Detection
Except with Na
2SeSO
3Solution replaces to above-mentioned K
2SeSO
3Outside the solution, all the other are operated with embodiment 2.
In 10 minutes, if among the test tube B color of solution to change with respect to solution colour among the test tube A be purpling look or color burn, then judge and contain Pb in the water sample
2+, and Pb in the water sample
2+Concentration is more than or equal to 5.0 * 10
-5Mol/L.
If after 10 minutes among the test tube B color of solution do not change with respect to the color of solution among the test tube A and do not see that promptly purpling look or color do not deepen, continue to place at ambient temperature 30 minutes, observe change color again, if to change with respect to the color of solution among the test tube A be purpling look or color burn to the color of solution among the test tube B, then judge and contain Pb in the water sample
2+If the color of solution does not change among the test tube B, then judge not contain Pb in the water sample
2+
Pb in embodiment 4 blood samples
2+Detection
1) processing of blood sample
By the aqueous solution of nitric acid that to add strong oxidising agent concentration be 3mol/L, make organic component in the blood sample by complete oxidation, the volume ratio of aqueous solution of nitric acid and blood is 1: 5, filters gained filtrate and is through pretreated blood sample.
2) Pb
2+Detection
At first, the golden nanometer particle of getting 10mL embodiment 1 preparation detects liquid, regulates pH value to 4.0 with the aqueous hydrochloric acid solution of 0.1mol/L then, and acquisition pH value is 4.0 golden nanometer particle detection liquid.
Then, prepare the test tube A and the test tube B of two same specifications; In test tube A and test tube B, add identical and above-mentioned pH value equal-volume (1mL) respectively and be 4.0 detection liquid.
Once more, in test tube A and test tube B, add respectively isopyknic 1mL ultrapure water and 1mL to be detected through pretreated blood sample, then in test tube A and test tube B, add the Na of 1mL embodiment 2 preparations respectively
2SeSO
3Solution.
At last, test tube A and test tube B are placed at ambient temperature, observe the change color situation of solution among test tube A and the test tube B.
In 10 minutes, if among the test tube B color of solution to change with respect to solution colour among the test tube A be purpling look or color burn, then judge and contain Pb in the water sample
2+And Pb in pretreated blood sample
2+Concentration is more than or equal to 5.0 * 10
-5Mol/L.
If after 10 minutes among the test tube B color of solution do not change with respect to the color of solution among the test tube A and do not see that promptly purpling look or color do not deepen, continue to place at ambient temperature 30 minutes, observe change color again, if to change with respect to the color of solution among the test tube A be purpling look or color burn to the color of solution among the test tube B, then judge in the blood sample after treatment and contain Pb
2+If the color of solution does not change among the test tube B, then judge in pretreated blood sample, not contain Pb
2+
Cr in embodiment 5 water samples
3+Detection
At first, get the detection liquid of the golden nanometer particle of 10mL embodiment 1 preparation, regulate pH value to 8.0 with the aqueous hydrochloric acid solution of 0.1mol/L then, acquisition pH value is 8.0 golden nanometer particle detection liquid.
Then, prepare the test tube A and the test tube B of two same specifications; In test tube A and test tube B, add identical and above-mentioned pH value equal-volume (1mL) respectively and be 8.0 detection liquid.
Once more, in test tube A and test tube B, add isopyknic 1mL ultrapure water and 1mL water sample to be detected respectively, then in test tube A and test tube B, add the Na of 1mL 0.1mol/L respectively
3PO
4Aqueous solution.
At last, test tube A and test tube B are placed at ambient temperature, observe the situation of change of solution among test tube A and the test tube B.
In 10 minutes,, then judge and contain Cr in the water sample if the color of solution changes with respect to solution colour among the test tube A and promptly becomes orange or color burn among the test tube B
3+And Cr in the water sample
3+Concentration is more than or equal to 10
-5Mol/L.
If after 10 minutes among the test tube B color of solution do not change with respect to the color of solution among the test tube A and promptly do not see and become orange or color is not deepened, continue to place at ambient temperature 30 minutes, observe change color again, if the color of solution changes with respect to the color of solution among the test tube A and promptly becomes orange or color burn among the test tube B, then judge and contain Cr in the water sample
3+If the color of solution does not change among the test tube B, then judge not contain Cr in the water sample
3+
Cr in embodiment 6 blood samples
3+Detection
1) processing of blood sample
By the aqueous solution of nitric acid that to add strong oxidising agent concentration be 3mol/L, make organic component in the blood sample by complete oxidation, the volume ratio of aqueous solution of nitric acid and blood is 1: 5, adds to filter gained filtrate behind the ethanol and be through pretreated blood sample.
2) Cr
3+Detection
At first, get the detection liquid of the golden nanometer particle of 10mL embodiment 1 preparation, regulate pH value to 8.0 with the aqueous hydrochloric acid solution of 0.1mol/L then, acquisition pH value is 8.0 golden nanometer particle detection liquid.
Then, prepare the test tube A and the test tube B of two same specifications; In test tube A and test tube B, add identical and above-mentioned pH value equal-volume (1mL) respectively and be 8.0 detection liquid.
Once more, in test tube A and test tube B, add respectively isopyknic 1mL ethanol and 1mL to be detected through pretreated blood sample, then in test tube A and test tube B, add the Na of 1mL 0.1mol/L respectively
3PO
4Aqueous solution.
At last, test tube A and test tube B are placed at ambient temperature, observe the situation of change of solution among test tube A and the test tube B.
In 10 minutes,, then judge in the blood sample after treatment and contain Cr if the color of solution changes with respect to solution colour among the test tube A and promptly becomes orange or color burn among the test tube B
3+And Cr
3+Concentration is more than or equal to 10
-5Mol/L.
If after 10 minutes among the test tube B color of solution do not change with respect to the color of solution among the test tube A and promptly do not see and become orange or color is not deepened, continue to place at ambient temperature 30 minutes, observe change color again, if the color of solution changes with respect to the color of solution among the test tube A and promptly becomes orange or color burn among the test tube B, then judge and contain Cr in the blood sample
3+If the color of solution does not change among the test tube B, then judge not contain Cr in the blood sample
3+
Cr in embodiment 7 blood samples
3+Detection
1) processing of blood sample
With the operation among the embodiment 6.
2) Cr
3+Detection
Except with Na
3PO
4Solution replaces to K
3PO
4Outside the solution, all the other are operated with embodiment 6.
In 10 minutes,, then judge in the blood sample after treatment and contain Cr if the color of solution changes with respect to solution colour among the test tube A and promptly becomes orange or color burn among the test tube B
3+And Cr
3+Concentration is more than or equal to 10
-5Mol/L.
If after 10 minutes among the test tube B color of solution do not change with respect to the color of solution among the test tube A and promptly do not see and become orange or color is not deepened, continue to place at ambient temperature 30 minutes, observe change color again, if the color of solution changes with respect to the color of solution among the test tube A and promptly becomes orange or color burn among the test tube B, then judge and contain Cr in the blood sample
3+If the color of solution does not change among the test tube B, then judge not contain Cr in the blood sample
3+
Cr in embodiment 8 water samples
6+Detection
Sodium borohydride (NaBH with 1mol/L
4) aqueous solution handles water sample to be measured 30 minutes earlier, with the Cr in the water sample to be measured
6+Be reduced into Cr
3+Other operation is identical with embodiment 4.
In 10 minutes,, then judge and contain Cr in the water sample if the color of solution changes with respect to solution colour among the test tube A and promptly becomes orange or color burn among the test tube B
6+And Cr in the water sample
6+Concentration is more than or equal to 10
-5Mol/L.
If after 10 minutes among the test tube B color of solution do not change with respect to the color of solution among the test tube A and promptly do not see and become orange or color is not deepened, continue to place at ambient temperature 30 minutes, observe change color again, if the color of solution changes with respect to the color of solution among the test tube A and promptly becomes orange or color burn among the test tube B, then judge and contain Cr in the water sample
6+If the color of solution does not change among the test tube B, then judge not contain Cr in the water sample
6+
Cr in the embodiment 9 food samples
6+Detection
With the water-soluble food samples that obtains of food to be measured, elder generation's strong oxidising agent concentration expressed in percentage by volume of adding in food samples is 98% red fuming nitric acid (RFNA), the milliliter number of red fuming nitric acid (RFNA) is 1: 1 with the ratio of the gram number of food samples, make organic component in the food samples by complete oxidation, and then with the sodium borohydride (NaBH of 1mol/L
4) aqueous solution handles food samples 30 minutes, with the Cr in the food samples
6+Be reduced into Cr
3+Other operation is identical with embodiment 4.
In 10 minutes,, then judge and contain Cr in the water sample if the color of solution changes with respect to solution colour among the test tube A and promptly becomes orange or color burn among the test tube B
6+And Cr in the water sample
6+Concentration is more than or equal to 10
-5Mol/L.
If after 10 minutes among the test tube B color of solution do not change with respect to the color of solution among the test tube A and promptly do not see and become orange or color is not deepened, continue to place at ambient temperature 30 minutes, observe change color again, if the color of solution changes with respect to the color of solution among the test tube A and promptly becomes orange or color burn among the test tube B, then judge and contain Cr in the water sample
6+If the color of solution does not change among the test tube B, then judge not contain Cr in the water sample
6+
Claims (4)
1. method of utilizing VA family or VIA group element compound to detect metal cation comprises step:
(1) in the tetrachloro alloy aqueous acid, adds surface protectant and reductive agent, make the detection liquid that contains the surface protectant gold nano-particles modified;
Described surface protectant is selected from cetyl trimethyl ammonium bromide, contain in the compound of sulfydryl one or more; The described compound selected from mercapto acetate of sulfydryl, in the glutathione one or both of containing;
(2) provide the above-mentioned detection liquid of two parts of identical and equivalent; Isopyknic solution and detected solution that does not contain described metal cation is added respectively in described two parts of detection liquid, form corresponding first mixed solution and second mixed solution;
Wherein, it is identical with the solvent of detected solution not contain described metal ion solution, is selected from water or ethanol;
(3) in described first mixed solution and second mixed solution, add the VA family or the VIA group element compound aqueous solution of equivalent respectively, form corresponding the 3rd mixed solution and the 4th mixed solution; With respect to the change color of the 3rd mixed solution or according to of the variation of the 4th mixed solution, judge whether there is described metal cation in the detected solution according to the color of the 4th mixed solution with respect to the 3rd mixed solution UV, visible light absorption intensity;
Described metal cation is Pb
2+, described VA or VIA element compound are selected from solubility seleno sulfate, and the pH value of described detection liquid is 3 to 8;
Perhaps, described metal cation is Cr
3+Or Cr
6+, described VA or VIA element compound are selected from soluble phosphate, and the pH value of described detection liquid is 5 to 10.
2. the method for utilizing VA family or VIA group element compound to detect metal cation according to claim 1 is characterized in that described reductive agent is selected from sodium borohydride.
3. the method for utilizing VA family or VIA group element compound to detect metal cation according to claim 1 is characterized in that described solubility seleno sulfate is Na
2SeSO
3, K
2SeSO
3, Li
2SeSO
3, MgSeSO
3, CaSeSO
3In a kind of.
4. the method for utilizing VA family or VIA group element compound to detect metal cation according to claim 1 is characterized in that described soluble phosphate is Na
3PO
4, K
3PO
4, Li
3PO
4In a kind of.
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| 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 |
| CN102507454A (en) * | 2011-10-31 | 2012-06-20 | 中国科学院宁波材料技术与工程研究所 | Method for detecting trivalent chromium ions |
| CN102519948B (en) * | 2011-11-24 | 2014-05-07 | 中国科学院宁波材料技术与工程研究所 | Detection method for hexavalent chromium ions |
| CN102621091B (en) * | 2012-04-01 | 2014-07-30 | 中国科学院宁波材料技术与工程研究所 | Method for quickly detecting copper ions in solution |
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