CN110186983A - A kind of identification metal ion Cu2+And Ag+Method - Google Patents
A kind of identification metal ion Cu2+And Ag+Method Download PDFInfo
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Abstract
A kind of identification metal ion Cu2+And Ag+Method, it is characterised in that: apply " H2SO4‑KIO3‑[NiL](ClO4)2Malonic acid-H2O2" chemical oscillation system is as solution is identified, according to metal ion Cu2+And Ag+Influence to system oscillation is different, to realize metal ion Cu2+And Ag+Identification.Electrical oscillation map provided by discrimination method according to the present invention has intuitive, can be convenient and quickly identifies Cu2+And Ag+, and equipment is simple, accuracy is high, easily operated and observation.
Description
Technical field
The present invention relates to a kind of discrimination methods, specifically a kind of 14 cyclic diolefine nickel complex [NiL] of four azepine
(ClO4)2 The chemical system of catalysis is to metal ion Cu2+And Ag+Discrimination method, belong to qualitative analysis chemical field.
Background technique
Cu2+And Ag+Belong to metal cation.Copper ion is to lose outermost two electronics by copper atom to obtain,
Positive divalent is shown, Cu is written as2+, usually aobvious blue, copper ion Cu2+It is in aqueous solution actually with hydrated ion [Cu (H2O)4]2+
Form existing for, hydration copper ion it is blue, so our common copper salt solutions are mostly blue.Ag+It is that silver atoms lose
The positively charged cation electronically formed is removed, is usually existed as an aqueous solution, silver ion has oxidation, in day
Often it is usually used in sterilizing etc. in life.
At present it has been reported that identification Cu2+And Ag+Method mainly have compleximetry, spectrophotometry, chemiluminescence
The methods of method, electrochemical methods, chromatography, spectroscopic methodology and mass spectrography.But identify the discrimination method of the more intuitive simplicity of the two
Also be not reported out, thus find a kind of identification effect it is good and it is easy to operate quickly, the qualitative analysis side that easily determines of result
Method just seems very necessary.
Summary of the invention
The present invention is directed to be metal ion Cu2+And Ag+A kind of novel and conveniently discrimination method is provided, that is, is applied
[NiL](ClO4)2The chemical oscillation system of catalysis is to metal ion Cu2+And Ag+Discrimination method, this discrimination method be based on should
Complex-catalyzed chemical oscillation system is to metal ion Cu2+And Ag+Sharp response and a kind of electrochemical oscillation body for developing
It is method.Specifically, being by same concentrations sample (Cu to be identified2+And Ag+) be added separately in two groups of chemical oscillation systems, root
Influence according to sample to be identified to chemical oscillation system is different, realizes the qualitative analysis to sample to be identified: if being added to be identified
After sample, chemical oscillation system is made to occur vibrating the phenomenon that terminating at once, then the sample to be identified being added is Cu2+；If being added
After solution to be identified after chemical oscillation system current potential rapid increase again rapid decrease, and oscillation be suppressed, with one section inhibition
Restore oscillation after time again, forms a upward spike on entirely oscillation map, while it is less to vibrate the lost of life, then institute
The sample to be identified being added is Ag+, and present invention processing sample time is short, determination condition is simple and easy to control to be convenient for promoting and answering
With.
The present invention solves technical problem, adopts the following technical scheme that
The present invention is metal ion Cu2+And Ag+Discrimination method is provided, it is characterized in that:
Using distilled water as solvent, the solution of sample to be identified is prepared；
Using " H2SO4 - KIO3 - [NiL](ClO4)2 Malonic acid-H2O2" chemical oscillation system conduct identification solution, record
The electrical oscillation map of chemical oscillation system, at any one stable current potential minimum point, be added into chemical oscillation system to
The solution for identifying sample, the influence according to sample to be identified to chemical oscillation system is different, realizes to the qualitative of sample to be identified
Analysis；
The sample to be identified is Cu2+And Ag+；
Into two groups of identification solution (chemical oscillation system), it is separately added into sample (Cu to be identified2+And Ag+) solution.If being added
Chemical oscillation system is set to occur vibrating the phenomenon that terminating at once after sample to be identified, then sample to be identified is Cu2+；If being added wait reflect
Rapid decrease again after chemical oscillation system current potential rapid increase after other style product, and oscillation is suppressed, with one inhibition time
Restore oscillation again afterwards, forms a upward spike on entirely oscillation map, while it is less to vibrate the lost of life, then it is to be identified
Sample is Ag+。
The 3rd ~ 25 current potential that any one stable current potential minimum point that the oscillation generates refers to that oscillation generates is minimum
Point in any one.
So-called four azepines, the 14 cyclic diolefine nickel complex of the present invention is 5,7,7,12,14,14- vegolysen,
Tetra- azepine of 4,8,11-, 14-4,11- diene be ligand four major esters nickel () complex, structural formula such as formula (I) institute
Show, and is denoted as [NiL] (ClO4)2, L is 5,7,7,12,14,14- vegolysens, 4,8,11- tetra- azepines 14-4,11- bis-
Alkene；
Myoglobins in the structure and life entity of this complex, hemoglobin, chlorophyll and some metalloenzyme key structure
Porphyrin ring is much like, this with [NiL] (ClO4)2The chemical oscillating reaction and the intracellular biochemical oscillation of plant and animal of catalysis
It is similar.So the system has stable amplitude, longer oscillation service life and to Cu2+And Ag+Sharp response.
[NiL](ClO4)2Preparation in two steps: 1) prepare L2HClO4；2) by L2HClO4It prepares [NiL]
(ClO4)2。
1) L2HClO is prepared4:
98.5mL ethylenediamine is fitted into a 500mL three-necked bottle, under condition of ice bath, is slowly added dropwise under being stirred in 120 minutes
126mL70% perchloric acid.Initial reaction is violent and generates with white cigarette, so rate of addition control is in every five seconds clock l drop.With
Reaction carries out suitably accelerating rate of addition, until dripping, obtains transparent solution.Still in the condition of ice-water bath
Under, 224mL anhydrous propanone is added to the clear solution and is vigorously stirred, solution becomes cloudy quickly is formed simultaneously very sticky mixing
Object.Still 2-3 hours are kept under conditions of ice-water bath sufficiently to react.Products therefrom is transferred to Buchner funnel to take out
Filter separation, and sufficiently washed with acetone, pure white solid can be obtained.By this it is pure from color solid heat methanol-water solution in tie again
Crystalline substance is dried in vacuo with silica-gel desiccant, obtains 80g white crystal, this white crystal is L2HClO4。
Bibliography:
1.Curtis, N. F. and Hay, R. W. , J. Chem. Soc. , Chem. Commun. , 1966, p.
534.
2.Gang Hu, Panpan Chen, Wei Wang, Lin Hu, Jimei Song, LingguangQiu, Juan
Song, E1ectrochimica Acta, 2007, Vol. 52, pp. 7996-8002.
3. Lin Hu, Gang Hu, Han-Hong Xu, J. Ana1. Chem. , 2006, Vol. 61, NO. 10,
pp. 1021-1025.
4. Hu Gang, China Science & Technology University's doctoral thesis, p25-27, Hefei, 2005.
2) by L2HClO4Prepare [NiL] (ClO4)2:
By 11g Ni (AC)24H2The L2HClO of O and 21g4It is placed in 500mL three-necked bottle, it is made to be dissolved in 250mL methanol, hot water
Bath is heated to reflux 3 hours, yellow mercury oxide finally occurs, and filtrate is concentrated into original volume l/2 by filtering in hot bath, is placed
Night, sufficient crystallising obtain yellow crystals.Yellow crystals are transferred to Buchner funnel and are washed with methanol, it is molten in the alcohol-water of heat
It is recrystallized in liquid, is dried in vacuo, 8g [NiL] (ClO can be obtained4)2Glassy yellow crystal.
Bibliography:
1. N. F. Curtis, J. Chem. Soc. Dolton Tran. , 1972, Vol. 13, 1357.
2. Hu Gang, China Science & Technology University's doctoral thesis, p42-43, Hefei, 2005.
This discrimination method difference with the prior art is that the present invention applies " H2SO4 -KIO3-[NiL](ClO4)2- the third two
Acid-H2O2" chemical oscillation system is as solution is identified, with metal ion Cu2+And Ag+To the electrical oscillation map of the identification solution
Influence it is different, realize to Cu2+And Ag+Identification.
Cu2+And Ag+, it is 1.0 × 10 identifying the identifiable concentration range in solution (chemical oscillation system)-3-2.0×
10-3mol/L。
The above-mentioned identifiable concentration range of solution to be identified is experimentally determined optimal concentration range.In the concentration range
It is interior, Cu2+And Ag+The influence difference generated to the identification solution is fairly obvious, is easy to observation analysis, identification easy to accomplish.In addition,
The concentration range for identifying each component in solution (chemical oscillation system) is as shown in table 1, the identification solution obtained by many experiments
The best solution of (chemical oscillation system) is as shown in table 2:
Table 1: the concentration range of each component in chemical oscillation system
| Sulfuric acid (mol/L) | Potassiumiodate (mol/L) | [NiL](ClO4)2 (mol/L) | Malonic acid (mol/L) | Hydrogen peroxide (mol/L) |
| 0.0245625-0.025 | 0.0175-0.01925 | 7.785×10-4-8.65×10-4 | 0.15-0.2 | 1.45-1.55 |
Table 2: the optium concentration of each component in chemical oscillation system
| Sulfuric acid (mol/L) | Potassiumiodate (mol/L) | [NiL](ClO4)2(mol/L) | Malonic acid (mol/L) | Hydrogen peroxide (mol/L) |
| 0.025 | 0.01925 | 8.65×10-4 | 0.175 | 1.45 |
Steps are as follows for specific experiment:
1, it is prepared by concentration range as defined in table 1 and identifies solution, ready working electrode (platinum electrode) and reference electrode is (sweet
Mercury electrode) it is inserted into solution, the other end of working electrode is connected to data by amplifier (Instrument Amplifier)
Collector (Go!LINK) be then connected to computer, open in computer logger lite program to acquisition time and sample rate into
After row setting, start button is clicked rapidly to carry out potential monitoring to solution, obtaining E-t curve collected, (potential value is at any time
Between the curve that changes) i.e. chemical potential oscillation map (sample to be tested is not yet added at this time), to make blank control.To two groups and sky
In the identical identification solution of each component concentration in white control experiment, in any one stable current potential minimum point that oscillation generates
Place, is rapidly added the solution of sample to be identified respectively, different according to oscillatory response of the sample to be identified to chemical oscillation system, real
Now to the qualitative analysis of sample to be identified.That is: after the solution of sample to be identified is added into chemical oscillation system, according to wait reflect
Other style product realize the qualitative analysis to sample to be identified to the difference of oscillatory response caused by chemical oscillation system.
Chemical potential oscillation map basic parameter include:
Amplitude of oscillation: in oscillatory process from a potential minimum to the potential difference next maximum potential.
Cycle of oscillation: in oscillatory process the time required to from minimum (height) current potential to next minimum (height) current potential.
Maximum potential: the current potential highest point that system occurs when stable oscillation stationary vibration.
Potential minimum: the current potential minimum point that system occurs when stable oscillation stationary vibration.
Inhibit time (tin): oscillation is suppressed to oscillation after prepare liquid is added restores required time again.
The oscillation service life: the time from start to end is vibrated in oscillatory process.
Detailed description of the invention
Fig. 1 is when sample to be identified not being added, to identify the oscillation map of solution (chemical oscillation system) in embodiment 1.
Fig. 2 is to be added 1.00 × 10 in embodiment 1-3mol/LCu2+Afterwards, chemical oscillation system oscillatory response obtained
Map.
Fig. 3 is to be added 1.00 × 10 in embodiment 1-3mol/LAg+Afterwards, chemical oscillation system oscillatory response figure obtained
Spectrum.
Fig. 4 is when sample to be identified not being added, to identify the oscillation map of solution (chemical oscillation system) in embodiment 2.
Fig. 5 is to be added 1.5 × 10 in embodiment 2-3mol/LCu2+Afterwards, chemical oscillation system oscillatory response figure obtained
Spectrum.
Fig. 6 is to be added 1.5 × 10 in embodiment 2-3mol/LAg+Afterwards, chemical oscillation system oscillatory response figure obtained
Spectrum.
Fig. 7 is when sample to be identified not being added, to identify the oscillation map of solution (chemical oscillation system) in embodiment 3.
Fig. 8 is to be added 2.0 × 10 in embodiment 3-3mol/LCu2+Afterwards, chemical oscillation system oscillatory response figure obtained
Spectrum.
Fig. 9 is to be added 2.0 × 10 in embodiment 3-3mol/LAg+Afterwards, chemical oscillation system oscillatory response figure obtained
Spectrum.
Specific embodiment
Embodiment 1:
The present embodiment verifies Cu of the present invention as follows2+And Ag+Discrimination method feasibility:
(1) solution is prepared
Use first 98% the concentrated sulfuric acid and distilled water prepare 0.025mol/L sulfuric acid as stock solution, then use 0.025mol/L
Sulfuric acid solution prepare [NiL] (ClO of the potassium iodate solution of 0.14mol/L, 0.0173mol/L respectively4)2Solution, 2mol/L
The hydrogenperoxide steam generator of malonic acid solution, 4mol/L.It is molten that 14.5mL 0.025mol/L sulfuric acid is sequentially added into 50mL small beaker
Liquid, 5.5mL 0.14mol/L potassium iodate solution, 2.0mL 0.0173mol/L [NiL] (ClO4)2Solution, 3.5mL 2mol/L third
Diacid solution and 14.5mL 4mol/L hydrogenperoxide steam generator, with guarantee " H2SO4 - KIO3 - [NiL](ClO4)2 Malonic acid-
H2O2" concentration of each component is sulfuric acid 0.025mol/L, Potassiumiodate 0.01925mol/L, [NiL] in chemical oscillation system
(ClO4)2 8.65×10-4Mol/L, malonic acid 0.175mol/L, hydrogen peroxide 1.45mol/L；
Simultaneously to distill water as solvent, the Cu of 1.0mol/L is prepared respectively2+Solution and Ag+Solution.
(2) map is vibrated
The electrical oscillation map of chemical oscillation system is recorded by the computer equipped with logger lite program, and Fig. 1 is typical dense
(sulfuric acid 0.025mol/L, Potassiumiodate 0.01925mol/L, [NiL] (ClO under degree4)28.65×10-4Mol/L, malonic acid
0.175mol/L, hydrogen peroxide 1.45mol/L), the oscillation map of sample to be tested is not added for above-mentioned identification solution, to make blank pair
According to.Into two groups of each component concentration identification solution identical with above-mentioned concentration, it is separately added into the Cu of 40 μ L 1.0mol/L2+And Ag+, so that it is 1.0 × 10 in the concentration identified in solution-3Mol/L, the time being added every time are all the 6th of oscillation map
At a current potential minimum point, oscillatory response map difference obtained is as shown in Figure 2 and Figure 3.
(3) identify
As metal ion Cu2+And Ag+Because of ionic species difference, the influence to chemical oscillation system is not also identical.Compare Fig. 2
Fig. 3 is it is found that Cu2+Addition so that the oscillation of oscillation system terminates at once；Ag+Addition so that chemical oscillation system current potential is fast
Rapid decrease again after speed rises, and oscillation is suppressed, and with oscillation is restored after one inhibitions time again, is entirely vibrating map
One upward spike of upper formation, while it is less to vibrate the lost of life.By above-mentioned experiment it is found that by comparing the change for vibrating map
Change, may be implemented to Cu2+And Ag+Identification.
Taking the solution of the sample to be identified of two 1.0mol/L prepared in advance, (one of them is Cu2+Solution, another is
Ag+, but the two not yet identifies), it is 1 by one of label, another is labeled as sample 2；
Two groups of each component concentration oscillation solution identical with above-mentioned concentration is prepared, respectively the corresponding oscillation map of acquisition, and the 6th
The sample 1 and sample 2 of 40 μ L 1.0mol/L are separately added at a current potential minimum point, so that they are identifying the concentration in solution
It is 1.0 × 10-3mol/L。
Known to analysis relatively: the addition of sample 1, so that the oscillation of oscillation system is made to terminate (oscillation map and Fig. 2 at once
It is corresponding, not corresponding with Fig. 3), and sample 2 makes rapid decrease after oscillation system current potential rapid increase, and oscillation is pressed down
System forms a upward spike on entirely oscillation map, while vibrating the longevity with oscillation is restored again after one inhibition time
Life shortens less (oscillation map is corresponding with Fig. 3, does not correspond to Fig. 2).Therefore, sample 1 is Cu2+Solution, sample 2 are Ag+It is molten
Liquid, to realize to Cu2+Solution and Ag+The identification of solution.
Embodiment 2:
The present embodiment verifies Cu of the present invention as follows2+And Ag+Discrimination method feasibility:
(1) solution is prepared
Use the sulfuric acid of 98% concentrated sulfuric acid preparation 0.025mol/L as stock solution first, it is then molten with the sulfuric acid of 0.025mol/L
Liquid prepares [NiL] (ClO of the potassium iodate solution of 0.14mol/L, 0.0173mol/L respectively4)2Solution, the malonic acid of 2mol/L are molten
The hydrogenperoxide steam generator of liquid, 4mol/L；13.8mL 0.025mol/L sulfuric acid solution, 5mL are sequentially added into 50mL small beaker
0.14mol/L potassium iodate solution, 2mL 0.0173mol/L [NiL] (ClO4)2Solution, 3mL 2mol/L malonic acid solution,
The distilled water of 15.5mL 4mol/L hydrogenperoxide steam generator and 0.7mol, with guarantee " H2SO4 - KIO3 - [NiL](ClO4)2 - the third
Diacid-H2O2" in chemical oscillation system the concentration of each component be sulfuric acid 0.0245625mol/L, Potassiumiodate 0.0175mol/L,
[NiL](ClO4)2 8.65×10-4Mol/L, malonic acid 0.15mol/L, hydrogen peroxide 1.55mol/L；
Simultaneously to distill water as solvent, the Cu of 1.0mol/L is prepared respectively2+Solution and Ag+Solution.
(2) map is vibrated
The electrical oscillation map of above-mentioned chemical oscillation system is recorded by the computer equipped with logger lite program, investigates Cu2+
And Ag+Difference between generated oscillatory response.Fig. 4 is the oscillation map identified when sample to be tested is not added for solution, to make sky
White control.Into two groups of each component concentration identification solution identical with above-mentioned concentration, it is separately added into the Cu of 60 μ l, 1.0 mol/L2+
Solution and Ag+Solution, so that it is 1.5 × 10 in the concentration identified in solution-3Mol/L, the time being added every time be all
At the 6th current potential minimum point for vibrating map, oscillatory response map difference obtained is as shown in Figure 5, Figure 6.
(3) identify
As metal ion Cu2+And Ag+Because of ionic species difference, the influence to chemical oscillation system is not also identical.Compare Fig. 5
Fig. 6 is it is found that Cu2+Addition so that the oscillation of oscillation system terminates at once；Ag+Addition so that chemical oscillation system current potential is fast
Rapid decrease again after speed rises, and oscillation is suppressed, and with oscillation is restored after one inhibitions time again, is entirely vibrating map
One upward spike of upper formation, while it is less to vibrate the lost of life.By above-mentioned experiment it is found that by comparing the change for vibrating map
Change, may be implemented to Cu2+And Ag+Identification.
Taking the solution of the sample to be identified of two 1.0 mol/L prepared in advance, (one of them is Cu2+Solution, another
For Ag+, but the two not yet identifies), it is 1 by one of label, another is labeled as sample 2；
Two groups of each component concentration oscillation solution identical with above-mentioned concentration is prepared, respectively the corresponding oscillation map of acquisition, and the 6th
The sample 1 and sample 2 of 60 μ l 1.0mol/L are separately added at a current potential minimum point, so that they are identifying the concentration in solution
It is 1.5 × 10-3mol/L。
Known to analysis relatively: the addition of sample 1, so that the oscillation of oscillation system terminates at once, (oscillation map is opposite with Fig. 5
Answer, be not corresponding with Fig. 6), and sample 2 makes rapid decrease after oscillation system current potential rapid increase, and oscillation is suppressed, companion
With oscillation is restored after one inhibition time again, a upward spike is formed on entirely oscillation map, while vibrating service life contracting
Short less (oscillation map is corresponding with Fig. 6, does not correspond to Fig. 5).Therefore, sample 1 is Cu2+Solution, sample 2 are Ag+Solution, from
And it realizes to Cu2+Solution and Ag+The identification of solution.
Embodiment 3:
The present embodiment verifies Cu of the present invention as follows2+And Ag+Discrimination method feasibility:
(1) solution is prepared
Use first 98% the concentrated sulfuric acid and distilled water prepare 0.025mol/L sulfuric acid as stock solution, then use 0.025mol/L
Sulfuric acid solution prepare [NiL] (ClO of the potassium iodate solution of 0.14mol/L, 0.0173mol/L respectively4)2Solution, 2mol/L
The hydrogenperoxide steam generator of malonic acid solution, 4mol/L.It is molten that 14mL 0.025mol/L sulfuric acid is sequentially added into 50mL small beaker
Liquid, 5.2mL 0.14mol/L potassium iodate solution, 1.8mL 0.0173mol/L [NiL] (ClO4)2Solution, 4mL 2mol/L the third two
Acid solution and 15mL 4mol/L hydrogenperoxide steam generator, with guarantee " H2SO4 - KIO3 - [NiL](ClO4)2 Malonic acid-
H2O2" concentration of each component is sulfuric acid 0.025mol/L, Potassiumiodate 0.0182mol/L, [NiL] (ClO in chemical oscillation system4)2
7.785×10-4Mol/L, malonic acid 0.2mol/L, hydrogen peroxide 1.5mol/L；
Simultaneously to distill water as solvent, the Cu of 1.0mol/L is prepared respectively2+Solution and Ag+Solution.
(2) map is vibrated
The electrical oscillation map of chemical oscillation system is recorded by the computer equipped with logger lite program, and Fig. 7 is above-mentioned identification
The oscillation map of sample to be tested is not added for solution, to make blank control.To two groups of each component concentration mirror identical with above-mentioned concentration
In other solution, it is separately added into the Cu of 80 μ L 1.0mol/L2+Solution and Ag+Solution, so that it is in the concentration identified in solution
2.0×10-3Mol/L, the time being added every time are all at the 6th current potential minimum point of oscillation map, and oscillation obtained is rung
Answer map difference as shown in Figure 8, Figure 9.
(3) identify
As Cu2+And Ag+Because of ionic species difference, the influence to chemical oscillation system is not also identical.Compare known to Fig. 8 Fig. 9
Cu2+Addition so that the oscillation of oscillation system terminates at once；Ag+Addition so that after chemical oscillation system current potential rapid increase
Rapid decrease again, and oscillation is suppressed, and with oscillation is restored again after one inhibition time, forms one on entirely oscillation map
A upward spike, while it is less to vibrate the lost of life.It, can be with by above-mentioned experiment it is found that by comparing the variation for vibrating map
It realizes to Cu2+And Ag+Identification.
Taking the solution of the sample to be identified of two 1.0mol/L prepared in advance, (one of them is Cu2+Solution, another is
Ag+Solution, but the two not yet identifies), it is 1 by one of label, another is labeled as sample 2；
Two groups of each component concentration oscillation solution identical with above-mentioned concentration is prepared, respectively the corresponding oscillation map of acquisition, and the 6th
The sample 1 and sample 2 of 80 μ l 1.0mol/L are separately added at a current potential minimum point, so that they are identifying the concentration in solution
It is 2.0 × 10-3mol/L。
Known to analysis relatively: the addition of sample 1, so that the oscillation of oscillation system terminates at once, (oscillation map is opposite with Fig. 8
Answer, be not corresponding with Fig. 9), and sample 2 makes rapid decrease after oscillation system current potential rapid increase, and oscillation is suppressed, companion
With oscillation is restored after one inhibition time again, a upward spike is formed on entirely oscillation map, while vibrating service life contracting
Short less (oscillation map is corresponding with Fig. 9, does not correspond to Fig. 8).Therefore, sample 1 is Cu2+Solution, sample 2 are Ag+Solution, from
And it realizes to Cu2+Solution and Ag+The identification of solution.
By the above various embodiments as can be seen that the Cu of smaller or larger concentration2+Solution and Ag+Solution can also pass through this
Inventive method is identified.
Claims (4)
1. a kind of identification metal ion Cu2+And Ag+Method, it is characterised in that:
Using distilled water as solvent, the solution of sample to be identified is prepared；
Using " H2SO4 - KIO3 - [NiL](ClO4)2 Malonic acid-H2O2" chemical oscillation system conduct identification solution, record
The current potential of chemical oscillation system changes with time electrical oscillation map, minimum in any one stable current potential that oscillation generates
At point, into two groups of identification solution, i.e. in two groups of afore mentioned chemical oscillation systems, it is separately added into the solution of sample to be identified, according to
Influence of the sample to be identified to chemical oscillation system is different, realizes the identification to sample to be identified: if after solution to be identified is added
Chemical oscillation system occurs vibrating the phenomenon that terminating at once, then the sample to be identified being added is Cu2+；If solution to be identified is added
Rapid decrease again after chemical oscillation system current potential rapid increase afterwards, and oscillation is suppressed, with extensive after one inhibitions time
Complex oscillation forms a upward spike on entirely oscillation map, while vibrating that the lost of life is less, then be added wait reflect
Other style product are Ag+；
[NiL](ClO4)2Middle L is 5,7,7,12,14,14- vegolysen, tetra- azepine of 4,8,11-, 14-4,11-
Diene；Identify the molar concentration of each component in solution are as follows: sulfuric acid 0.0246875-0.025mol/L, Potassiumiodate 0.01925-
0.021mol/L、[NiL](ClO4)26.4875×10-4-8.65×10-4Mol/L, malonic acid 0.15-0.175mol/L, peroxide
Change hydrogen 1.35-1.45mol/L；
The sample to be identified is Cu2+Or Ag+。
2. discrimination method according to claim 1, it is characterised in that: the molar concentration for identifying each component in solution is sulfuric acid
0.025mol/L, Potassiumiodate 0.01925mol/L, [NiL] (ClO4)2 8.65×10-4Mol/L, malonic acid 0.175mol/L, mistake
Hydrogen oxide 1.45mol/L.
3. discrimination method according to claim 1, it is characterised in that: any one stable current potential that the oscillation generates
Minimum point refers to any one in the 3rd ~ 25 current potential minimum point that oscillation generates.
4. discrimination method according to claim 1, it is characterised in that: sample to be identified is identifiable in identification solution
Concentration range is 1.0 × 10-3-2.0×10-3mol/L。
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| CN111751433A (en) * | 2020-07-07 | 2020-10-09 | 重庆大学 | Method for measuring chloride ion content by adopting B-Z chemical oscillation reaction |
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| CN111638303A (en) * | 2020-06-08 | 2020-09-08 | 安徽大学 | Distinguish metal ion Al3+And Zn2+Method (2) |
| CN111638303B (en) * | 2020-06-08 | 2022-06-24 | 安徽大学 | Distinguish metal ion Al3+And Zn2+Method (2) |
| CN111766277A (en) * | 2020-06-09 | 2020-10-13 | 安徽大学 | Distinguishing metal ion Fe3+And Cu2+Method (2) |
| CN111781254A (en) * | 2020-07-06 | 2020-10-16 | 安徽大学 | Distinguishing halogen anions F-、Br-Method (2) |
| CN111751433A (en) * | 2020-07-07 | 2020-10-09 | 重庆大学 | Method for measuring chloride ion content by adopting B-Z chemical oscillation reaction |
| CN111781255A (en) * | 2020-07-07 | 2020-10-16 | 安徽大学 | Distinguishing halogen anions Cl-、I-Method (2) |
| CN111781255B (en) * | 2020-07-07 | 2024-04-09 | 安徽大学 | Method for distinguishing halogen anions Cl & lt- & gt and I & lt- & gt |
| CN112525957A (en) * | 2020-10-09 | 2021-03-19 | 安徽大学 | Method for distinguishing different valence states of phosphorus, oxygen-containing acid phosphoric acid and phosphorous acid |
| CN112557478A (en) * | 2020-10-10 | 2021-03-26 | 安徽大学 | Method for distinguishing different valence states of phosphorus, oxysalt sodium phosphite and sodium hypophosphite |
| CN112557478B (en) * | 2020-10-10 | 2024-04-09 | 安徽大学 | Method for distinguishing sodium phosphite and sodium hypophosphite of oxygen acid salts with different valence states of phosphorus |
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