CN112924516A - Method for electrochemically detecting hydrolysis rate of borate polymer - Google Patents
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- 230000007062 hydrolysis Effects 0.000 title claims abstract description 78
- 238000006460 hydrolysis reaction Methods 0.000 title claims abstract description 78
- 238000000034 method Methods 0.000 title claims abstract description 62
- BTBUEUYNUDRHOZ-UHFFFAOYSA-N Borate Chemical compound [O-]B([O-])[O-] BTBUEUYNUDRHOZ-UHFFFAOYSA-N 0.000 title claims abstract description 44
- 229920000642 polymer Polymers 0.000 title claims abstract description 40
- 239000004327 boric acid Substances 0.000 claims abstract description 52
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical class OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims abstract description 50
- 238000001514 detection method Methods 0.000 claims abstract description 33
- 239000011259 mixed solution Substances 0.000 claims abstract description 18
- 239000007864 aqueous solution Substances 0.000 claims abstract description 14
- 238000000835 electrochemical detection Methods 0.000 claims abstract description 14
- 150000005846 sugar alcohols Polymers 0.000 claims abstract description 12
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910052796 boron Inorganic materials 0.000 claims abstract description 6
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 36
- FBPFZTCFMRRESA-KVTDHHQDSA-N D-Mannitol Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-KVTDHHQDSA-N 0.000 claims description 18
- 229930195725 Mannitol Natural products 0.000 claims description 18
- 239000000594 mannitol Substances 0.000 claims description 18
- 235000010355 mannitol Nutrition 0.000 claims description 18
- 238000001035 drying Methods 0.000 claims description 10
- 230000035772 mutation Effects 0.000 claims description 4
- 238000001291 vacuum drying Methods 0.000 claims description 4
- -1 boric acid ester Chemical class 0.000 abstract description 9
- 238000007789 sealing Methods 0.000 abstract description 3
- 239000002957 persistent organic pollutant Substances 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 15
- 238000001228 spectrum Methods 0.000 description 15
- 229920005862 polyol Polymers 0.000 description 11
- 150000003077 polyols Chemical class 0.000 description 10
- 230000035945 sensitivity Effects 0.000 description 4
- 239000013522 chelant Substances 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 238000009396 hybridization Methods 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 125000004430 oxygen atom Chemical group O* 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- ACZDXRVCACAKLV-UHFFFAOYSA-N [B].[C].[O] Chemical compound [B].[C].[O] ACZDXRVCACAKLV-UHFFFAOYSA-N 0.000 description 1
- VUUUWEJVDQMBLC-UHFFFAOYSA-N [O].[Si].[B] Chemical compound [O].[Si].[B] VUUUWEJVDQMBLC-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000009920 chelation Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000010668 complexation reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000840 electrochemical analysis Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 239000012086 standard solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
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- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/416—Systems
- G01N27/4161—Systems measuring the voltage and using a constant current supply, e.g. chronopotentiometry
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Abstract
The invention discloses a method for electrochemically detecting the hydrolysis rate of borate polymers, which comprises the steps of adding borate polymers into a polyalcohol aqueous solution to obtain a mixed solution, sealing the mixed solution, carrying out electrochemical detection, respectively obtaining the hydrolysis time and the hydrolysis degree of the borate polymers according to the change time and the change amplitude of a curve of an electrochemical detection spectrogram, and calculating the hydrolysis rate of the borate polymers according to the hydrolysis time and the hydrolysis degree; wherein, the spectrogram curve of the electrochemical detection is a current curve of constant voltage detection or a voltage curve of constant current detection. The detection in the method can quantitatively record the hydrolysis time and the hydrolysis degree of various boric acid esters, improves the detection precision and accuracy compared with other methods for detecting the hydrolysis of the boric acid esters, is convenient and controllable, greatly reduces errors caused by organic pollutants, and can be applied to the detection fields of hydrolysis of boric acid ester polymers, content of boron elements in water and the like.
Description
Technical Field
The invention belongs to the field of high polymer material hydrolysis detection, and particularly relates to a method for electrochemically detecting the hydrolysis rate of a borate polymer.
Background
The information in this background section is only for enhancement of understanding of the general background of the invention and is not necessarily to be construed as an admission or any form of suggestion that this information forms the prior art that is already known to a person of ordinary skill in the art.
In the research on polymers, borate polymers (for example, boron-oxygen-carbon polymers and boron-oxygen-silicon polymers) have been studied more and more. Hybridization of the boron atom in the borate ester is sp2 hybridization, namely 2s as an outer electron layer22px 22py 22pz 0The boron atom and the other oxygen atoms linking the three boron atoms present a plane, perpendicular to which there is a 2pz 0The empty orbit has lone pair electrons in the oxygen atom of water molecule, and is easy to attack 2pz 0The orbitals are empty, so the borate is very susceptible to hydrolysis. Sometimes in air, to boric acid and other compounds. Therefore, more and more people are invested in research on the hydrolysis-resistant boric acid ester, and the hydrolysis-resistant boric acid ester is not easy to hydrolyze in air and is easy to hydrolyze in a solution related to water.
According to the research of the inventor, three methods, namely a half-life method, an open observation method and a saturated steam method, exist for detecting the hydrolysis rate of the borate at present. These three methods all have certain drawbacks or drawbacks, and the half-life method is not suitable for nitrogenous borate ester; the open observation method and the saturated steam method are visual observation methods, have certain subjectivity and limitation, and are not good for grasping the precision and the accuracy of detection results. Moreover, if the borate ester contains other organic impurities, hydrolysis can cause the observation system to be turbid, and the error is larger. The three methods cannot accurately describe the hydrolysis time, and even the hydrolysis degree cannot give specific results, so that the detection of the hydrolysis rate of the borate polymer is greatly limited.
Disclosure of Invention
In order to solve the defects of the prior art, the invention aims to provide a method for electrochemically detecting the hydrolysis rate of borate polymers, which can detect and simultaneously detect hydrolysis time, hydrolysis degree and hydrolysis rate so as to quantitatively detect the hydrolysis rate of borate.
In order to achieve the purpose, the technical scheme of the invention is as follows:
in one aspect, a method for electrochemically detecting boric acid includes adding boric acid to a polyol aqueous solution to obtain a mixed solution, and electrochemically detecting the mixed solution.
On the other hand, the method for electrochemically detecting the hydrolysis rate of the borate polymer comprises the steps of adding the borate polymer into a polyalcohol aqueous solution to obtain a mixed solution, sealing the mixed solution, carrying out electrochemical detection, respectively obtaining the hydrolysis time and the hydrolysis degree of the borate polymer according to the change time and the change amplitude of a curve of an electrochemical detection spectrogram, and calculating the hydrolysis rate of the borate polymer according to the hydrolysis time and the hydrolysis degree; wherein, the spectrogram curve of the electrochemical detection is a current curve of constant voltage detection or a voltage curve of constant current detection.
In a third aspect, the method is applied to detection of boron in water.
Hydrolysis of almost all borate polymers produces boric acid and other organic compounds which are generally not readily hydrolyzed in water, whereas ionization of boric acid in water as a weak monobasic acid with an ionization constant pK of 9.25 ionizes minute amounts of hydrogen ions, which are not readily detectable. Boric acid can rapidly form a stable chelate with polyhydric alcohol, wherein 1:1 type is taken as a main part, 1:2 type is also taken as a main part, and the structural formula is shown in figure 1. Under chelation, the ionization constant can be increased to 104Doubling, i.e. a pK value of 9.25The increase to 5.15 increases the degree of hydrolysis by four orders of magnitude. Therefore, the hydrolysis condition of the borate is detected in real time by a constant voltage method (or constant current) of an electrochemical workstation by using a proper electrolyte system, the borate is converted into boric acid after hydrolysis, the boric acid is ionized into hydrogen ions and boric acid polyol chelate ions under the promotion of polyol, and a current (or voltage) mutation is displayed on a constant voltage (or constant current) spectrogram, the time of the mutation is the time of the start of hydrolysis, and the hydrolysis degree is higher when the current (or voltage) change is larger. So that the time and the degree of hydrolysis of the borate can be quantitatively detected.
The invention has the beneficial effects that:
the hydrolysis time and the hydrolysis degree of the borate polymer can be quantitatively analyzed, and the boric acid standard substance with the same number of boron atoms in the borate is configured to detect current (or voltage) as standard current (or standard voltage), so that a current (or voltage) time-varying spectrogram of the hydrolysis time and the hydrolysis degree can be obtained, and the hydrolysis performance of the borate polymer can be further known; compared with other methods for detecting the hydrolysis of the borate, the method provided by the invention has the advantages that the detection precision and accuracy are improved, the method is convenient and controllable, and the error caused by organic pollutants is greatly reduced.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
FIG. 1 is a structural formula of a stable chelate formed by boric acid and a polyol;
FIG. 2 is a constant voltage detection spectrum of example 1;
FIG. 3 is a constant voltage detection spectrum of example 2;
FIG. 4 is a constant voltage detection spectrum of example 3;
FIG. 5 is a constant voltage detection spectrum of example 4;
FIG. 6 is a constant voltage detection spectrum of example 5;
FIG. 7 shows different concentrations of boric acid and glycerolComparing the mixed spectrum with the spectrum of pure boric acid and pure glycerol solution, (a) is 1.0 x 10-1mol, (b) is 1.0 x 10-2mol, (c) is 1.0 x 10-3mol, (d) is 1.0 x 10-4mol；
FIG. 8 is a comparison of the mixed spectrum of boric acid and mannitol at different concentrations with the spectrum of pure boric acid and pure mannitol solution, wherein (a) is 1.0 x 10-1mol, (b) is 1.0 x 10-2mol, (c) is 1.0 x 10-3mol, (d) is 1.0 x 10-4mol；
FIG. 9 is a schematic diagram showing the operation of the detection method in embodiment 6 of the present invention;
FIG. 10 is a constant voltage detection spectrum of example 6 of the present invention.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
In view of the difficulty in detecting the hydrolysis time and the hydrolysis degree of the borate polymer by the conventional method, the invention provides a method for electrochemically detecting the hydrolysis rate of the borate polymer.
In an exemplary embodiment of the present invention, a method for electrochemically detecting boric acid is provided, in which boric acid is added to an aqueous solution of a polyhydric alcohol to obtain a mixed solution, and the mixed solution is electrochemically detected.
The electrochemical detection is to use an electrochemical workstation and a two-electrode or three-electrode system to carry out constant voltage detection or constant current detection.
In some embodiments of this embodiment, the polyol is glycerol or mannitol.
In some embodiments of this embodiment, the molar ratio of the polyol to boric acid is 1 to 1.5: 1.
In some examples of this embodiment, the voltage is 1.0-5.0V when detected by a constant voltage method, and the current is 0.1-100 mA when detected by a constant current method.
In another embodiment of the invention, the method for electrochemically detecting the hydrolysis rate of the borate polymer is provided, the borate polymer is added into a polyhydric alcohol aqueous solution to obtain a mixed solution, the mixed solution is sealed and then subjected to electrochemical detection, the hydrolysis time and the hydrolysis degree of the borate polymer are respectively obtained according to the change time and the change amplitude of a curve of an electrochemical detection spectrogram, and the hydrolysis rate of the borate polymer is calculated according to the hydrolysis time and the hydrolysis degree; wherein, the spectrogram curve of the electrochemical detection is a current curve of constant voltage detection or a voltage curve of constant current detection.
In some examples of this embodiment, the borate polymer is pre-treated and then added to the aqueous polyol solution to obtain a mixed solution, and the pre-treatment is drying.
In one or more embodiments, the drying is vacuum drying under the conditions: the temperature is 50-70 ℃, the drying time is 5-10 h, and the drying pressure is-0.1 to-0.06 MPa.
In some embodiments of this embodiment, the polyol is glycerol or mannitol.
In some embodiments of this embodiment, the molar ratio of the polyol to boric acid is 1 to 1.5: 1.
In some examples of this embodiment, the voltage is 1.0-5.0V when detected by a constant voltage method, and the current is 0.1-100 mA when detected by a constant current method.
In some examples of this embodiment, the time at which the hydrolysis is initiated is an abrupt change in current production (a multiple increase in current) as measured by potentiostatic methods or an abrupt change in voltage production (a multiple increase in current) as measured by galvanostatic methods.
In some examples of this embodiment, the hydrolysis rate is calculated by the following equation when measured by a constant voltage method:
ω＝(I-I0)/(Imax-I0)·100％
wherein, omega is hydrolysis rate, I is current of a sample to be measured, I ismaxCurrent of standard solutions prepared for polyol and boric acid standards, I0Is the current of the polyol.
In a third embodiment of the invention, the application of the method in detection of boron in water is provided.
In order to make the technical solution of the present invention more clearly understood by those skilled in the art, the technical solution of the present invention will be described in detail below with reference to specific examples and comparative examples.
The following examples all use a three-electrode system for constant voltage detection.
Example 1
The concentration of the prepared boric acid is 1.0 x 10-4mol、1.0*10-3mol、1.0*10-2mol、1.0*10-1The mol boric acid aqueous solution sets the constant voltage parameters of the electrochemical workstation as follows: the voltage was 3.0V, one point was tested every 0.5s, and the time was set to 36000 s. The obtained spectrum is shown in FIG. 2, and it can be seen from the graph that the solution current measured by the constant voltage method is increased along with the increase of the boric acid concentration, but the change is not obvious.
Example 2
The concentration of the prepared boric acid is 0, 1.0 x 10-4mol、1.0*10-3mol、1.0*10-2mol、1.0*10-1The mol mannitol solution is characterized in that the constant voltage parameters of an electrochemical workstation are set as follows: the voltage was 3.0V, one point was tested every 0.5s, and the time was set to 36000 s. The obtained spectrum is shown in FIG. 3, and it can be seen from the graph that the current of the mannitol aqueous solution of the sample measured by the constant voltage method is continuously increased with the increase of the boric acid concentration, but the change is not obvious.
Example 3
The concentration of the prepared boric acid is 0, 1.0 x 10-4mol、1.0*10-3mol、1.0*10-2mol、1.0*10-1The mol glycerol solution sets the constant voltage parameters of the electrochemical workstation as follows: the voltage was 3.0V, one point was tested every 0.5s, and the time was set to 36000 s. The obtained spectrum is shown in FIG. 4, and it can be seen from the graph that the current of the glycerol aqueous solution of the sample measured by the constant voltage method is continuously increased with the increase of the concentration of the boric acid, but the change is not obvious.
Example 4
The concentration of the prepared boric acid is 1.0 x 10-4mol、1.0*10-3mol、1.0*10-2mol、1.0*10-1The method comprises the following steps of (1) setting constant voltage parameters of an electrochemical workstation as follows, wherein the constant voltage parameters are that the mol aqueous solution of glycerol and boric acid (the concentration of the glycerol and the boric acid is equal to each other): the voltage was 3.0V, one point was tested every 0.5s, and the time was set to 36000 s. The obtained spectrum is shown in FIG. 5, from which it can be seen that the current of the mixed solution of the sample measured by the constant voltage method is increased with the increase of the boric acid concentration, and the measured current is multiplied more than that of example 3.
Example 5
The concentration of the prepared boric acid is 1.0 x 10-4mol、1.0*10-3mol、1.0*10-2mol、1.0*10-1And (3) mol aqueous solution of mannitol and boric acid (the concentration of the mannitol and the concentration of the boric acid are equal), setting constant voltage parameters of the electrochemical workstation as follows: the voltage was 3.0V, one point was tested every 0.5s, and the time was set to 36000 s. The obtained spectrum is shown in FIG. 6, from which it can be seen that the current of the mixed solution of the sample measured by the constant voltage method is increased with the increase of the boric acid concentration, and the measured current is multiplied more than that of example 2.
FIG. 7 is a combination of FIGS. 4 and 5 for comparing the mixing current of boric acid and glycerol at different concentrations with the current of pure boric acid solution and the current of pure glycerol solution, and shows that the sensitivity of boric acid detection can be improved after glycerol is added.
FIG. 8 is a combination of FIGS. 3 and 6 for comparison of the mixing current of different concentrations of boric acid and mannitol with the current of pure boric acid solution and the current of pure mannitol solution, which shows that the addition of mannitol can improve the sensitivity of boric acid detection.
Example 6
A method for electrochemically detecting the hydrolysis rate of borate Polymer (PBS) is shown in FIG. 9, which takes a polyborosiloxane sample as an example. And (3) carrying out vacuum drying on the polyborosiloxane sample, wherein the vacuum drying condition is 60 ℃, the drying time is 8h, and the drying pressure is-0.09 MPa.
Adding a vacuum-dried polyborosiloxane sample into a 50mL electrolytic cell, adding 40mL of mannitol electrolyte with the concentration of 50%, sealing the electrolytic cell, and performing electrochemical test by adopting an electrochemical workstation of a three-electrode system through a constant voltage method, wherein the constant voltage parameters are as follows: the voltage was 3.0V, one point was tested every 0.5s, and the time was set to 36000 s.
The constant voltage detection result is shown in fig. 10, and it can be seen from the figure that the initial current of PBS placed in mannitol solution is larger than that of pure mannitol, and the slope from 0-10000s period is larger than that after 10000s, which indicates that the current change is faster because the total concentration of ions in the solution is increased faster, the hydrolyzed boric acid is ionized into positive and negative ions rapidly under the complexation of mannitol, the concentration conversion degree is larger, the current size conversion is larger, which indicates that the PBS placed in mannitol aqueous solution can promote the hydrolysis of the sample to be detected to improve the detection sensitivity. The slope after 10000s was smaller than before 0-10000s, indicating that the hydrolysis rate was slower relative to 0-10000 s.
According to the detection data, the hydrolysis rate of the sample can be calculated at any time by adopting the formula, for example, the hydrolysis rate of the 5000 th sample is: ω ═ I (I-I)0)/(Imax-I0) 100% (4.27487-0.474045)/(5,12507-0.474045) (81.72%). The results of experiments of the samples repeated three times by adopting the method of the invention are 81.72%, 81.56% and 81.85% of the hydrolysis rate of 5000s, which shows that the measuring method of the invention has good accuracy, sensitivity and repeatability and can meet the test requirements of the hydrolysis rate of related samples.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A method for electrochemically detecting boric acid is characterized in that boric acid is added into a polyhydric alcohol aqueous solution to obtain a mixed solution, and the mixed solution is subjected to electrochemical detection.
2. The method for electrochemically detecting boric acid according to claim 1, wherein the polyhydric alcohol is glycerol or mannitol;
or the molar ratio of the polyhydric alcohol to the boric acid is 1-1.5: 1.
3. The method for electrochemically detecting boric acid according to claim 1, wherein the voltage is 1.0 to 5.0V when detected by a constant voltage method and the current is 0.1 to 100mA when detected by a constant current method.
4. A method for electrochemically detecting the hydrolysis rate of borate polymers is characterized in that borate polymers are added into a polyalcohol aqueous solution to obtain a mixed solution, the mixed solution is sealed and then subjected to electrochemical detection, the hydrolysis time and the hydrolysis degree of the borate polymers are respectively obtained according to the change time and the change amplitude of a curve of an electrochemical detection spectrogram, and the hydrolysis rate of the borate polymers is calculated according to the hydrolysis time and the hydrolysis degree; wherein, the spectrogram curve of the electrochemical detection is a current curve of constant voltage detection or a voltage curve of constant current detection.
5. The method for electrochemically detecting the hydrolysis rate of borate polymers as set forth in claim 4, wherein the borate polymers are pretreated and then added to the aqueous solution of the polyhydric alcohol to obtain a mixed solution, and the pretreatment is drying.
6. The method for electrochemically detecting the hydrolysis rate of borate polymers as claimed in claim 5, wherein the drying is vacuum drying under the following conditions: the temperature is 50-70 ℃, the drying time is 5-10 h, and the drying pressure is-0.1 to-0.06 MPa.
7. The method for electrochemically detecting the hydrolysis rate of borate polymers as set forth in claim 4, wherein the polyhydric alcohol is glycerol or mannitol;
or the molar ratio of the polyhydric alcohol to the boric acid is 1-1.5: 1.
8. The method for electrochemically detecting the hydrolysis rate of borate polymers as claimed in claim 4, wherein the voltage is 1.0 to 5.0V when detected by a constant voltage method, and the current is 0.1 to 100mA when detected by a constant current method.
9. The method for electrochemically detecting the hydrolysis rate of borate polymers as set forth in claim 4, wherein the time at which the current-generating mutation detected by the constant voltage method or the voltage-generating mutation detected by the constant current method starts hydrolysis.
10. The method for electrochemically detecting boric acid according to claim 1 or the method for electrochemically detecting the hydrolysis rate of borate polymers according to claim 4 is applied to detection of boron in water.
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Patent Citations (3)
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| CN1443138A (en) * | 2000-08-07 | 2003-09-17 | 西弗斯仪器公司 | Low-level boron detection and measurement |
| US20040020840A1 (en) * | 2000-08-07 | 2004-02-05 | Kosenka Paul P | Low-level boron detection and measurement |
| CN108414675A (en) * | 2018-01-25 | 2018-08-17 | 中国科学院青岛生物能源与过程研究所 | A method of quickly measuring low concentration boric acid in aqueous solution using pH meter |
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