CN108362824B - Method for determining carbonate radical and bicarbonate radical in borate-containing brine - Google Patents
Method for determining carbonate radical and bicarbonate radical in borate-containing brine Download PDFInfo
- Publication number
- CN108362824B CN108362824B CN201810038564.2A CN201810038564A CN108362824B CN 108362824 B CN108362824 B CN 108362824B CN 201810038564 A CN201810038564 A CN 201810038564A CN 108362824 B CN108362824 B CN 108362824B
- Authority
- CN
- China
- Prior art keywords
- standard solution
- hydrochloric acid
- titration
- volume
- borate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
- G01N31/16—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using titration
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Molecular Biology (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
Abstract
A method for measuring carbonate and bicarbonate radical in borate-containing brine comprises the following steps: accurately transferring two parallel samples, respectively placing the two samples into a container, diluting the samples to 35 ml-45 ml by ultrapure water boiled to remove carbon dioxide, directly performing end point titration on the first titration system by using a hydrochloric acid standard solution until the pH value is 4.4, analyzing the total alkalinity, and recording the volume V of the consumed hydrochloric acid standard solution1The volume V of the NaOH-depleted standard solution is recorded, followed by the determination of the borate content in the sample3(ii) a The second titration system firstly feeds NaOH standard solution V into the titration system4Mannitol is added, stirred, an end-point titration is carried out with a standard solution of hydrochloric acid to pH 8.4, and the volume V of the standard solution depleted in hydrochloric acid is recorded2(ii) a Calculating CO3 2－And HCO3 ‑The concentration of (c). The invention can eliminate B4O7 2‑To quickly and accurately titrate CO in the borate-containing brine3 2‑And HCO3 ‑。
Description
Technical Field
The invention belongs to the field of electrochemical analysis, and particularly relates to CO in borate-containing brine3 2-And HCO3 -The method of (1).
Background
The salt lake brine is classified according to chemical components and can be divided into chloride types,Sulfate type and carbonate type. The common coexisting ion is Na+、K+、Li+、Mg2+、Ca2+、CO3 2-、HCO3 -、B4O7 2-、Cl-. The borate in the brine is mainly B4O7 2-Form (A) exists4O7 2-The hydrolysis in water solution is stronger in alkalinity.
H3BO3K ofa＝5.8×10-10Very small, but its conjugate base H2BO3 -Showing a strong basicity, Kb＝1.74×10-5And can be accurately titrated by strong acid.
CO in brine3 2-And HCO3 -The determination method (2) generally adopts a double indicator method and directly titrates by hydrochloric acid, but the method is limited to the method without B4O7 2-The case (1). If the bittern contains B4O7 2-，B4O7 2-Reaction with hydrochloric acid may consume part of the hydrochloric acid, thereby para-CO3 2-And HCO3 -The measurement of (2) causes interference, and the contents of both cannot be accurately measured. Determination of CO by hydrochloric acid using phenolphthalein as indicator3 2-And HCO3 -In time, the end point is not obvious, and the judgment is not accurate; methyl orange is used as an indicator, and the measured total alkalinity contains borate alkalinity, so that the total alkalinity cannot be accurately measured.
CO3 2-And HCO3 -The content is an important parameter of the chemical composition of the brine, since B4O7 2-Increasing the difficulty of its analysis. Therefore, a method suitable for producing CO in the brine containing borate is developed3 2-And HCO3 -The method of measurement (2) is of great significance.
Using automatic potentials of mader et alInstrument for measuring CO in boron-containing brine3 2-And HCO3 -Reference is made to borate in brine (as B)2O3Based) content B2O3Less than or equal to 3mg/ml, and can accurately measure CO3 2-And HCO3 -. (see automated potentiometric titration for CO determination in boron-containing brines3 2-And HCO3 -[J]Qinghai environment, 1994, 4 (1): 34-36) found by experimental research that B is contained in the composition4O7 2-In the titration system, after mannitol is added, because complex acid with strong dissociation capability is generated, the consumed volume of hydrochloric acid generates errors, and CO cannot be well determined3 2-And HCO3 -And (4) content.
The fourth edition of rock mineral analysis describes a mass method for determining CO in brine containing borate3 2-And HCO3 -The method designs a set of CO containing a liquid adding, heating and absorbing unit2A measuring device for measuring CO3 2-And HCO3 -Conversion to CO2Escaped CO2After being absorbed by the absorption tube with constant weight, the weight is weighed, and CO is indirectly calculated3 2-And HCO3 -The content of (a). The method has the disadvantages of complicated process, low efficiency and no wide adaptability.
Disclosure of Invention
Aims to solve the problem that CO can not be accurately titrated in the brine containing borate3 2-And HCO3 -The invention adopts a full-automatic electric potential titrator, does not need to add an indicator, overcomes the error caused by judging the color of the end point by manually titrating naked eyes, and can eliminate B by designing a unique titration working flow4O7 2-The interference of (2) establishes a method for quickly and accurately titrating CO in the brine containing the borate3 2-And HCO3 -The method of (1).
The technical scheme adopted by the invention for solving the technical problems is as follows: CO in borate-containing brine3 2-And HCO3 -The measuring method of (2), comprising the steps of:
accurately transferring two parallel samples, respectively placing the two samples into a container, diluting the samples to 35 ml-45 ml by ultrapure water boiled to remove carbon dioxide, directly performing end point titration on the first titration system by using a hydrochloric acid standard solution until the pH value is 4.4, analyzing the total alkalinity, and recording the volume V of the consumed hydrochloric acid standard solution1Continuing to measure the borate content in the sample by using the NaOH standard solution, and recording the volume V of the consumed NaOH standard solution3(ii) a The second titration system firstly utilizes the liquid feeding function of the automatic potentiometric titrator to quantitatively feed NaOH standard solution V into the titration system4Mannitol is added, stirred, an end-point titration is carried out with a standard solution of hydrochloric acid to pH 8.4, and the volume V of the standard solution depleted in hydrochloric acid is recorded2；
CO was calculated as follows3 2－And HCO3 -The concentration of (a):
CO3 2-(mg/ml)＝[V2+(V3/2-V4)×C2/C1]×C1× 60.0094 × 1000/V (water sample) (1);
HCO3 -(mg/ml)＝[V1-2V2-2(V3/2-V4)×C2/C1-V3×C2/2C1]×C1× 61.0137 × 1000/V (water sample) (2);
in the formula: c1Concentration of hydrochloric acid standard solution, mol/L;
C2-concentration of NaOH standard solution, mol/L;
V1titrating the first sample to consume the total volume of the hydrochloric acid standard solution, namely the total alkalinity, ml;
V2-titration of the second sample with the volume of hydrochloric acid standard solution consumed, ml;
V3-the volume of NaOH standard solution consumed for titration of borate in the first sample, ml;
V4the volume of NaOH standard solution, ml, was accurately fed into the second sample.
Specifically, the following description is provided: 1. into a titration systemThe volume of NaOH standard solution fed in was exactly that of titration B4O7 2-Half the volume of the NaOH standard solution consumed, the inventors found that this calculation process is quite simplified.
2. The volume of the titration system before titration is controlled between 35ml and 45 ml.
3. The stirring parameter of the automatic potentiometric titrator is 30% (note: the special setting parameter of the automatic potentiometric titrator, the stirring parameter of the titration system is specially set to be 30% in order to prevent the solution from splashing and enable the titration system to reach a uniform state because a self-contained stirrer can stir in the titration process), and the titration speed is 0.01 ml/s.
Further, the container is a 100ml plastic cup.
Further, the total alkalinity refers to CO in the titration system3 2-、HCO3 -And B4O7 2-Total volume of hydrochloric acid standard solution consumed by reaction with hydrochloric acid.
Further, 2g to 5g of mannitol was added.
The invention can accurately analyze 10 mg-100 mg of CO3 2－And HCO3 -The content of (A) enables the analysis precision to be within 0.3%, especially for the content of B4O7 2-When the interference is 10 mg-100 mg, the interference is eliminated by adding mannitol and a certain amount of NaOH standard solution, the method has the advantages of less reagents, less steps and high precision, and the method has wide application range.
Detailed Description
The present invention is further illustrated by the following examples.
The reagents and instruments used in the present invention are as follows:
unless otherwise specified, the water used in the present invention is ultrapure water boiled to remove carbon dioxide;
1.1 anhydrous sodium carbonate reference substance;
1.2 mannitol (AR);
1.3 hydrochloric acid standard solution, 0.05 mol/L: 4.0m L concentrated hydrochloric acid (rho is 1.19g/m L) is quantitatively measured (note: concentrated hydrochloric acid itself is an aqueous solution, the substance concentration is 12.5 mol/L.) is added into a 1000ml glass volumetric flask, and water is added and diluted to l000m L for calibration;
1.4NaOH standard solution, 0.03 mol/L, accurately weighing 1.2g of solid sodium hydroxide (injection: analytical purity) in a 250ml beaker, adding 100ml of water for dissolving, transferring into a 1000m L plastic volumetric flask, fixing the volume, shaking up uniformly, covering a bottle stopper tightly, and waiting for calibration;
the instrument is a METT L ER TO L EDO 70Automatic titrator Mettler full-Automatic potential titrator;
pH electrode: DG 115-SC;
in the present invention, the concentration is expressed as a mass concentration in percentage, unless otherwise specified.
The hydrochloric acid standard solution is calibrated according to the following method:
accurately weighing about 0.1g (accurate to 0.0001g) of 3 parts of anhydrous sodium carbonate reference substance (1.1) dried at 250 deg.C for 4 hr, placing in 100ml plastic beaker, adding 40ml of anhydrous sodium carbonate reference substance, boiling to remove CO2Followed by titration (1.3) with the hydrochloric acid solution to be calibrated to pH 8.4 as end point, the consumption of the hydrochloric acid standard solution (1.3) volume to be calibrated is recorded.
The hydrochloric acid standard solution concentration calculation formula:
in the formula (3)
-the mass (g) of the sodium carbonate weighed;
-the molar mass of sodium carbonate (g/mol); v. ofHCl-consumption of volume (ml) of hydrochloric acid standard solution (1.3); c. CHClConcentration (mol/L) of hydrochloric acid standard solution (1.3) (note: since end-point titration is used here, the end-point of titration is at pH 8.4, where one mole of carbonate reacts with only one mole of hydrogen ions to form one mole of bicarbonate and one mole of water, and the moles of sodium carbonate to the moles of hydrochloric acid are 1: 1.)
The following was performed for the calibration hydrochloric acid analysis procedure:
the calibration method 1: 0.0834g, 0.1178g and 0.0809g of anhydrous sodium carbonate reference substance (1.1) dried for 4 hours at 250 ℃ are accurately weighed and respectively placed in 100ml of plastic beakers, adding water for dissolving, diluting to 40ml, and performing equivalent point titration to calibrate the accurate concentration of the hydrochloric acid standard solution (note: the special term of an automatic potentiometric titrator, acid-base titration generally has two modes, namely equivalent point titration and end point titration, wherein the equivalent point titration refers to that a standard solution is used for titrating a solution to be measured in the titration analysis process, when the reaction is complete, the two are combined in equivalent weight, the end point is determined according to the mutation of the potential, an indicator is not needed, the end point titration refers to that a pH value is preset as the titration end point, the standard solution is used for titrating a titration system, and when the pH value of the titration system reaches a set value, the titration end point is obtained, and the average concentration value of the hydrochloric acid standard solution (1.3) is c.HCl＝0.0425(mol/L)。
The calibration method 2 comprises the following steps: 6 parts of anhydrous sodium carbonate reference substance (1.1) dried at 250 ℃ for 4 hours is accurately weighed, the accurate concentration of hydrochloric acid is calibrated by using end point titration of an automatic potentiometric titrator, six groups of experiments are carried out in total, and six groups of experimental data are obtained, and the data are shown in table 1.
TABLE 1 end-point titration of the calibration hydrochloric acid standard solution
As can be seen from Table 1, the concentration of the hydrochloric acid standard solution (1.3) obtained by performing the endpoint titration to pH 8.4 was consistent with the hydrochloric acid concentration calibrated at the equivalence point, demonstrating that performing the endpoint titration to pH 8.4 as titrating CO3 2－Is reliable.
The analysis of the unknown sample was performed as follows:
preparation of a standard solution: the mass of 5 parts of sodium carbonate, sodium bicarbonate and sodium borate are accurately weighed as shown in Table 2. The 5 samples were boiled to remove CO2Dissolving the water, transferring into a 500ml volumetric flask for constant volume, shaking up, numbering as No. 1 to No. 5 standard samples for analysis.
TABLE 2 sodium carbonate, sodium bicarbonate, sodium borate mixing Standard solution preparation
Example 1: accurately transferring 10ml of No. 1 standard sample into 100ml of plastic beakers, respectively, adding water to dilute to 40ml, performing endpoint titration on the first standard sample with hydrochloric acid standard solution (1.3) to pH 4.4, and analyzing total alkalinity (total alkalinity refers to CO in the titration system)3 2-、HCO3 -And B4O7 2-The total volume of hydrochloric acid standard solution consumed by reaction with hydrochloric acid, the same applies hereinafter), the volume V of hydrochloric acid standard solution (1.3) consumed was recorded1The borate content of the sample was then determined with the sodium hydroxide standard solution (1.4) (an automatic titrator analysis "analysis method of boron content in borate", the same applies below) and the volume V of the NaOH consumed standard solution (1.4) was recorded3(ii) a Quantitatively feeding (note: is a special term of the automatic titrator) 10ml of NaOH standard solution (1.4) into a titration system by utilizing a liquid feeding function (liquid feeding direction is directed to the titration system of the automatic titrator, and the volume is accurate to 0.01ml) of an automatic potentiometric titrator feeding liquid (liquid feeding direction is directed to the titration system) of a second standard sample (is a special function of the automatic titrator), adding 2g of mannitol, stirring, performing end point titration to pH 8.4 by using hydrochloric acid standard solution (1.3), and recording the volume V of consumed hydrochloric acid standard solution (1.3)2The experimental results were calculated by the following formulas (1) and (2). Preparing CO in standard solution according to calculation result and theory3 2-And HCO3 -The calculated relative error is shown in tables 3 and 4.
Example 2: accurately transferring 10ml two parts of No. 2 standard sample, respectively placing in 100ml plastic beaker, adding water to dilute to 40ml, performing endpoint titration on the first part of standard sample with hydrochloric acid standard solution (1.3) to pH 4.4, analyzing total alkalinity, and recording volume V of consumed hydrochloric acid standard solution (1.3)1Determination of the Borate content of the samples by means of NaOH Standard solution (1.4)Quantity (analysis of boron content in Borate by automatic titrator analysis method) and volume V of NaOH consumption of standard solution (1.4) was recorded3(ii) a Quantitatively feeding 10ml of NaOH standard solution (1.4) into the titration system by utilizing the function of feeding liquid (feeding liquid points to the titration system, a certain solution is accurately added in advance, the volume is accurate to 0.01ml) of the automatic potentiometric titrator in the second standard sample, adding 3g of mannitol, stirring uniformly, performing end-point titration to pH 8.4 by using the hydrochloric acid standard solution (1.3), and recording the volume V of the consumed hydrochloric acid standard solution (1.3)2The experimental results were calculated by the following formulas (1) and (2). Preparing CO in standard solution according to calculation result and theory3 2-And HCO3 -The calculated relative error is shown in tables 3 and 4.
Example 3: accurately transferring 10ml two parts of No. 3 standard sample, respectively placing in 100ml plastic beaker, adding water to dilute to 40ml, performing endpoint titration on the first part of standard sample with hydrochloric acid standard solution (1.3) to pH 4.4, analyzing total alkalinity, and recording volume V of consumed hydrochloric acid standard solution (1.3)1The borate content of the sample was then determined with NaOH standard solution (1.4) (an automatic titrator analysis "analysis method of boron content in borate") and the volume V of the NaOH standard solution (1.4) consumed was recorded3(ii) a Quantitatively feeding 20ml of NaOH standard solution (1.4) into the titration system by utilizing the function of feeding liquid (the feeding liquid points to the titration system and is accurately added with a certain solution in advance, the volume of the solution is accurate to 0.01ml) of the automatic potentiometric titrator into the second standard sample, adding 3.5g of mannitol, uniformly stirring, performing end point titration by using the hydrochloric acid standard solution (1.3) until the pH value is 8.4, and recording the volume V of the consumed hydrochloric acid standard solution (1.3)2The experimental results were calculated by the following formulas (1) and (2). Preparing CO in standard solution according to calculation result and theory3 2－And HCO3 -The calculated relative error is shown in tables 3 and 4.
Example 4: accurately transferring 10ml two parts of No. 4 standard sample, respectively placing in 100ml plastic beaker, adding water to dilute to 40ml, performing endpoint titration on the first part of standard sample with hydrochloric acid standard solution (1.3) to pH 4.4, analyzing total alkalinity, and recording volume V of consumed hydrochloric acid standard solution (1.3)1Followed by NaOH standard solution (1)4) determination of the borate content in the sample (analysis by an automatic titrator "analysis method of boron content in Borate"), recording the volume V of the NaOH-depleted standard solution (1.4)3(ii) a Quantitatively feeding 20ml of NaOH standard solution (1.4) into the titration system by utilizing the function of feeding liquid (the feeding liquid points to the titration system and is accurately added with a certain solution in advance, the volume of the solution is accurate to 0.01ml) of the automatic potentiometric titrator into the second standard sample, adding 4g of mannitol, stirring uniformly, performing end point titration by using the hydrochloric acid standard solution (1.3) to reach pH 8.4, and recording the volume V of the consumed hydrochloric acid standard solution (1.3)2The experimental results were calculated by the following formulas (1) and (2). Preparing CO in standard solution according to calculation result and theory3 2-And HCO3 -The calculated relative error is shown in tables 3 and 4.
Example 5: accurately transferring 10ml two parts of No. 5 standard sample, respectively placing in 100ml plastic beaker, adding water to dilute to 40ml, performing endpoint titration on the first part of standard sample with hydrochloric acid standard solution (1.3) to pH 4.4, analyzing total alkalinity, and recording volume V of consumed hydrochloric acid standard solution (1.3)1The borate content of the sample was then determined with NaOH standard solution (1.4) (an automatic titrator analysis "analysis method of boron content in borate") and the volume V of the NaOH standard solution (1.4) consumed was recorded3(ii) a Quantitatively feeding 20ml of NaOH standard solution (1.4) into the titration system by utilizing the function of feeding liquid (the feeding liquid points to the titration system and is accurately added with a certain solution in advance, the volume of the solution is accurate to 0.01ml) of the automatic potentiometric titrator into the second standard sample, adding 5g of mannitol, stirring uniformly, performing end point titration by using the hydrochloric acid standard solution (1.3) to reach pH 8.4, and recording the volume V of the consumed hydrochloric acid standard solution (1.3)2The experimental results were calculated by the following formulas (1) and (2). Preparing CO in standard solution according to calculation result and theory3 2-And HCO3 -The calculated relative error is shown in tables 3 and 4.
TABLE 3 CO3 2-Relative error of
TABLE 4 HCO3 -Relative error of
As can be seen from tables 3 and 4, the process is carried out on CO3 2－And B4O7 2-The mass-to-volume ratio of (A) is from 0.16 to 7.01, and CO can be accurately measured3 2-And HCO3 -Content, completely excluding B4O7 2-The interference of (2) makes the method have general applicability in carbonate type brine analysis experiments and also have wide applicability in brine evaporation experiments.
The invention also considers the influence of the labeling on the titration accuracy, and carries out labeling test on part of samples in a salt lake brine evaporation test, because the brine and the salt water have high salt content and high viscosity, and if a pipette is used for directly sampling during sampling, a large error is caused, so in the experimental process, a weighing mode is adopted for sampling, the process is that 6.1498g of an M-L-0 sample, 5.5791g of an M-L-1 sample, 6.2134g of an M-L-2 sample and 6.4086g of an M-L-3 sample are accurately weighed, and each sample is respectively added with standard CO3 2-0.5985mg, 1.1970mg, 1.7955mg, 2.3940 mg. According to the steps of the method, experiments are carried out, the accuracy of the method under different additive quantities is inspected, and CO is measured3 2-The recovery rates are shown in Table 5.
TABLE 5 application of CO in certain salt lakes3 2-Recovery rate of
Investigating accuracy of the method under different additive quantities to determine HCO3 -The content result and the recovery rate are implemented by accurately weighing 5.9203g of an M-L-0 sample, 4.0577g of an M-L-1 sample, 5.0040g of an M-L-2 sample and 4.3546g of an M-L-3 sample, and adding standard HCO (hydrochloric acid) into each sample respectively3 －5.500mg, 11.00mg, 16.50mg, 22.00 mg. Experiments were carried out to determine HCO according to the procedure of the inventive method3 －Recovery, see table 6.
TABLE 6 application of HCO in certain salt lakes3 -Recovery rate of
As can be seen from tables 5 and 6, CO3 2-Recovery of between 99.53 and 100.46, HCO3 -The recovery rate of the method is between 99.66 and 100.49, and the method has higher accuracy in practical application.
Claims (5)
1. A method for measuring carbonate radicals and bicarbonate radicals in borate-containing brine is characterized by comprising the following steps:
accurately transferring two parallel samples, respectively placing the two samples into a container, diluting the samples to 35 ml-45 ml by ultrapure water boiled to remove carbon dioxide, directly performing end point titration on the first titration system by using a hydrochloric acid standard solution until the pH value is 4.4, analyzing the total alkalinity, and recording the volume V of the consumed hydrochloric acid standard solution1Continuing to measure the borate content in the sample by using the NaOH standard solution, and recording the volume V of the consumed NaOH standard solution3(ii) a The second titration system firstly utilizes the liquid feeding function of the automatic potentiometric titrator to quantitatively feed NaOH standard solution V into the titration system4Mannitol is added, stirred, an end-point titration is carried out with a standard solution of hydrochloric acid to pH 8.4, and the volume V of the standard solution depleted in hydrochloric acid is recorded2；
CO was calculated as follows3 2-And HCO3 -The concentration of (a):
CO3 2-(mg/ml)=[V2+（V3/2-V4）×C2/C1]×C1× 60.0094 × 1000/V (water)Sample) (1);
HCO3 -(mg/ml)=[V1-2V2-2(V3/2-V4)×C2/C1-V3×C2/2C1]×C1× 61.0137 × 1000/V (water sample) (2);
in the formula: c1Concentration of hydrochloric acid standard solution, mol/L;
C2-concentration of NaOH standard solution, mol/L;
V1titrating the first sample to consume the total volume of the hydrochloric acid standard solution, namely the total alkalinity, ml;
V2-titration of the second sample with the volume of hydrochloric acid standard solution consumed, ml;
V3-the volume of NaOH standard solution consumed for titration of borate in the first sample, ml;
V4the volume of NaOH standard solution, ml, was accurately fed into the second sample.
2. The method of claim 1, wherein the container is a 100ml plastic cup.
3. The method according to claim 1 or 2, wherein the total alkalinity is CO in the titration system3 2-、HCO3 -And B4O7 2-Total volume of hydrochloric acid standard solution consumed by reaction with hydrochloric acid.
4. The method for measuring carbonate radicals and bicarbonate radicals in a borate-containing brine as claimed in claim 1 or 2, wherein mannitol is added in an amount of 2g to 5 g.
5. The method for measuring carbonate radicals and bicarbonate radicals in a borate-containing brine as claimed in claim 1 or 2, wherein the stirring parameter of the automatic potentiometric titrator is 30% and the titration rate is 0.01 ml/s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810038564.2A CN108362824B (en) | 2018-01-16 | 2018-01-16 | Method for determining carbonate radical and bicarbonate radical in borate-containing brine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810038564.2A CN108362824B (en) | 2018-01-16 | 2018-01-16 | Method for determining carbonate radical and bicarbonate radical in borate-containing brine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108362824A CN108362824A (en) | 2018-08-03 |
| CN108362824B true CN108362824B (en) | 2020-07-14 |
Family
ID=63006141
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810038564.2A Expired - Fee Related CN108362824B (en) | 2018-01-16 | 2018-01-16 | Method for determining carbonate radical and bicarbonate radical in borate-containing brine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108362824B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110411976A (en) * | 2019-08-08 | 2019-11-05 | 中国科学院青海盐湖研究所 | The quantitative analysis method of carbonate and bicarbonate radical in a kind of boracic bittern system |
| CN110824101B (en) * | 2019-11-14 | 2022-05-13 | 兰州蓝星纤维有限公司 | Method for measuring functional groups on surface of carbon fiber |
| CN111474292B (en) * | 2020-04-13 | 2022-10-04 | 湖北省兴发磷化工研究院有限公司 | Method for ensuring carbonate ion content to be controlled during sodium hydroxide standard solution calibration |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1888895A (en) * | 2005-06-27 | 2007-01-03 | 天津师范大学 | Method and instrument for determining PH value and inorganic carbon form through measuring density of CO2 |
| CN104090016A (en) * | 2014-07-24 | 2014-10-08 | 重庆大学 | Method for simultaneously measuring total alkalinity, bicarbonate alkalinity and total volatile fatty acids in anaerobic fermentation liquid |
| CN105067756A (en) * | 2015-08-03 | 2015-11-18 | 广西中烟工业有限责任公司 | Potentiometric titration determining method of boric acid in water-based adhesive |
| CN106093326A (en) * | 2016-05-31 | 2016-11-09 | 中国海洋大学 | A kind of detection method of coastal seawater pH value |
| CN108181428A (en) * | 2017-12-29 | 2018-06-19 | 南通瑞翔新材料有限公司 | A kind of detection method of boracic tertiary cathode material remnants alkali contents |
-
2018
- 2018-01-16 CN CN201810038564.2A patent/CN108362824B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1888895A (en) * | 2005-06-27 | 2007-01-03 | 天津师范大学 | Method and instrument for determining PH value and inorganic carbon form through measuring density of CO2 |
| CN104090016A (en) * | 2014-07-24 | 2014-10-08 | 重庆大学 | Method for simultaneously measuring total alkalinity, bicarbonate alkalinity and total volatile fatty acids in anaerobic fermentation liquid |
| CN105067756A (en) * | 2015-08-03 | 2015-11-18 | 广西中烟工业有限责任公司 | Potentiometric titration determining method of boric acid in water-based adhesive |
| CN106093326A (en) * | 2016-05-31 | 2016-11-09 | 中国海洋大学 | A kind of detection method of coastal seawater pH value |
| CN108181428A (en) * | 2017-12-29 | 2018-06-19 | 南通瑞翔新材料有限公司 | A kind of detection method of boracic tertiary cathode material remnants alkali contents |
Non-Patent Citations (1)
| Title |
|---|
| 混合碱中碳酸根和碳酸氢根含量的测定——双混合指示剂法;刘镇琨;《郑州工学院学报》;19810430;第120-126页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108362824A (en) | 2018-08-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108362824B (en) | Method for determining carbonate radical and bicarbonate radical in borate-containing brine | |
| CN102519894A (en) | Ferric ion stabilizing capability measurement method of acidification ferric ion stabilizer | |
| CN107991429B (en) | Method for determining cyanide easily released in cyanide-containing wastewater containing sulfide | |
| CN106324185B (en) | A kind of assay method of Emulsion of UPR acid value | |
| CN108152444A (en) | Method for detecting content of free nitric acid in bismuth nitrate solution | |
| CN101995445A (en) | Method for detecting nitrogen in organic fertilizer | |
| CN101825579A (en) | Method for measuring concentration of polyacrylamide solution | |
| CN111337558B (en) | Method for measuring sodium content in feed by using ion selective electrode | |
| CN103115921A (en) | Method for measuring content of silicon dioxide in iron ores | |
| CN109541128B (en) | Method for measuring manganese content in basic manganese chloride | |
| CN107817220B (en) | Method for measuring mass concentration of easily released cyanide in thiocyanate-containing water | |
| CN104914093B (en) | The method of testing of constant cadmium and zinc in tellurium-zincium-cadmium crystal | |
| CN203519455U (en) | Device for measuring content of carbonate in mineral | |
| CN113030071A (en) | Method for determining cyanide easily released in thiocyanate-containing water | |
| CN106404998A (en) | Detection method of tin content in high concentration tin hydroxide | |
| CN102062736A (en) | Method for fast determining contents of nitrogen, phosphorus and potassium in phosphorus-potassium-carbon ammonium | |
| CN102608280B (en) | Stabilizer for measuring content of total sugar and reducing sugar by direct titration method and preparation method of stabilizer | |
| CN103412084B (en) | Method for determining effective substance content of petroleum sulfonate | |
| Kenyon et al. | Photometric determination of silica in alkalies | |
| CN111239331A (en) | Method for detecting content of calcium oxide in quick lime | |
| CN110702847A (en) | Method for quickly measuring sulfate radical content of vanadium battery electrolyte through temperature titration | |
| CN108181427A (en) | Calcium ions and magnesium ions assay method in high ph-values water quality | |
| CN101576480B (en) | Method for measuring contents of cationic surface active substances by bromothymol blue spectrometry | |
| CN108444999A (en) | The method that Berthelot spectrophotometry measures ammonia-nitrogen content in air | |
| CN107656008A (en) | The assay method of calcium oxide content in a kind of calcium stearate |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200714 Termination date: 20210116 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |