CN101650337A - Method for testing chloride content in smoke gas desulfurization system - Google Patents
Method for testing chloride content in smoke gas desulfurization system Download PDFInfo
- Publication number
- CN101650337A CN101650337A CN200910075361A CN200910075361A CN101650337A CN 101650337 A CN101650337 A CN 101650337A CN 200910075361 A CN200910075361 A CN 200910075361A CN 200910075361 A CN200910075361 A CN 200910075361A CN 101650337 A CN101650337 A CN 101650337A
- Authority
- CN
- China
- Prior art keywords
- chloride content
- solution
- add
- beaker
- testing
- 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.)
- Granted
Links
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 title claims abstract description 30
- 238000012360 testing method Methods 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000006477 desulfuration reaction Methods 0.000 title abstract description 5
- 230000023556 desulfurization Effects 0.000 title abstract description 5
- 239000000779 smoke Substances 0.000 title abstract 3
- 239000007853 buffer solution Substances 0.000 claims abstract description 16
- 238000003918 potentiometric titration Methods 0.000 claims abstract description 15
- SQGYOTSLMSWVJD-UHFFFAOYSA-N silver(1+) nitrate Chemical compound [Ag+].[O-]N(=O)=O SQGYOTSLMSWVJD-UHFFFAOYSA-N 0.000 claims description 48
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 28
- 229910001961 silver nitrate Inorganic materials 0.000 claims description 24
- 239000012086 standard solution Substances 0.000 claims description 20
- 239000012153 distilled water Substances 0.000 claims description 18
- 239000000706 filtrate Substances 0.000 claims description 18
- 239000012556 adjustment buffer Substances 0.000 claims description 15
- 239000000243 solution Substances 0.000 claims description 15
- 229910052602 gypsum Inorganic materials 0.000 claims description 14
- 239000010440 gypsum Substances 0.000 claims description 14
- 238000004448 titration Methods 0.000 claims description 13
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 9
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 7
- 238000003556 assay Methods 0.000 claims description 7
- 239000003546 flue gas Substances 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 7
- 239000008367 deionised water Substances 0.000 claims description 6
- 229910021641 deionized water Inorganic materials 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 6
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 claims description 6
- 238000005303 weighing Methods 0.000 claims description 5
- 230000001105 regulatory effect Effects 0.000 claims description 4
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 3
- 239000000460 chlorine Substances 0.000 claims description 3
- 229910052801 chlorine Inorganic materials 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims description 3
- 230000001186 cumulative effect Effects 0.000 claims description 3
- 239000004323 potassium nitrate Substances 0.000 claims description 3
- 235000010333 potassium nitrate Nutrition 0.000 claims description 3
- 239000012535 impurity Substances 0.000 abstract description 5
- 150000002500 ions Chemical class 0.000 abstract description 5
- 238000005259 measurement Methods 0.000 abstract description 5
- 238000004458 analytical method Methods 0.000 abstract description 2
- 230000002708 enhancing effect Effects 0.000 abstract 1
- 210000002966 serum Anatomy 0.000 abstract 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 8
- 239000002002 slurry Substances 0.000 description 5
- LQNUZADURLCDLV-UHFFFAOYSA-N nitrobenzene Chemical compound [O-][N+](=O)C1=CC=CC=C1 LQNUZADURLCDLV-UHFFFAOYSA-N 0.000 description 4
- 239000011780 sodium chloride Substances 0.000 description 4
- 241000370738 Chlorion Species 0.000 description 3
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 3
- SOIFLUNRINLCBN-UHFFFAOYSA-N ammonium thiocyanate Chemical compound [NH4+].[S-]C#N SOIFLUNRINLCBN-UHFFFAOYSA-N 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000012956 testing procedure Methods 0.000 description 1
- 231100000167 toxic agent Toxicity 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
Landscapes
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
Abstract
The invention relates to a method for testing chloride content in a smoke gas desulfurization system, belonging to the technical field of testing the chloride content in a smoke gas desulfurization system. The basic principle of the invention is that as the serum and the product of the desulfurization system has various types and high content of impurities, total ion strength buffer solution needsto be added to improve the anti-interference ability of potentiometric titration in an electrode method and maintain the pH value in measurement within a proper range. By adding total ion strength adjusting buffer solution to the sample to be tested (functions of improving the ion strength, enhancing the anti-interference ability and adjusting the pH value), the invention increases the anti-reference ability in the potentiometric titration method and improves the reliability of the testing result. The invention has the characteristics of stable and reliable method, and greatly improves the reliability of the analysis result compared with the prior art.
Description
Technical field
The present invention relates to the determination techniques field of flue gas desulphurization system chloride content.
Background technology
Chloride content in the flue gas desulphurization system is that system is operating must survey project.Determination of chlorine ion content adopts silver nitrate volumetric method or ammonium thiocyanate volumetric method usually.When being used for the mensuration of flue gas desulphurization system slurries and gypsum chlorion, there is following problem respectively in these two kinds of methods: the silver nitrate volumetric method is owing to be subjected to the influence of testing sample color, and its terminal colour changes very not obvious, is easy to generate bigger error at measurment; The ammonium thiocyanate volumetric method is complicated operation not only, and same existence is subjected to the influence of testing sample color easily, titration end-point is difficult for the problem of judgement, for improving the accuracy of measurement result, often need be in titration process, add nitrobenzene, and nitrobenzene is a kind of toxicant that the intense stimulus taste is arranged, very big to tester's actual bodily harm.
Based on above situation, some unit has used potentiometric titration instead, error when potentiometric titration can be eliminated the visual inspection change color fully, but when being actually used in the desulphurization system sample test, since the sample composition complexity, the impurity ion content height is very big to the interference of measurement result, instrument often occurs and misread the phenomenon of titration end-point, bring certain uncertainty to measurement result.
Summary of the invention
The method that the purpose of this invention is to provide a kind of potentiometric determination flue gas desulphurization system chloride content, by in testing sample, adding a kind of total ionic strength adjustment buffer degree buffer solution, improved the stability of potentiometric determination desulphurization system chloride content, the method that is characterized in is reliable and stable, compared with the prior art, improved the reliability of analysis result greatly.
The present invention adopts following technical scheme:
The present invention regulates buffer solution by adding the total ionic strength adjustment buffer degree, and the antijamming capability when having increased the potentiometric titration test has improved reliability of testing result; The compound method that described total ionic strength adjustment buffer degree is regulated buffer solution is: take by weighing 100g potassium nitrate and place the 1000ml beaker, add 50ml acetic acid, add deionized water and be diluted to 500ml, adjusting pH with the sodium hydroxide solution of 40g/L is 5, is diluted to 1L with deionized water at last;
The step of the method for testing of described mensuration desulphurization system chloride content is:
(1) get the gypsum samples of 10-20g drying, add 300ml distilled water, after fully shaking up, filter with quantitative filter paper at a slow speed, and fully wash gypsum samples with distilled water, filtrate is collected constant volume in the 500ml volumetric flask;
(2) get 50-100ml filtrate, place the 250ml beaker, add 10-15ml total ionic strength adjustment buffer degree and regulate buffer solution;
(3) connect potentiometric titrimeter and supporting test electrode.Stirrer is put into beaker, beaker is placed on the magnetic stirrer, make electrode immerse solution, turn on agitator is under middling speed stirs (do not spatter mistake, no bubble produces).Add the silver nitrate standard solution with potentiometric titrimeter and carry out potentiometric titration, the consumption of silver nitrate standard solution when record arrives titration end-point.
(4) do blank assay simultaneously with the distilled water of chloride not.
Chloride content is (with CL
-Meter) calculate:
CL
-％＝3.55(v
2c-v
1c)×500÷(v×s)
Wherein: CL
-%: chloride content in the sample, %;
3.55: convert and get in the molal weight of chlorine * 100 ÷, 1000 backs;
V: the filtrate volume of getting during mensuration, ml;
V
2: sample consumes liquor argenti nitratis ophthalmicus volume, ml;
V
1: blank liquor argenti nitratis ophthalmicus volume, the ml of consuming;
C: standard silver nitrate solution concentration, mol/L;
500: filtrate cumulative volume, ml;
S: example weight, g.
Beneficial effect of the present invention is as follows: Determination of chlorine ion content, adopt silver nitrate volumetric method or ammonium thiocyanate volumetric method usually.When being used for the mensuration of flue gas desulphurization system slurries and gypsum chlorion, these two kinds of methods exist the not obvious and test process of indicator change color may produce problems such as harm to the tester respectively.For this reason, preferably select potentiometric titration for use, but this method is when being actually used in the desulphurization system sample test, owing to be subjected to factor affecting such as sample composition complexity, impurity ion content height, instrument often occurs and misread the phenomenon of titration end-point, bring certain uncertainty to measurement result.The ultimate principle of foundation of the present invention be since in desulphurization system slurries and the product impurity component kind many and content is high, need to add total ionic strength adjustment buffer degree buffer solution and improve the antijamming capability of electrode method potentiometric titration, and keep pH when measuring in OK range.The present invention is by adding a kind of total ionic strength adjustment buffer degree buffer solution in testing sample, increased the total ionic strength adjustment buffer degree of solution to be measured and guaranteed that the pH value is at zone of reasonableness, improve the stability of potentiometric determination desulphurization system chloride content, thoroughly eliminated the interference of impurity component.Compared with the prior art method, has improved precision of test result accurately and reliably.
Embodiment
One, testing tool
Analytical balance: precision is more than 0.1mg reaches;
Potentiometric titrimeter and supporting test electrode (compound silver electrode or indicator electrode+contrast electrode);
The conventional instrument in laboratories such as magnetic stirrer.
Two, reagent
1. sodium chloride standard solution (0.0141mol/L): take by weighing 0.8240g benchmark sodium chloride (through 140 ℃ of dry mistakes), soluble in water, move in the 1000ml volumetric flask, be diluted with water to graticule, shake up.This solution contains the 500ug chlorion for every milliliter.
2. silver nitrate standard solution (0.0141mol/L): take by weighing the 2.395g silver nitrate, soluble in water, add the 2ml red fuming nitric acid (RFNA), move in the 1000ml volumetric flask, be diluted with water to graticule, shake up.Be stored in the brown bottle, keep in Dark Place.Demarcate with the sodium chloride standard solution.
Demarcating steps is as follows:
1) draws 10.00ml sodium chloride standard solution, place the 250ml beaker, add 2ml nitric acid, be diluted to 100ml.
2) connect potentiometric titrimeter and supporting test electrode.Stirrer is put into beaker, beaker is placed on the magnetic stirrer, make electrode immerse solution, turn on agitator, under stirring, middling speed (do not spatter mistake, no bubble produces) carry out potentiometric titration with potentiometric titrimeter adding silver nitrate standard solution, when arriving titration end-point, record consumes silver nitrate standard solution volume V (ml).
3) carry out blank assay by same step, record consumes silver nitrate standard solution volume V
0(ml).
Calculate: silver nitrate concentration of standard solution=0.141/ (V-V
0) mol/L
3. the total ionic strength adjustment buffer degree is regulated buffer solution: take by weighing 100g
Potassium nitrate places the 1000ml beaker, adds 50ml acetic acid, adds deionized water and is diluted to 500ml, and adjusting pH with the sodium hydroxide solution of 40g/L is 5, is diluted to 1L with deionized water at last.
Three, testing procedure and result calculate
(1) get the gypsum samples of 10-20g drying, add 300ml distilled water, after fully shaking up, filter with quantitative filter paper at a slow speed, and fully wash gypsum samples with distilled water, filtrate is collected constant volume in the 500ml volumetric flask;
(2) get 50-100ml filtrate, place the 250ml beaker, add 10-15ml total ionic strength adjustment buffer degree and regulate buffer solution;
(3) connect potentiometric titrimeter and supporting test electrode.Stirrer is put into beaker, beaker is placed on the magnetic stirrer, make electrode immerse solution, turn on agitator is under middling speed stirs (do not spatter mistake, no bubble produces).Add the silver nitrate standard solution with potentiometric titrimeter and carry out potentiometric titration, the consumption of silver nitrate standard solution when record arrives titration end-point.
(4) do blank assay simultaneously with the distilled water of chloride not.
Chloride content is (with CL
-Meter) calculate:
CL
-％＝3.55(v
2c-v
1c)×500÷(v×s)
Wherein: CL
-%: chloride content in the sample, %;
3.55: convert and get in the molal weight of chlorine * 100 ÷, 1000 backs;
V: the filtrate volume of getting during mensuration, ml;
V
2: the titration sample consumes liquor argenti nitratis ophthalmicus volume, ml;
V
1: blank liquor argenti nitratis ophthalmicus volume, the ml of consuming of titration;
C: standard silver nitrate solution concentration, mol/L;
500: filtrate cumulative volume, ml;
S: example weight, g.
Adopt the inventive method also to can be used to chloride content in test absorbant slurries and the desulfurization slurry.
Be described further below in conjunction with embodiment, but not as a limitation of the invention.
Embodiment 1:
(1) get the gypsum samples of 10.2010g drying, add 300ml distilled water, after fully shaking up, filter with quantitative filter paper at a slow speed, and fully wash gypsum samples with distilled water, filtrate is collected constant volume in the 500ml volumetric flask;
(2) get 100ml (V) filtrate, place the 250ml beaker, add 10ml total ionic strength adjustment buffer degree and regulate buffer solution;
(3) connect potentiometric titrimeter and supporting test electrode.Stirrer is put into beaker, beaker is placed on the magnetic stirrer, make electrode immerse solution, turn on agitator is under middling speed stirs (do not spatter mistake, no bubble produces).Add 0.0140mol/L (C) silver nitrate standard solution with potentiometric titrimeter and carry out potentiometric titration, the consumption V of silver nitrate standard solution when record arrives titration end-point
2Be 15.10ml.
(4) be blank assay V simultaneously with the distilled water of chloride not
1Be 0ml.
Chloride content is (with CL
-Meter) result of calculation is:
CL
-％＝3.55×0.014×15.10×500÷(100×10.2010)＝0.37
Embodiment 2:
(1) get the gypsum samples of 14.0512g drying, add 300ml distilled water, after fully shaking up, filter with quantitative filter paper at a slow speed, and fully wash gypsum samples with distilled water, filtrate is collected constant volume in the 500ml volumetric flask;
(2) get 100ml (V) filtrate, place the 250ml beaker, add 15ml total ionic strength adjustment buffer degree and regulate buffer solution;
(3) connect potentiometric titrimeter and supporting test electrode.Stirrer is put into beaker, beaker is placed on the magnetic stirrer, make electrode immerse solution, turn on agitator is under middling speed stirs (do not spatter mistake, no bubble produces).Add 0.0140mol/L (C) silver nitrate standard solution with potentiometric titrimeter and carry out potentiometric titration, the consumption V of silver nitrate standard solution when record arrives titration end-point
2Be 10.26ml.
(4) be blank assay V simultaneously with the distilled water of chloride not
1Be 0ml.
Chloride content is (with CL
-Meter) result of calculation is:
CL
-％＝3.55×0.014×10.26×500÷(100×14.0512)＝0.18
Embodiment 3:
(1) get the gypsum samples of 19.9625g drying, add 300ml distilled water, after fully shaking up, filter with quantitative filter paper at a slow speed, and fully wash gypsum samples with distilled water, filtrate is collected constant volume in the 500ml volumetric flask;
(2) get 50ml (V) filtrate, place the 250ml beaker, add 12ml total ionic strength adjustment buffer degree and regulate buffer solution;
(3) connect potentiometric titrimeter and supporting test electrode.Stirrer is put into beaker, beaker is placed on the magnetic stirrer, make electrode immerse solution, turn on agitator is under middling speed stirs (do not spatter mistake, no bubble produces).Add 0.0140mol/L (C) silver nitrate standard solution with potentiometric titrimeter and carry out potentiometric titration, the consumption V of silver nitrate standard solution when record arrives titration end-point
2Be 5.05ml.
(4) be blank assay V simultaneously with the distilled water of chloride not
1Be 0ml.
Chloride content is (with CL
-Meter) result of calculation is:
CL
-％＝3.55×0.014×5.05×500÷(100×19.9625)＝0.063
Claims (1)
1, the method for testing of chloride content in a kind of flue gas desulphurization system is characterized in that regulating buffer solution by adding the total ionic strength adjustment buffer degree, and the antijamming capability when having increased the potentiometric titration test has improved reliability of testing result; The compound method that described total ionic strength adjustment buffer degree is regulated buffer solution is: take by weighing 100g potassium nitrate and place the 1000ml beaker, add 50ml acetic acid, add deionized water and be diluted to 500ml, adjusting pH with the sodium hydroxide solution of 40g/L is 5, is diluted to 1L with deionized water at last;
The step of the method for testing of described mensuration desulphurization system chloride content is:
(1) get the gypsum samples of 10-20g drying, add 300ml distilled water, after fully shaking up, filter with quantitative filter paper at a slow speed, and fully wash gypsum samples with distilled water, filtrate is collected constant volume in the 500ml volumetric flask;
(2) get 50-100ml filtrate, place the 250ml beaker, add 10-15ml total ionic strength adjustment buffer degree and regulate buffer solution;
(3) connect potentiometric titrimeter and supporting test electrode.Stirrer is put into beaker, beaker is placed on the magnetic stirrer, make electrode immerse solution, turn on agitator is under middling speed stirs (do not spatter mistake, no bubble produces).Add the silver nitrate standard solution with potentiometric titrimeter and carry out potentiometric titration, the consumption of silver nitrate standard solution when record arrives titration end-point;
(4) do blank assay simultaneously with the distilled water of chloride not,
Chloride content is (with CL
-Meter) calculate:
CL
-％＝3.55(v
2c-v
1c)×500÷(v×s)
Wherein: CL
-%: chloride content in the sample, %;
3.55: convert and get in the molal weight of chlorine * 100 ÷, 1000 backs;
V: the filtrate volume of getting during mensuration, ml;
V
2: sample consumes liquor argenti nitratis ophthalmicus volume, ml;
V
1: blank liquor argenti nitratis ophthalmicus volume, the ml of consuming;
C: standard silver nitrate solution concentration, mol/L;
500: filtrate cumulative volume, ml;
S: example weight, g.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100753611A CN101650337B (en) | 2009-09-11 | 2009-09-11 | Method for testing chloride content in smoke gas desulfurization system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100753611A CN101650337B (en) | 2009-09-11 | 2009-09-11 | Method for testing chloride content in smoke gas desulfurization system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101650337A true CN101650337A (en) | 2010-02-17 |
| CN101650337B CN101650337B (en) | 2012-05-30 |
Family
ID=41672618
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100753611A Active CN101650337B (en) | 2009-09-11 | 2009-09-11 | Method for testing chloride content in smoke gas desulfurization system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101650337B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103063726A (en) * | 2013-01-10 | 2013-04-24 | 广州天赐高新材料股份有限公司 | Detection method for chlorine ion content in lithium-ion battery electrolyte |
| CN109603502A (en) * | 2018-12-29 | 2019-04-12 | 浙江大学 | A kind of control system and method for flue gas dechlorination-desulfurization wastewater zero-emission |
| CN110927329A (en) * | 2019-12-16 | 2020-03-27 | 国网四川省电力公司电力科学研究院 | Atmospheric environment chloride ion deposition rate testing device and method |
| CN113671111A (en) * | 2021-08-26 | 2021-11-19 | 金能科技股份有限公司 | Method for quantitatively detecting chloride ions in potassium sorbate |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104483370A (en) * | 2014-12-19 | 2015-04-01 | 国家电网公司 | Method for testing concentration of water-soluble fluorine ion in flue gas desulfurization gypsum slurry |
-
2009
- 2009-09-11 CN CN2009100753611A patent/CN101650337B/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103063726A (en) * | 2013-01-10 | 2013-04-24 | 广州天赐高新材料股份有限公司 | Detection method for chlorine ion content in lithium-ion battery electrolyte |
| CN103063726B (en) * | 2013-01-10 | 2015-01-07 | 广州天赐高新材料股份有限公司 | Detection method for chlorine ion content in lithium-ion battery electrolyte |
| CN109603502A (en) * | 2018-12-29 | 2019-04-12 | 浙江大学 | A kind of control system and method for flue gas dechlorination-desulfurization wastewater zero-emission |
| CN110927329A (en) * | 2019-12-16 | 2020-03-27 | 国网四川省电力公司电力科学研究院 | Atmospheric environment chloride ion deposition rate testing device and method |
| CN113671111A (en) * | 2021-08-26 | 2021-11-19 | 金能科技股份有限公司 | Method for quantitatively detecting chloride ions in potassium sorbate |
| CN113671111B (en) * | 2021-08-26 | 2024-04-19 | 金能化学(齐河)有限公司 | Method for quantitatively detecting chloride ions in potassium sorbate |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101650337B (en) | 2012-05-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Oudot et al. | Precise shipboard determination of dissolved oxygen (Winkler procedure) for productivity studies with a commercial system 1 | |
| Liberti et al. | Anion determination with ion selective electrodes using Gran's plots. Application to fluoride | |
| CN105136894B (en) | The assay method of chloride ion content in copper electrolyte | |
| CN101650337B (en) | Method for testing chloride content in smoke gas desulfurization system | |
| CN101609049A (en) | The method of nickel and cobalt content in a kind of titrimetry test nickel compound | |
| Lomako et al. | Sulfate-selective electrode and its application for sulfate determination in aqueous solutions | |
| CN104483311A (en) | Indicator for simultaneous measurement of calcium, barium and magnesium in silicon-calcium-barium-magnesium by adopting EDTA titration method | |
| CN102183518A (en) | Method for quickly measuring sulfate radical content in magnesium method desulfurization process | |
| CN101825579A (en) | Method for measuring concentration of polyacrylamide solution | |
| CN107991429B (en) | Method for determining cyanide easily released in cyanide-containing wastewater containing sulfide | |
| CN103645274B (en) | Measure the method for chloride ion content in cold-rolling emulsion | |
| CN102879452A (en) | Method for determining content of micro chlorine ions in surface treatment solution | |
| RU2470289C1 (en) | Composition of membrane of ion-selective electrode for detection of lead ions | |
| CN103226126B (en) | Method for detecting sulfide in sewage | |
| Ganjali et al. | Subnanomolar determination of a beryllium ion by a novel Be (II) microsensor based on 4-nitrobenzo-9-crown-3-ether | |
| CN100458420C (en) | Method for measuring chlorion in lime slurry by nitric acid mercurimetry | |
| CN102901765B (en) | Potentiometric titration method for measuring content of Hg<2+> in solution | |
| CN113687016B (en) | Method for detecting chloride ion content in cyclobenzaprine hydrochloride | |
| CN102590317B (en) | PH composite electrode method for measuring content of nitrite ions in solution | |
| CN101576529A (en) | Determination of sliver using precision electric potential titration | |
| CN106404997A (en) | Method for determining content of calcium in calcium-silicon alloy by potentiometric titration | |
| CN109187848B (en) | Automatic titration method for alumina, caustic alkali and carbon alkali in sodium aluminate solution | |
| AU2017286802B2 (en) | A method for measuring the concentration of a chemical species using a reagent baseline | |
| CN109839474A (en) | The measuring method of fluorine content in a kind of fluorine-containing liquid during tantalum and niobium hydrometallurgy | |
| Aghaie et al. | Manganese (II) ion-selective membrane electrode based on N-(2-picolinamido ethyl)-Picolinamide as neutral carrier |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: STATE ELECTRIC NET CROP. HEBEI ELECTRIC POWER CONS Effective date: 20130106 Owner name: HEBEI ELECTRIC POWER CORPORATION ELECTRIC POWER RE Free format text: FORMER OWNER: HEBEI ELECTRIC POWER RESEARCH INSTITUTE Effective date: 20130106 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20130106 Address after: 050021 No. 238 South Sports street, Yuhua Road, Hebei, Shijiazhuang Patentee after: Electric Power Research Institute of Hebei Electric Power Corporation Patentee after: State Grid Corporation of China Patentee after: Hebei Electric Power Construction & Adjustment Research Institute Address before: 050021 No. 238 South Sports street, Hebei, Shijiazhuang Patentee before: Hebei Electric Power Research Institute |