CN109374821B - Method for measuring zirconium content in rutile - Google Patents
Method for measuring zirconium content in rutile Download PDFInfo
- Publication number
- CN109374821B CN109374821B CN201811229374.5A CN201811229374A CN109374821B CN 109374821 B CN109374821 B CN 109374821B CN 201811229374 A CN201811229374 A CN 201811229374A CN 109374821 B CN109374821 B CN 109374821B
- Authority
- CN
- China
- Prior art keywords
- rutile
- solution
- sample
- zirconium
- zirconium content
- 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.)
- Active
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
The invention belongs to the technical field of analytical chemistry, and particularly relates to a method for measuring the content of zirconium in rutile. Aiming at the problems that the existing methods for measuring the zirconium content in a rutile sample are all instrument methods, the upper limit of the measurement is less than 3 percent, and the method is not suitable for measuring the high-content zirconium in the titanium dioxide, the invention provides a method for measuring the zirconium content in rutile, which comprises the following steps: a. adding sodium peroxide and ferric oxide, and adding rutile sample for melting; b. soaking the molten sample in water, and boiling; c. adding hydrochloric acid; d. adding stannous chloride until the solution turns colorless from yellow, adding a xylenol orange indicator, and titrating with an EDTA standard solution; e. the zirconium content of the rutile was calculated. The determination method can ensure complete dissolution of the titanium dioxide sample, and has accurate determination result, high precision and accuracy; meanwhile, the method is a classical analysis method, can be used for measuring samples with the zirconium content of 20%, and is wide in application range.
Description
Technical Field
The invention belongs to the technical field of analytical chemistry, and particularly relates to a method for measuring the content of zirconium in rutile.
Background
Rutile is one of a plurality of seashore placers, and as rutile has wide application in industrial production and daily life, people have increasingly large demand on rutile and higher requirements on the quality of rutile, and in the inspection of rutile finished products, the inspection of main elements of titanium dioxide and the detection of impurity elements such as iron, zirconium, silicon and the like are also indispensable. For the determination of zirconium element in rutile, many studies have been made in China, and representative examples are "content of zirconium dioxide, ferric oxide and silicon dioxide in rutile determined by ICP-AES published in spectral laboratories of wutianliang," spectral analysis of zirconia in river sand ore and rutile "published by chengtijie," determination of zirconium in rutile by ICP-AES published in populus academic, "determination of zirconium in rutile and in ilmenite by ICP-AES published in lisun," and "determination of zirconium in rutile by ICP-AES method published in well-living matters" are typical. Wherein, the ICP-AES is adopted to measure the contents of zirconium dioxide, ferric oxide and silicon dioxide in rutile, the ICP-AES is adopted to measure the zirconium in rutile and the ilmenite, and the ICP-AES is adopted to measure the zirconium in rutile; spectral analysis of zirconia in river sand ore and rutile the content of zirconium in rutile was determined by means of a direct current arc. The method adopts an instrument method to measure the zirconium content in rutile, the upper limit of the measurement is less than 3%, and the method is not suitable for measuring the high-content zirconium in the titanium dioxide.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the existing methods for measuring the zirconium content in the rutile sample are all instrument methods, the upper limit of the measurement is less than 3%, and the method is not suitable for measuring the high-content zirconium in the titanium dioxide.
The technical scheme for solving the technical problems comprises the following steps: provides a method for measuring the zirconium content in rutile. The method comprises the following steps:
a. adding sodium peroxide and ferric oxide into a crucible, adding a rutile sample, and melting at 700-800 ℃;
b. b, soaking the sample melted in the step a with water, and boiling for 1-5 min;
c. adding hydrochloric acid into the solution obtained in the step b, wherein the addition amount is based on the concentration of the hydrochloric acid in the solution being 1.1-1.3 mol/L;
d. adding stannous chloride into the sample solution obtained in the step c until the solution is colorless from yellow, adding a xylenol orange indicator, titrating with an EDTA standard solution until the sample solution is yellow, and recording the use amount V of the EDTA standard solution; performing blank test according to the steps, titrating blank test solution, and recording the volume of EDTA standard titration solution as V0；
e. Calculating the zirconium content in rutile; formula for calculationComprises the following steps:
in the formula:
c, the quantity concentration of EDTA standard titration solution substances is in mol/L;
v is the volume of EDTA standard titration solution of the titration sample solution, and the unit is mL;
V0titrating the volume of a blank test solution EDTA standard titration solution, wherein the unit is mL;
m is the sample amount in g;
91.22-zirconium in g/mol units.
In the method for measuring the zirconium content in rutile, the addition amounts of the sodium peroxide, the ferric oxide and the rutile sample in the step a are as follows: 2g to 3g of sodium peroxide and 0.1g to 0.2g of ferric oxide are added into each 0.25g to 0.5g of rutile sample.
In the method for measuring the content of zirconium in rutile, the melting time in the step a is 15-25 min.
In the method for measuring the content of zirconium in rutile, the melting in the step a is specifically performed by the following steps: firstly melting at 700-750 ℃ for 5-10 min, and heating to 790-810 ℃ for melting for 10-15 min.
In the method for measuring the content of zirconium in rutile, the volume of the solution obtained in the step c is 150-200 mL.
In the method for determining the zirconium content in the rutile, the stannous chloride in the step d is analytically pure, and the concentration is 40-60 g/L.
In the method for measuring the zirconium content in the rutile, the indicator xylenol orange in the step d is analytically pure, and the concentration is 1.5-2.5 g/L.
In the method for measuring the zirconium content in rutile, the concentration of the EDTA standard solution in the step d is 0.01-0.02 mol/L.
In the method for measuring the content of zirconium in rutile, the temperature during dripping in the step d is 60-70 ℃.
The invention has the beneficial effects that: the invention provides a method for measuring the zirconium content in rutile, which belongs to one of classical analysis methods, and can ensure complete dissolution of a titanium dioxide sample by melting the sample under a specific condition. The method of the invention fills the blank of the rutile zirconium content analysis method in the classical analysis method, solves the problem of measuring high-content zirconium in rutile, and can measure the sample with the zirconium content reaching 20 percent. The method has the advantages of simple operation, accurate and reliable measurement result, good practicability and suitability for popularization and application.
Detailed Description
The invention provides a method for measuring the zirconium content in rutile, which comprises the following steps:
a. adding 0.1-0.2 g of ferric oxide powder into a corundum crucible which is pre-added with 2g of sodium peroxide, weighing 0.25-0.5 g of sample in the corundum crucible, covering the surface with a small amount of sodium peroxide, melting for 5min at 700-750 ℃, heating to 800 ℃, melting for 10min, and cooling;
b. placing the crucible in a 400mL beaker, soaking the crucible with water, washing the crucible out, and boiling the solution for 1-5 min in a slightly boiling state;
c. dissolving the precipitate with hydrochloric acid, adjusting the acidity of the solution to 1.1-1.3 mol/L, and keeping the volume of the solution at 150-200 mL;
d. heating and boiling, cooling slightly, adding stannous chloride reduction solution to be colorless, adding 4 drops of xylenol orange indicator, titrating by using EDTA standard solution at the temperature of 60-70 ℃ until the sample solution is yellow, and recording the use amount V of the EDTA standard solution; performing blank test according to the steps, titrating blank test solution, and recording the volume of EDTA standard titration solution as V0；
e. Calculating the zirconium content in rutile; the calculation formula is as follows:
in the formula:
c, the quantity concentration of EDTA standard titration solution substances is in mol/L;
v is the volume of EDTA standard titration solution of the titration sample solution, and the unit is mL;
V0titrating the volume of a blank test solution EDTA standard titration solution, wherein the unit is mL;
m is the sample amount in g;
91.22-zirconium in g/mol units.
Wherein, in order to improve the accuracy of the determination method and facilitate the weighing of the sample, the sample taken in the step a is preferably 0.25g to 0.5 g. 2-3 g of sodium peroxide and 0.1-0.2 g of ferric oxide are added into each 0.25-0.5 g of rutile sample. The sodium peroxide is used for melting a sample, and the ferric oxide powder can ensure that the titanium dioxide sample is completely dissolved, inhibit titanium hydrolysis in the subsequent titration process and eliminate the influence of titanium, so that the determination result is more accurate.
In the method for determining the zirconium content in the rutile, the stannous chloride in the step d is analytically pure, and the concentration is 40-60 g/L. After stannous chloride is added, the solution can be changed from yellow to colorless, the color change is sharp, and the observation is convenient.
In the method for measuring the zirconium content in the rutile, the indicator xylenol orange in the step d is analytically pure, and the concentration is 1.5-2.5 g/L. In order to ensure good indicating effect, the indicator is preferably prepared at present, and the adding amount is 2-4 drops.
In the method for measuring the zirconium content in rutile, the concentration of the EDTA standard solution in the step d is 0.01-0.02 mol/L.
In the method for measuring the content of zirconium in rutile, in order to make the reaction between zirconium and EDTA sensitive and the measurement result more accurate, the temperature during the step d is 60-70 ℃.
The key point of the determination method is that sodium peroxide and ferric oxide are added in the melting stage to be melted together, the sodium peroxide is used for melting a sample, and ferric oxide powder can ensure that a titanium dioxide sample is completely dissolved, inhibit titanium hydrolysis in the subsequent titration process and eliminate the influence of titanium, so that the determination result is more accurate. Meanwhile, stannous chloride is added to eliminate iron interference, the titration acidity of the solution is controlled, the concentration of hydrochloric acid in the solution is 1.1-1.3 mol/L, titration is carried out at the temperature of 60-70 ℃, the processes are matched together to form an integral technical scheme, so that the measuring result is more accurate, and the pioneer of measuring the zirconium content in rutile by adopting a classical analysis method is also created.
The following examples are intended to illustrate specific embodiments of the present invention without limiting the scope of the invention to the examples.
Example 1 determination of the zirconium content of rutile by the method of the invention
Taking 5 corundum crucibles, adding 2g of sodium peroxide into each corundum crucible, adding 0.2g of ferric oxide powder into each corundum crucible, respectively weighing five parts of 0.5g of sample, adding the five parts of sample into each corundum crucible, covering the surface with a small amount of sodium peroxide, melting for 5min at 750 ℃, heating to 800 ℃, melting for 10min, and cooling. Placing the crucible in a 400mL beaker, leaching with warm water, washing out the crucible, placing the solution on a low-temperature electric furnace tray, boiling for 5min under a slightly boiling state, adding 30mL of hydrochloric acid (1+1) to dissolve the precipitate, transferring the solution into a 500mL conical flask, and supplementing the volume of the solution to about 200 mL. Heating and boiling, cooling slightly, adding stannous chloride reduction solution to be colorless, adding 4 drops of xylenol orange indicator, cooling the titration solution to 60-70 ℃, and taking Ethylene Diamine Tetraacetic Acid (EDTA) standard titration solution to be yellow as a terminal point. Blank test was performed along with the sample. Calculating the zirconium content in rutile; the calculation formula is as follows: .
In the formula:
c, the quantity concentration of EDTA standard titration solution substances is in mol/L;
v is the volume of EDTA standard titration solution of the titration sample solution, and the unit is mL;
V0titrating the volume of a blank test solution EDTA standard titration solution, wherein the unit is mL;
m is the sample amount in g;
91.22-zirconium in g/mol units.
The zirconium content of the example 1 samples is shown in table 1 below.
TABLE 1 measurement results of zirconium content
The sample of example 1, with RSD (n-5) < 3%, demonstrates the high precision of the method of the present invention.
Example 2 determination of the zirconium content of rutile by the method of the invention
Taking 4 corundum crucibles, adding 2g of sodium peroxide into each corundum crucible, adding 0.1g of ferric oxide powder into each corundum crucible, weighing 4 parts of 0.25g of sample, respectively filling the sample into the corundum crucibles, adding a small amount of sodium peroxide to cover the surface of the corundum crucibles, melting the corundum crucibles at 700 ℃ for 5min, heating the corundum crucibles to 800 ℃ for melting for 10min, and cooling. Placing the crucible in a 400mL beaker, leaching with warm water, washing out the crucible, respectively adding 0.00mL, 5.00mL, 10.00mL and 15.00mL of zirconium standard solution (the concentration of the zirconium standard solution is 1.00mg/mL) into the beaker, placing the solution on a low-temperature electric furnace tray, boiling for 5min under a slightly boiling state, adding 30mL of hydrochloric acid (1+1) to dissolve and precipitate, transferring the solution into a 500mL conical flask, and supplementing the volume of the solution to about 200 mL. Heating and boiling, cooling slightly, adding stannous chloride reduction solution to be colorless, adding 4 drops of xylenol orange indicator, cooling the titration solution to 60-70 ℃, and taking Ethylene Diamine Tetraacetic Acid (EDTA) standard titration solution to be yellow as a terminal point. Blank test was performed along with the sample. Calculating the zirconium content in rutile; the calculation formula is as follows: .
In the formula:
c, the quantity concentration of EDTA standard titration solution substances is in mol/L;
v is the volume of EDTA standard titration solution of the titration sample solution, and the unit is mL;
V0titrating the volume of a blank test solution EDTA standard titration solution, wherein the unit is mL;
m is the sample amount in g;
91.22-zirconium in g/mol units.
The zirconium content measured in example 2 is shown in table 2 below.
TABLE 2 experiment of recovery of zirconium
| Amount of zirconium added, mg | 0.0 | 5.00 | 10.00 | 15.00 |
| The amount of zirconium, mg, was measured | 3.85 | 8.96 | 13.65 | 18.65 |
| Amount of recovered zirconium, mg | / | 5.11 | 9.80 | 11.8 |
| Percent recovery rate% | / | 102.2 | 98.0 | 98.67 |
In the sample of the embodiment 2, the recovery rate is 98-103%, and the method provided by the invention is proved to have high accuracy.
Comparative example 3 determination of zirconium content in rutile by Prior Art
Taking 4 corundum crucibles, adding 2.5g of sodium peroxide into each corundum crucible, adding 0.2g of ferric oxide powder into each corundum crucible, respectively weighing 0.5g of 4 rutile samples with different tastes into the corresponding corundum crucibles, covering the surfaces with a small amount of sodium peroxide, melting for 5min at 750 ℃, heating to 800 ℃, melting for 10min, and cooling. Placing the crucible in a 400mL beaker, leaching with warm water, washing out the crucible, placing the solution on a low-temperature electric furnace tray, boiling for 5min under a slightly boiling state, adding 30mL of hydrochloric acid (1+1) to dissolve the precipitate, transferring the solution into a 500mL conical flask, and supplementing the volume of the solution to about 200 mL. Heating and boiling, cooling slightly, adding stannous chloride reduction solution to be colorless, adding 3 drops of xylenol orange indicator, cooling the titration solution to 60-70 ℃, and taking Ethylene Diamine Tetraacetic Acid (EDTA) standard titration solution to be yellow as a terminal point. Blank test was performed along with the sample. Calculating the zirconium content in rutile; the calculation formula is as follows:
in the formula:
c, the quantity concentration of EDTA standard titration solution substances is in mol/L;
v is the volume of EDTA standard titration solution of the titration sample solution, and the unit is mL;
v0-volume of standard titration solution of blank test solution EDTA, unit is mL;
m is the sample amount in g;
91.22-zirconium in g/mol units.
Comparative example 3 the measured zirconium contents are shown in table 3 below.
TABLE 3 determination of zirconium in rutile
| 1# | 2# | 3# | 4# | |
| ICP-AES | 0.550 | 0.776 | 0.920 | 1.25 |
| The method of the invention | 0.532 | 0.755 | 0.948 | 1.28 |
According to the embodiment and the comparative example, the method for determining the zirconium content in the titanium dioxide by adopting the classical analysis method is high in accuracy, good in precision, simple to operate and wide in popularization and application prospect.
Claims (6)
1. The method for measuring the zirconium content in rutile is characterized by comprising the following steps of:
a. adding sodium peroxide and ferric oxide into a crucible, adding a rutile sample, and melting at 700-800 ℃; the adding amount of the sodium peroxide, the ferric oxide and the rutile sample is as follows: 2-3 g of sodium peroxide and 0.1-0.2 g of ferric oxide are added into each 0.25-0.5 g of rutile sample; the melting time is 15-25 min; the melting operation is as follows: firstly, melting at 700-750 ℃ for 5-10 min, and heating to 790-810 ℃ for melting for 10-15 min;
b. b, soaking the sample melted in the step a with water, and boiling for 1-5 min;
c. adding hydrochloric acid into the solution obtained in the step b, wherein the addition amount is based on the concentration of the hydrochloric acid in the solution being 1.1-1.3 mol/L;
d. adding stannous chloride into the sample solution obtained in the step c until the solution is colorless from yellow, adding a xylenol orange indicator, titrating with an EDTA standard solution until the sample solution is yellow, and recording the use amount V of the EDTA standard solution; performing blank test according to the steps, titrating blank test solution, and recording the volume of EDTA standard titration solution as V0；
e. Calculating the zirconium content in rutile; the calculation formula is as follows:
in the formula:
c, the quantity concentration of EDTA standard titration solution substances is in mol/L;
v is the volume of EDTA standard titration solution of the titration sample solution, and the unit is mL;
V0titrating the volume of a blank test solution EDTA standard titration solution, wherein the unit is mL;
m is the sample amount in g;
91.22-zirconium in g/mol units.
2. The method of determining zirconium content in rutile of claim 1, wherein: and c, the volume of the solution obtained in the step c is 150-200 mL.
3. The method of determining zirconium content in rutile of claim 1, wherein: and d, analyzing the stannous chloride with the purity of 40-60 g/L.
4. The method of determining zirconium content in rutile of claim 1, wherein: and d, analytically pure indicator xylenol orange with the concentration of 1.5-2.5 g/L.
5. The method of determining zirconium content in rutile of claim 1, wherein: and d, the concentration of the EDTA standard solution in the step d is 0.01-0.02 mol/L.
6. The method of determining zirconium content in rutile of claim 1, wherein: and d, the temperature of the dripping time in the step d is 60-70 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811229374.5A CN109374821B (en) | 2018-10-22 | 2018-10-22 | Method for measuring zirconium content in rutile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811229374.5A CN109374821B (en) | 2018-10-22 | 2018-10-22 | Method for measuring zirconium content in rutile |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109374821A CN109374821A (en) | 2019-02-22 |
| CN109374821B true CN109374821B (en) | 2021-07-09 |
Family
ID=65400767
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811229374.5A Active CN109374821B (en) | 2018-10-22 | 2018-10-22 | Method for measuring zirconium content in rutile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109374821B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110346507A (en) * | 2019-07-15 | 2019-10-18 | 西宁特殊钢股份有限公司 | The measuring method of zirconium dioxide in a kind of stuffing sand |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103852481A (en) * | 2014-03-12 | 2014-06-11 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for detecting components of elements in coated titanium dioxide |
| CN104928720A (en) * | 2015-07-13 | 2015-09-23 | 攀钢集团攀枝花钢铁研究院有限公司 | Electrolyzing method for titanium soluble anode |
| CN105890967A (en) * | 2016-04-05 | 2016-08-24 | 中国地质科学院矿产综合利用研究所 | Determination method for detecting titanium element in titanium slag by microwave alkali fusion-titration method |
-
2018
- 2018-10-22 CN CN201811229374.5A patent/CN109374821B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103852481A (en) * | 2014-03-12 | 2014-06-11 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for detecting components of elements in coated titanium dioxide |
| CN104928720A (en) * | 2015-07-13 | 2015-09-23 | 攀钢集团攀枝花钢铁研究院有限公司 | Electrolyzing method for titanium soluble anode |
| CN105890967A (en) * | 2016-04-05 | 2016-08-24 | 中国地质科学院矿产综合利用研究所 | Determination method for detecting titanium element in titanium slag by microwave alkali fusion-titration method |
Non-Patent Citations (4)
| Title |
|---|
| "ICP-AES 法测定金红石及钛铁矿中锆";李蓉 等;《云南冶金》;20131031;第42卷(第5期);第99页1.2节，第100页2.4节 * |
| "锆英粉中二氧化锆测定方法的探讨";贺桂荣 等;《理化检验-化学分册》;20011130;第37卷(第11期);第518页1.2节 * |
| ICP-AES测定金红石中的二氧化锆、三氧化二铁、二氧化硅含量";吴天良 等;《光谱实验室》;20100731;第27卷(第4期);第1295页2.2节 * |
| 锆英粉中ZrO_2、SiO_2、Fe_2O_3、TiO_2、P_2O_5的快速;杨燕文，邓玉红;《广西机械》;19940930(第03期);第45页第1段 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109374821A (en) | 2019-02-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106053366B (en) | Lead, plant Zn content method in a kind of lead concentrate of efficiently and accurately, Gold Concentrate under Normal Pressure | |
| CN106198854B (en) | A kind of Direct spectrophotometry method in billon | |
| CN101435775B (en) | Method for measuring impurity elements arsenic, tin antimony in ferromolybdenum | |
| CN102243177B (en) | Method for determining silicon dioxide in silicon carbide | |
| CN104237209A (en) | Method for synchronously detecting copper, bismuth, iron, lead, tellurium, selenium, antimony and palladium in electrolytic silver through ICP-AES (Inductively Coupled Plasma-Atomic Emission Spectrometry) | |
| CN109374821B (en) | Method for measuring zirconium content in rutile | |
| CN102331385A (en) | Method for determining tungsten content in impure tungsten product | |
| CN106645122A (en) | Determination method of content of zirconium in uranium-zirconium alloy | |
| CN108776130A (en) | It is a kind of quickly to measure Theil indices method in W, mo, bi And Sn polymetallic ore | |
| CN102393371B (en) | Sample processing method for detecting boron in industrial silicon with graphite furnace atomic absorption spectrometry | |
| CN103115921A (en) | Method for measuring content of silicon dioxide in iron ores | |
| CN108613937B (en) | Method for measuring thiocyanate in cyanogen slag | |
| CN104215634A (en) | Method for determining content of tin in tungsten concentrate | |
| CN108303389A (en) | The assay method of copper content in a kind of high lead Gold Concentrate under Normal Pressure | |
| CN110749486B (en) | Method for measuring tin content in crude lead | |
| CN105466910B (en) | Strengthen the measuring method of zirconium and zirconia content in disperse platinum | |
| CN104133036B (en) | The analysis determining method of alundum (Al2O3) in a kind of bauxite | |
| CN109283287A (en) | The measuring method of antimony content in a kind of electrolytic antimony | |
| CN104407095A (en) | Method for measuring magnesium ion in sulfate-process titanium dioxide concentrated solution | |
| CN104215541A (en) | Method for high efficiently and precisely measuring contents of high purity alumina and impurities | |
| CN103091155B (en) | Method for dissolving high purity zirconia | |
| CN105424869B (en) | A kind of method for determining content of aluminium powder in titanium tetrachloride suspension | |
| CN113418970A (en) | Method for measuring fluorine in magnesium refractory material | |
| CN101629910A (en) | Method for detecting diboron trioxide content in camsellite | |
| CN112763439A (en) | Method for determining boron element in refining slag of gear steel |
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 | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 610306 Chengdu City, Chengdu, Sichuan, China (Sichuan) free trade test zone, Chengdu City, Qingbaijiang District, xiangdao Boulevard, Chengxiang Town, No. 1509 (room 13, A District, railway port mansion), room 1319 Patentee after: Chengdu advanced metal material industry technology Research Institute Co.,Ltd. Address before: 610306 Chengdu City, Chengdu, Sichuan, China (Sichuan) free trade test zone, Chengdu City, Qingbaijiang District, xiangdao Boulevard, Chengxiang Town, No. 1509 (room 13, A District, railway port mansion), room 1319 Patentee before: CHENGDU ADVANCED METAL MATERIAL INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE Co.,Ltd. |