CN108918754A - Aluminum content tests method in aluminium lithium alloy - Google Patents
Aluminum content tests method in aluminium lithium alloy Download PDFInfo
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Abstract
The invention discloses a kind of aluminum content tests methods in aluminium lithium alloy, including step：S1, sour molten, acquisition alloy acid solution is carried out after soaking on the surface of aluminium lithium alloy with water；S2, alloy acid solution is transferred to volume for V1Volumetric flask in and constant volume, obtain sample；S3, aliquot is accurately pipetted as titration stoste, excessive EDTA standard solution is added after its pH is adjusted to 2~3, then adjusting its pH is 6~8, obtains titrating solution；S4, NH is added into titrating solution4Cl‑NH3·H2O buffer solution and chromium black T indicator are titrated to solution using the quasi- solution of zno-based and sport pure blue by blue-green, record the dosage V of the quasi- solution of zno-based；S5, the content that aluminium in aluminium lithium alloy is calculated according to formula 1.Measuring method of the invention quick and precisely, easy to operate and End point indication it is obvious, and it is not necessarily to enough buy expensive instrument and equipment, and analysis cost is cheap.
Description
Technical field
The invention belongs to alloy component analysis technical fields, in particular, being related to a kind of survey of aluminium content in aluminium lithium alloy
Determine method.
Background technique
Aluminium lithium alloy is a kind of light alloy of low-density, has high elastic modulus, high specific stiffness and high specific strength etc. are special
Point.Studies have shown that every lithium for adding 1% (wt%) in aluminium alloy, can make alloy density reduce by 3%, and elasticity modulus improves
6%, and can guarantee that alloy works well in quenching and artificial aging after-hardening.Especially to quality " worrying about petty gain or loss " space flight,
Aviation field, aluminium lithium alloy become the important feature material of aerospace flight vehicle of new generation with its excellent performance.
The chemical property of lithium is very active, is melted when practicing aluminium lithium alloy in the form of pure metal lithium, easy scaling loss and inconvenient,
Therefore lithium is added mostly in the form of aluminium lithium intermediate alloy.When preparing aluminium lithium intermediate alloy with fused salt electrolysis process, quick and precisely analyze
Alloying component is to be electrolysed the basic demand of intermediate control analysis.Accurate analysis alloying component is Casting Al-Li Alloy production essence simultaneously
The premise really added is of great significance to the Foundry Production of aluminium lithium alloy.
In capacity analysis, because slow with EDTA complexing speed, facile hydrolysis cannot be needed aluminium ion by direct titration
In the presence of excessive EDTA, boiling could be complexed completely；Meanwhile in acid condition, Al3+Have to common indicator xylenol orange
Sealing process keeps terminal unobvious.In aluminium lithium intermediate alloy the measurement of aluminium composition can also using atomic absorption spectrography (AAS),
The methods of atomic emission spectrometry and induced coupled plasma atomic emission spectrometry are measured, but these measuring methods are both needed to purchase valuableness
Instrument and equipment.Currently, spectral class method measurement metal ion content has many places report, such as 201510316702 disclosure of CN
A kind of method with micro aluminium composition in ICP measurement black liquid, concentrated nitric acid and mistake are added first in black liquid
Hydrogen peroxide solution carries out resolution processing until obtaining transparent digestion solution, aluminum ions in transparent digestion solution contain is measured with ICP
Amount, and micro aluminium composition in black liquid is calculated；But there are certain defects for the above method, because spectroscopic methodology is suitable for micro-
Amount analysis, when being used for macro-analysis, error is larger, and these measuring methods are both needed to the expensive instrument and equipment of purchase.
Summary of the invention
To solve the above-mentioned problems of the prior art, the present invention provides aluminum content tests sides in a kind of aluminium lithium alloy
Method, the measuring method quick and precisely, easy to operate and End point indication it is obvious.
In order to achieve the above object of the invention, present invention employs the following technical solutions：
A kind of aluminum content tests method in aluminium lithium alloy, including step：
S1, sour molten, acquisition alloy acid solution is carried out after soaking on the surface for the aluminium lithium alloy that quality is m with water；
S2, the alloy acid solution is transferred to volume for V1Volumetric flask in and constant volume, obtain sample；
S3, volume is pipetted accurately as V2The sample as titration stoste, the pH of the titration stoste is adjusted to 2~
3, and it is V that volume is added thereto0EDTA standard solution, then adjust its pH be 6~8, obtain the first titrating solution；Wherein, V0's
Volumetric usage of the additive amount not less than the corresponding EDTA standard solution of metallic aluminium that quality is m；
S4, NH is added into first titrating solution4Cl-NH3·H2O buffer solution and chromium black T indicator, using zno-based
Quasi- solution is titrated to solution and sports pure blue by blue-green, records the dosage V of the quasi- solution of the zno-based；
S5, the content that aluminium in the aluminium lithium alloy is calculated according to formula 1,
In formula 1, w (Al) indicates the mass percent of aluminium in aluminium lithium alloy；
C indicates the concentration of the EDTA standard solution, unit mol/L；
M indicates the relative atomic mass of aluminium, unit g/mol；
The volume multiple of the f expression comparable EDTA standard solution of the quasi- solution of 1mL zno-based；
V1、V2、V0, V unit be mL；The unit of m is g.
Further, the preparation method of the quasi- solution of the zno-based is：
ZnO is heat-treated to constant weight；
It accurately weighs the ZnO through Overheating Treatment and carries out sour molten, acquisition Zn acid solution；Wherein, the dosage of the ZnO is accurate
To 0.0001g；
By Zn acid solution dilution and constant volume, the quasi- solution of the zno-based is obtained.
Further, the acid solution of the molten ZnO of acid is concentrated hydrochloric acid.
Further, the determination method of c and f is：
Accurately weighing volume is V3The quasi- solution of the zno-based as the second titrating solution；
NH is added into second titrating solution4Cl-NH3·H2O buffer solution and chromium black T indicator, using the EDTA
Standard solution is titrated to solution and sports Celeste by claret, records the dosage V of the EDTA standard solution4；
It is comparable to calculate the quasi- solution of 1mL zno-based by formula 3 for the concentration c that the EDTA standard solution is calculated by formula 2
The volume multiple f of EDTA standard solution,
In formula 2, c (ZnO) indicates the concentration of the quasi- solution of zno-based, unit mol/L；
V3、V4Unit be mL.
Further, in the step S3, it is V that volume, which is added,0EDTA standard solution after, boil solution keep 3min
After~5min, then adjusting its pH is 6~8.
Further, in the step S1, use volume ratio for 1:1 HNO3Solution or 1:The 1 molten institute of HCl solution acid
State aluminium lithium alloy.
Further, in the step S2, first the alloy acid solution heating stirring is retransferred after cooling to boiling
To in the volumetric flask.
Further, in the step S2, V1For 100.00mL；In the step S3, V2For 5.00mL；Described
In step S4, the NH4Cl-NH3·H2The additive amount of O buffer solution is 10mL, and the additive amount of the chromium black T indicator is 10
Drop.
Further, in the step S1, the value range of m is 0.4g~0.6g.
The present invention makes part EDTA by the EDTA standard solution of the excessive addition into the solution of aluminium lithium alloy to be titrated
Al is complexed3+, back titration is then carried out by the quasi- solution of zno-based and (Al is not complexed in titration titrating solution3+EDTA), thus logical
It crosses minusing and calculates the Al obtained in titrating solution3+Content.The measuring method quick and precisely, with chromium black T indicator indicates to drip
Determine process, indicator discoloration is sharp, and titration end-point is obvious, easily recognizable；Meanwhile the titration method effectively prevents being directly based upon
Complexometry titrates Al3+When the drawbacks such as existing terminal is unobvious.In addition, the measuring method only relies upon conventional chemical analysis
Equipment (i.e. titration device) is not based on instrument analysis and carries out, and without expensive instrument and equipment is enough bought, analysis cost is cheap.
Specific embodiment
Hereinafter, detailed description of the present invention embodiment in future.However, it is possible to implement this hair in many different forms
It is bright, and the present invention should not be construed as limited to the specific embodiment illustrated here.On the contrary, provide these embodiments be for
Explanation the principle of the present invention and its practical application, to make others skilled in the art it will be appreciated that of the invention is various
Embodiment and the various modifications for being suitable for specific intended application.
Term " first ", " second " etc. herein can be used to describe various substances although will be appreciated that, these
Substance should not be limited by these terms.These terms are only used to distinguish a substance with another substance.
The present invention provides a kind of aluminum content tests method in aluminium lithium alloy, which is based on NH4Cl-NH3·
H2O buffer solution provides alkaline environment and measures aluminium content with the excessive EDTA standard solution of the quasi- solution back titration of zno-based
's.The measuring method includes the following steps：
In step sl, it is molten that acid is carried out after the surface for the aluminium lithium alloy that quality is m being soaked with water, and it is molten to obtain alloy acid
Liquid.
Specifically, the aluminium lithium alloy progress acid that can weigh 0.4g~0.6g is molten, such as weighs 0.5g.
Further, it is 1 that volume ratio, which can be used,:1 HNO3Solution or 1:1 molten aluminium lithium alloy of HCl solution acid.
It should be noted that being to prevent with the purpose that a small amount of water soaks in advance before aluminium lithium alloy progress acid is molten
The direct acid adding of dry aluminium lithium alloy carries out sour molten and reacts violent.
In step s 2, alloy acid solution is transferred to volume is V1Volumetric flask in and constant volume, obtain sample.
Preferably, before the alloy acid solution of the molten acquisition of acid is transferred to volumetric flask, can leading heating stirring to pico-
Boiling transfers in volumetric flask after its cooling；In general, it in order to not influence the accuracy of volumetric flask, is cooled to
The temperature of room temperature can.
In step s3, accurately pipetting volume is V2Sample as titration stoste, the pH for titrating stoste is adjusted to 2~
3, and it is V that volume is added thereto0EDTA standard solution, then adjust its pH be 6~8, obtain the first titrating solution.
Specifically, the additive amount V of general control EDTA standard solution0It is the corresponding institute of metallic aluminium of m not less than quality
State the volumetric usage of EDTA standard solution, that is to say, that, it is assumed that there is no a lithium in the aluminium lithium alloy that quality is m, but metallic aluminium, it will
It uses same method to obtain titration stoste, then needing corresponding consumption volume is V0' EDTA standard solution, then control V0≥
V0'；In this way, the content based on aluminium in the aluminium lithium alloy that quality in the present invention is m is less than m, that is, it ensure that EDTA standard is molten
Liquid phase is for Al to be complexed in the titration stoste3+In excessive state, to guarantee that excessive EDTA can be straight by subsequent titration
It connects and measures and subtractive obtains Al3+Content.That is, guarantee that the EDTA standard solution added herein is in excessive state, thus
The measuring method is set to carry out being the applicable precondition of this measuring method based on back titration method.
It preferably, is V when volume is added0EDTA standard solution after, boil after the solution keeps 3min~5min, then adjust
Saving its pH is 6~8；In this way, Al can be based on3+Characteristic (Al when being complexed with EDTA3+Slow, the facile hydrolysis with EDTA complexing speed
Cannot be needed in the presence of excessive EDTA by direct titration, boiling could be complexed completely), to make Al3+Network between EDTA
It closes more stable, more complete.
In step s 4, NH is added into the first titrating solution4Cl-NH3·H2O buffer solution and chromium black T indicator use
The quasi- solution of zno-based is titrated to solution and sports pure blue by blue-green, records the dosage V of the quasi- solution of zno-based.
Specifically, the quasi- solution of zno-based can be used following methods and be prepared：(1) ZnO is heat-treated to constant weight；(2) quasi-
It really weighs and (is accurate to 0.0001g) ZnO through Overheating Treatment and carry out sour molten, acquisition Zn acid solution；(3) Zn acid solution is diluted
And constant volume, obtain the quasi- solution of zno-based.
It should be noted that generally ZnO powder can be roasted by Equipments for Heating Processing such as Muffle furnaces, sufficiently to remove wherein water
Point and other solid impurities etc., and every roasting several hours, stand to it and be cooled to room-temperature, weigh its content, lay equal stress on
The multiple roasting-cooling-weighing operation has thought the ZnO until the weighing difference of front and back twice is no more than ± 0.0004g
It is heat-treated to constant weight.
Further, it is preferable to using concentrated hydrochloric acid come sour molten ZnO through Overheating Treatment, in this way, ZnO can be made to be converted into
ZnCl2Solution, to reduce the influence of different kinds of ions as far as possible in subsequent titration process.
Preferably, in above-mentioned steps S2~step S4, V1For 100.00mL, V2For 5.00mL；NH4Cl-NH3·H2O is slow
The additive amount for rushing solution is 10mL, and the additive amount of chromium black T indicator is 10 drops.
In step s 5, the content of aluminium in aluminium lithium alloy is calculated according to formula 1,
In formula 1, w (Al) indicates the mass percent of aluminium in aluminium lithium alloy；C indicates the concentration of EDTA standard solution, single
Position is mol/L；M indicates the relative atomic mass of aluminium, unit g/mol；F indicates the comparable EDTA mark of the quasi- solution of 1mL zno-based
The volume multiple of quasi- solution；V1、V2、V0, V unit be mL；The unit of m is g.
Specifically, above-mentioned c and f can be determined by following methods：(a) accurately weighing volume is V3The quasi- solution of zno-based
As the second titrating solution；(b) NH is added into the second titrating solution4Cl-NH3·H2O buffer solution and chromium black T indicator use
EDTA standard solution is titrated to solution and sports Celeste by claret, records the dosage V of the EDTA standard solution4；(c) lead to
The concentration c that formula 2 calculates EDTA standard solution is crossed, the body of the comparable EDTA standard solution of the quasi- solution of 1mL zno-based is calculated by formula 3
Product multiple f,
F=V4/V3Formula 3
In formula 2, c (ZnO) indicates the concentration of the quasi- solution of zno-based, unit mol/L；Also, V3、V4Unit be
mL。
In above-mentioned steps, used NH4Cl-NH3·H2The general preparation method of O buffer solution is：Weigh 20g
NH4Cl (A.R.) is soluble in water, and the NH of 80mL 25% is added thereto3·H2O (A.R.) solution, shakes up, and be diluted to 1L i.e.
It can；Meanwhile used titrant EDTA standard solution is generally required and is demarcated in advance, to determine that its actual concentrations is (accurate
To 0.0001mol/L), general scaling method is：The quasi- solution of 10mL zno-based accurately is pipetted as titrating solution, is added thereto
The NH of 10mL pH=104Cl-NH3·H2O buffer solution and 10 drop chromium black T indicators, are titrated to molten with EDTA standard solution
Until liquid sports Celeste by claret, the volume of the EDTA standard solution of consumption is recorded, parallel laboratory test three times is carried out, takes it
Average value calculates the actual concentrations for obtaining EDTA standard solution.Above-mentioned NH4Cl-NH3·H2The preparation method of O buffer solution and
The scaling method of EDTA standard solution is the ordinary skill in the art, and those skilled in the art can also refer in the art other
The method of equivalent effect.
In this way, the present invention makes portion by the EDTA standard solution of the excessive addition into the solution of aluminium lithium alloy to be titrated
Divide EDTA that Al is complexed3+, back titration is then carried out by the quasi- solution of zno-based and (Al is not complexed in titration titrating solution3+EDTA),
To calculate the Al obtained in titrating solution by minusing3+Content.The measuring method quick and precisely, with chromium black T indicator
Indicate titration process, indicator discoloration is sharp, and titration end-point is obvious, easily recognizable；Meanwhile the measuring method only relies upon routine
Chemical analysis apparatus (i.e. titration device), be not based on instrument analysis and carry out, without expensive instrument and equipment is enough bought, be parsed into
This is cheap.
Aluminum content tests method in above-mentioned aluminium lithium alloy, but this field will be embodied by specific embodiment below
Technical staff implements below it should be understood that measuring method of the invention is not limited to range described in following embodiments
Example is only the specific example and application of said determination method.
Embodiment 1
Accurately pipette quasi- solution 10.00mL (the i.e. V of zno-based of 0.05139mol/L3) in conical flask, 10mL pH is added
=10 NH4Cl-NH3·H2O buffer solution, 10 drop chromium black T indicators, is titrated to solution by claret with EDTA standard solution
Become Celeste, be denoted as terminal, the volume (being measured in parallel three times, take its average value) of record consumption EDTA standard solution is respectively
9.60mL, 9.60mL, 9.59mL, then V4=9.60mL；It is calculated by formula 2 and formula 3 it is found that c=0.05393mol/L, f=
0.96。
The aluminium lithium alloy 0.4871g for accurately weighing bright cleaning (i.e. m) in small crucible, is placed in boiling water bath, is added few
After measuring water wetting, it is 1 that volume ratio, which is added,:1 HNO3It makes it completely dissolved；Heating stirring is shifted after being cooled to room temperature to slightly boiled
Into 100mL volumetric flask, with deionized water dilution and constant volume, shakes up, obtain sample.
5.00mL sample accurately is pipetted in 250mL conical flask, and adjusting its pH is 2~3, accurate that 20.00mL EDTA is added
Standard solution boils a few minutes, slightly cool rear adjusting pH weakly acidic pH；Continue the NH that 10mL pH=10 is added thereto4Cl-NH3·
H2O buffer solution and 10 drop chromium black T indicators, with the quasi- solution of zno-based titrate in the titrating solution excessive EDTA to solution by
Blue-green becomes pure blue, is denoted as terminal, records the dosage (being measured in parallel three times, take its average value) of the quasi- solution of zno-based
8.90mL, 8.89mL, 8.90mL, then V=8.90mL.
The content of aluminium is in foundation calculating the taken aluminium lithium alloy of the present embodiment of formula 1：
Embodiment 2
In the description of embodiment 2, the concentration c and the quasi- solution of 1mL zno-based about EDTA standard solution are comparable
The measurement of the volume multiple f of EDTA standard solution only describes aluminium lithium alloy in the present embodiment referring to described in embodiment 1 below
Pre-treatment and titrimetry process.
The aluminium lithium alloy 0.5021g for accurately weighing bright cleaning (i.e. m) in small crucible, is placed in boiling water bath, is added few
After measuring water wetting, it is 1 that volume ratio, which is added,:1 HCl makes it completely dissolved；Heating stirring is transferred to slightly boiled after being cooled to room temperature
In 100mL volumetric flask, with deionized water dilution and constant volume, shakes up, obtain sample.
5.00mL sample accurately is pipetted in 250mL conical flask, and adjusting its pH is 2~3, accurate that 20.00mL EDTA is added
Standard solution boils a few minutes, slightly cool rear adjusting pH weakly acidic pH；Continue the NH that 10mL pH=10 is added thereto4Cl-NH3·
H2O buffer solution and 10 drop chromium black T indicators, with the quasi- solution of zno-based titrate in the titrating solution excessive EDTA to solution by
Blue-green becomes pure blue, is denoted as terminal, records the dosage (being measured in parallel three times, take its average value) of the quasi- solution of zno-based
6.56mL, 6.57mL, 6.55mL, then V=6.56mL.
The content of aluminium is in foundation calculating the taken aluminium lithium alloy of the present embodiment of formula 1：
Embodiment 3
In the description of embodiment 3, the concentration c and the quasi- solution of 1mL zno-based about EDTA standard solution are comparable
The measurement of the volume multiple f of EDTA standard solution only describes aluminium lithium alloy in the present embodiment referring to described in embodiment 1 below
Pre-treatment and titrimetry process.
The aluminium lithium alloy 0.5217g for accurately weighing bright cleaning (i.e. m) in small crucible, is placed in boiling water bath, is added few
After measuring water wetting, it is 1 that volume ratio, which is added,:1 HCl makes it completely dissolved；Heating stirring is transferred to slightly boiled after being cooled to room temperature
In 100mL volumetric flask, with deionized water dilution and constant volume, shakes up, obtain sample.
5.00mL sample accurately is pipetted in 250mL conical flask, and adjusting its pH is 2~3, accurate that 25.00mL EDTA is added
Standard solution boils a few minutes, slightly cool rear adjusting pH weakly acidic pH；Continue the NH that 10mL pH=10 is added thereto4Cl-NH3·
H2O buffer solution and 10 drop chromium black T indicators, with the quasi- solution of zno-based titrate in the titrating solution excessive EDTA to solution by
Blue-green becomes pure blue, is denoted as terminal, records the dosage (being measured in parallel three times, take its average value) of the quasi- solution of zno-based
10.21mL, 10.22mL, 10.22mL, then V=10.22mL.
The content of aluminium is in foundation calculating the taken aluminium lithium alloy of the present embodiment of formula 1：
Although the present invention has shown and described referring to specific embodiment, it should be appreciated by those skilled in the art that：
In the case where not departing from the spirit and scope of the present invention being defined by the claims and their equivalents, can carry out herein form and
Various change in details.
Claims (9)
1. a kind of aluminum content tests method in aluminium lithium alloy, which is characterized in that including step：
S1, sour molten, acquisition alloy acid solution is carried out after soaking on the surface for the aluminium lithium alloy that quality is m with water；
S2, the alloy acid solution is transferred to volume for V1Volumetric flask in and constant volume, obtain sample；
S3, volume is pipetted accurately as V2The sample as titration stoste, the pH of the titration stoste is adjusted to 2~3, and
It is V that volume is added thereto0EDTA standard solution, then adjust its pH be 6~8, obtain the first titrating solution；Wherein, V0Addition
Volumetric usage of the amount not less than the corresponding EDTA standard solution of metallic aluminium that quality is m；
S4, NH is added into first titrating solution4Cl-NH3·H2O buffer solution and chromium black T indicator, it is molten using zno-based standard
Liquid is titrated to solution and sports pure blue by blue-green, records the dosage V of the quasi- solution of the zno-based；
S5, the content that aluminium in the aluminium lithium alloy is calculated according to formula 1,
In formula 1, w (Al) indicates the mass percent of aluminium in aluminium lithium alloy；
C indicates the concentration of the EDTA standard solution, unit mol/L；
M indicates the relative atomic mass of aluminium, unit g/mol；
The volume multiple of the f expression comparable EDTA standard solution of the quasi- solution of 1mL zno-based；
V1、V2、V0, V unit be mL；The unit of m is g.
2. measuring method according to claim 1, which is characterized in that the preparation method of the quasi- solution of zno-based is：
ZnO is heat-treated to constant weight；
It accurately weighs the ZnO through Overheating Treatment and carries out sour molten, acquisition Zn acid solution；Wherein, the dosage of the ZnO is accurate to
0.0001g；
By Zn acid solution dilution and constant volume, the quasi- solution of the zno-based is obtained.
3. measuring method according to claim 2, which is characterized in that the acid solution of the molten ZnO of acid is concentrated hydrochloric acid.
4. measuring method according to claim 1, which is characterized in that the determination method of c and f is：
Accurately weighing volume is V3The quasi- solution of the zno-based as the second titrating solution；
NH is added into second titrating solution4Cl-NH3·H2O buffer solution and chromium black T indicator, using the EDTA standard
Solution is titrated to solution and sports Celeste by claret, records the dosage V of the EDTA standard solution4；
The concentration c that the EDTA standard solution is calculated by formula 2 calculates the comparable EDTA of the quasi- solution of 1mL zno-based by formula 3 and marks
The volume multiple f of quasi- solution,
F=V4/V3Formula 3
In formula 2, c (ZnO) indicates the concentration of the quasi- solution of zno-based, unit mol/L；
V3、V4Unit be mL.
5. measuring method according to claim 1 to 4, which is characterized in that in the step S3, addition volume is V0
EDTA standard solution after, boil solution keep 3min~5min after, then adjust its pH be 6~8.
6. measuring method according to claim 1 to 4, which is characterized in that in the step S1, using volume ratio
It is 1:1 HNO3Solution or 1:The 1 molten aluminium lithium alloy of HCl solution acid.
7. measuring method according to claim 1 to 4, which is characterized in that in the step S2, first by the conjunction
Auric acid solution heating stirring transfers in the volumetric flask after cooling to boiling.
8. measuring method according to claim 1, which is characterized in that in the step S2, V1For 100.00mL；Institute
It states in step S3, V2For 5.00mL；In the step S4, the NH4Cl-NH3·H2The additive amount of O buffer solution is 10mL,
The additive amount of the chromium black T indicator is 10 drops.
9. measuring method according to claim 1, which is characterized in that in the step S1, the value range of m is 0.4g
~0.6g.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115060845A (en) * | 2022-05-20 | 2022-09-16 | 西部矿业股份有限公司 | Method for analyzing and detecting aluminum element in magnesium-aluminum hydrotalcite |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102419325A (en) * | 2011-07-27 | 2012-04-18 | 中国科学院青海盐湖研究所 | Method for determining strontium calcium barium in strontium carbonate |
| CN105203698A (en) * | 2015-10-22 | 2015-12-30 | 商洛天野高新材料有限公司 | Method for directly determining aluminum content in aluminum-niobium alloy |
-
2018
- 2018-07-11 CN CN201810755064.0A patent/CN108918754A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102419325A (en) * | 2011-07-27 | 2012-04-18 | 中国科学院青海盐湖研究所 | Method for determining strontium calcium barium in strontium carbonate |
| CN105203698A (en) * | 2015-10-22 | 2015-12-30 | 商洛天野高新材料有限公司 | Method for directly determining aluminum content in aluminum-niobium alloy |
Non-Patent Citations (2)
| Title |
|---|
| 李亚宁 等: "《环境化学与生物学监测实验技术》", 30 November 2013, 南开大学出版社 * |
| 李晓莉: "《分析化学》", 31 May 2017, 中国轻工业出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115060845A (en) * | 2022-05-20 | 2022-09-16 | 西部矿业股份有限公司 | Method for analyzing and detecting aluminum element in magnesium-aluminum hydrotalcite |
| CN115060845B (en) * | 2022-05-20 | 2024-05-03 | 西部矿业股份有限公司 | Analysis and detection method for aluminum element in magnesium aluminum hydrotalcite |
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