CN108918507A - A kind of method of copper content in measurement sodium chloride - Google Patents
A kind of method of copper content in measurement sodium chloride Download PDFInfo
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- CN108918507A CN108918507A CN201810829388.4A CN201810829388A CN108918507A CN 108918507 A CN108918507 A CN 108918507A CN 201810829388 A CN201810829388 A CN 201810829388A CN 108918507 A CN108918507 A CN 108918507A
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/71—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light thermally excited
- G01N21/73—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light thermally excited using plasma burners or torches
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
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Abstract
The invention discloses a kind of methods with copper content in inductively coupled plasma atomic emission spectrometer measurement sodium chloride, belong to technical field of chemical detection, it includes sample pre-treatment, dull platinum grid nebuliser adjustment, the preparation of copper calibration curve, precision, realizes the target of copper content in accurate detection sodium chloride.Measurement range：w(Cu)0.1×10‑6~100 × 10‑6.The present invention solves the problems, such as the detection technique of copper trace in sodium chloride, for correct selection, evaluation and the prediction paint film corrosion resistance and service life of widely used salt spray test sodium chloride brine in the world, provides strong technical support.Detection field top standard is reached.
Description
Technical field
The invention belongs to chemical element detection technique field, in particular to the inductive coupling etc. of copper content in a kind of sodium chloride
Plasma-atomic emission spectrometer quantitative analysis method, measurement range：w(Cu)0.1×10-6~100 × 10-6。
Background technique
《Plasma emission spectrometry》(Xin Ren writes pavilion, Chemical Industry Press, January the 1st edition in 2005), the
Page 228 have S in seawater, B, Na, and the measuring method of Ca element is ARL 35000 using spectrometer, is not directed to Cu element in seawater
Measuring method；Page 231 has extracting and enriching Trace Elements In Seawater, though there is Cu element, needs great using toxicity
Organic solvent carries out extracting and enriching, meanwhile, it also needs that pyrrolidines curing carbamic acid ammonium reagent, nitro benzene diluter etc. is added,
Easy purity problem causes blank value to increase；Page 232 has the separation and concentration of trace element and measurement in saturation refined brine, will be saturated
Refined brine is evaporated, and process is longer due to being evaporated, and easily causes the generation of the contamination phenomenons such as dissolution of trace element in container containing, not
It is related to being saturated the measuring method of Cu element in refined brine；Have no the preparation for using sodium chloride sample to carry out copper calibration curve
Method.Now have no national standard prevailing for the time being in force, professional standard, provincial standard, copper content chemistry point in company standard sodium chloride
Analysis method.
GB/T 1266—2006《Chemical reagent sodium chloride》In technical conditions, copper content technical requirement is had no；GB/T
10125—2012《Artificial atmosphere corrosion test salt spray test》, it is desirable that copper content is not more than 0.001% in sodium chloride；GB/T
2423.17—2008《Electric and electronic product environmental test part 2：Test method tests Ka：Salt fog》, it is desirable that it is miscellaneous in sodium chloride
Matter total amount is not more than 0.3%, does not require individually copper content；The salt spray test standard requirements of ASTM B117-2016, sodium chloride
Middle copper content is not more than 0.3 × 10-6。
Summary of the invention
The object of the invention is in order to overcome the shortcomings of above-mentioned background technique, and provides and a kind of use inductively coupled plasma
The method that body Atomic Emission Spectrometer AES measures copper content in sodium chloride.
In method of the invention, 5.0000g sample is weighed, is placed in 100mL steel volumetric flask, ultrapure water is added, to molten
After solution is complete, scale is diluted to ultrapure water, is shaken up.On inductively coupled plasma atomic emission spectrometer, double platinum are selected
Net atomizer, using dull platinum grid nebuliser under preceding disassembly, to take out translucent grains solid, peristaltic pump for being atomized test solution
Feed liquor flow velocity is 1.4mL/min, is pumped into test solution again after plasma yellow flame disappears in detection process.Copper is measured respectively
The emitted luminescence intensity of copper, shows that the quality of copper in test solution is dense by detecting instrument equipment automatically in calibration solution, test solution
Then degree obtains the mass fraction of copper in sample by conversion again.
The method of copper content in measurement sodium chloride according to the present invention, its step are as follows：
Step 1：Sample pre-treatment
With a ten thousandth electronic balance, 5.0000g sample is weighed, is placed in 100mL steel volumetric flask, it is ultrapure that 25mL is added
Water, it is to be dissolved completely after, scale is diluted to ultrapure water, is shaken up；
Step 2：Dull platinum grid nebuliser adjustment
Dull platinum grid nebuliser is selected, using dull platinum grid nebuliser under preceding disassembly, to take out translucent crystalline substance for being atomized test solution
Granular solids, peristaltic pump feed liquor flow velocity are 1.4mL/min, are pumped into again after plasma yellow flame disappears in detection process
Test solution；
Step 3：The optimization of instrument operating condition
Open inductively coupled plasma atomic emission spectrometer ICP-AES, preheater apparatus equipment 2h or more.According to instrument
Specification optimizes instrument operating condition, selects suitable measuring condition：Such as argon pressure, observed altitude, analytical line, punching
Wash time, the time of integration, integral number of times etc.；
Using Prodigy XP type inductively coupled plasma atomic emission spectrometer, the optimization measuring condition selected as
Recommended work parameter；RF power：1100W；Argon gas input pressure：85~95PSI；Pump speed：1.4mL/min；Cooling gas flow：
19L/min；Secondary air amount：0.0L/min；Atomization gas pressure：52PSI；Plasmatorch observed altitude：15mm；Sample injection time：
30s；The time of integration：10s；Purity of argon：Not less than 99.99%；
Instrument operating condition optimization after, in element determination wavelength spectral line, according to copper content range, linear relationship,
The rate of recovery, testing result accuracy are comprehensively considered, and suitable measurement wavelength is selected.Selected measurement wavelength is：Cu
324.754nm；
Step 4：Copper is calibrated solution and is prepared
1.0000g purity >=99.9% metallic copper is dissolved by heating in 30mL1+1 nitric acid solution, is moved into after cooling
In 1000mL steel volumetric flask, when being diluted to about 3/4 volume with ultrapure water, several times by steel volumetric flask yawing, it is sure not to reverse and shakes
It is dynamic, make preliminary mix；It then proceedes to that ultrapure water is added, when nearly graduation mark, is carefully added dropwise with dropper, until copper is molten
Until the minimum point and graduation mark of the lower meniscus of liquid are tangent；Cover tightly glass stopper；Left index finger pins glass stopper, and the right hand refers to
Bottom of bottle edge is lived on pinnacle, steel volumetric flask the other way around and is shaken, then the other way around, the bubble in solution is made to rise to top
End 10~15 times repeatedly, mixes；This is copper standard solution I, this solution 1mL copper containing 1mg；
2.00mL copper standard solution I is pipetted, is placed in 100mL steel volumetric flask, scale is diluted to ultrapure water, is mixed
It is even.This is copper standard solution II, this solution 1mL contains 20 μ g copper；
10.00mL copper standard solution II is pipetted, is placed in 200mL steel volumetric flask, scale is diluted to ultrapure water,
It mixes, this is copper standard solution III, this solution 1mL contains 1 μ g copper；
Step 5：The preparation of copper calibration curve
Copper calibration curve is 1.：Six parts of 5.0000g sample are weighed, is placed in 100mL steel volumetric flask, it is super that 50mL is added
Pure water, it is to be dissolved completely after, shake up.0.00,0.50,1.00,2.00,3.00,5.00mL copper standard solution are pipetted respectively
III, this solution 1mL contain 1 μ g copper, are placed in six 100mL steel volumetric flasks, are diluted to scale with ultrapure water, mix；It is suitable for
Measure w (Cu) 0.1 × 10-6~1.0 × 10-6；
Copper calibration curve is 2.：Six parts of 5.0000g sample are weighed, is placed in 100mL steel volumetric flask, it is super that 50mL is added
Pure water, it is to be dissolved completely after, shake up；0.00,0.50,1.00,2.00,3.00,5.00mL copper standard solution are pipetted respectively
II, it is placed in six 100mL steel volumetric flasks, scale is diluted to ultrapure water, mix；By adjusting sample weighting amount, it is suitable for surveying
Determine w (Cu) 1.0 × 10-6~100 × 10-6；
Step 6：Inductively coupled plasma atomic emission spectrometer detection
It clicks plasmatorch to automatically begin to igniting, confirms instrument operating parameter in the normal range after igniting, atomization system
System and plasma torch are working properly, stabilizer instrument 15min or more；
In the spectral intensity on inductively coupled plasma atomic emission spectrometer, measuring copper in solution to be measured.With
It is net spectral intensity that each spectral intensity, which subtracts blank solution spectral intensity,；Instrument reads the content of copper in solution to be measured automatically
ρ(Cu)；
Step 7：Analyze the calculating of result
It according to the mass concentration of copper in sample solution, is indicated with mg/mL, to calculate the quality of copper content in sodium chloride
Score：
Copper content is calculated in terms of mass fraction w (Cu) by formula (1) in sodium chloride sample：
In formula：
ρ (Cu) --- the numerical value of the mass concentration of copper in test solution, unit are every milliliter of milligram (mg/mL)；
V --- the numerical value of test solution volume, unit are milliliter (mL)；
M --- the numerical value of sample quality, unit are gram (g)；
Step 8：Recovery test
According to the optimal conditions of selection, copper standard solution is added, makees recovery test, the rate of recovery=(measurement resultant-
Sample content)/additional amount × 100%.It is 80%~120% that general provision, which requires the rate of recovery,；It is a kind of to use inductively coupled plasma
The method rate of recovery that body Atomic Emission Spectrometer AES measures copper content in sodium chloride is 90%~110%, referring to table 2；Illustrate this inspection
Survey method measurement result is accurate and reliable；
2 recovery test result of table
| Number | Sample content/10-6 | Additional amount/10-6 | Measure resultant/10-6 | Alluvial/10-6 | The rate of recovery/% |
| 11# | 0.22 | 0.20 | 0.44 | 0.24 | 110 |
| 12# | 1.6 | 2.0 | 3.4 | 1.4 | 90 |
| 13# | 5.3 | 5.0 | 10.4 | 5.4 | 108 |
Step 8：Production examination analysis result
Using a kind of inductively coupled plasma atomic emission spectrum detection method of copper coin cellulose content in sodium chloride, treat
It surveys sodium chloride sample and has carried out detection and precision test, production examination analysis result is referring to table 3；Its analysis result accurately may be used
It leans on.
The production examination analysis result of table 3
Beneficial effects of the present invention：
1. establishing the quantitative detection side with inductively coupled plasma atomic emission spectrometer to copper content in sodium chloride
Method；
2. measurement range：w(Cu)0.1×10-6~100 × 10-6；
3. precision：
1 reproducibility numerical value of table
4. solving the problems, such as the detection technique of sodium chloride matrix severe jamming copper coin cellulose content to be measured in detection process.
Specific embodiment
The present invention is described in detail with reference to embodiments.
Embodiment
The detection method of copper coin cellulose content in sodium chloride involved in the present embodiment, steps are as follows：
Step 1：Sample pre-treatment
With a ten thousandth electronic balance, 5.0000g sample is weighed, is placed in 100mL steel volumetric flask, it is ultrapure that 25mL is added
Water, it is to be dissolved completely after, scale is diluted to ultrapure water, is shaken up；
Step 2：Dull platinum grid nebuliser adjustment
Dull platinum grid nebuliser is selected, using dull platinum grid nebuliser under preceding disassembly, to take out translucent crystalline substance for being atomized test solution
Granular solids, peristaltic pump feed liquor flow velocity are 1.4mL/min, are pumped into again after plasma yellow flame disappears in detection process
Test solution；
Step 3：The optimization of instrument operating condition
Open inductively coupled plasma atomic emission spectrometer ICP-AES, preheater apparatus equipment 2h or more.According to instrument
Specification optimizes instrument operating condition, selects suitable measuring condition：Such as argon pressure, observed altitude, analytical line, punching
Wash time, the time of integration, integral number of times etc.；
Using Prodigy XP type inductively coupled plasma atomic emission spectrometer, the optimization measuring condition selected as
Recommended work parameter；RF power：1100W；Argon gas input pressure：85~95PSI；Pump speed：1.4mL/min；Cooling gas flow：
19L/min；Secondary air amount：0.0L/min；Atomization gas pressure：52PSI；Plasmatorch observed altitude：15mm；Sample injection time：
30s；The time of integration：10s；Purity of argon：Not less than 99.99%；
Instrument operating condition optimization after, in element determination wavelength spectral line, according to copper content range, linear relationship,
The rate of recovery, testing result accuracy are comprehensively considered, and suitable measurement wavelength is selected.Selected measurement wavelength is：Cu
324.754nm；
Step 4：Copper is calibrated solution and is prepared
1.0000g purity >=99.9% metallic copper is dissolved by heating in 30mL1+1 nitric acid solution, is moved into after cooling
In 1000mL steel volumetric flask, when being diluted to about 3/4 volume with ultrapure water, several times by steel volumetric flask yawing, it is sure not to reverse and shakes
It is dynamic, make preliminary mix；It then proceedes to that ultrapure water is added, when nearly graduation mark, is carefully added dropwise with dropper, until copper is molten
Until the minimum point and graduation mark of the lower meniscus of liquid are tangent；Cover tightly glass stopper；Left index finger pins glass stopper, and the right hand refers to
Bottom of bottle edge is lived on pinnacle, steel volumetric flask the other way around and is shaken, then the other way around, the bubble in solution is made to rise to top
End 10~15 times repeatedly, mixes；This is copper standard solution I, this solution 1mL copper containing 1mg；
2.00mL copper standard solution I is pipetted, is placed in 100mL steel volumetric flask, scale is diluted to ultrapure water, is mixed
It is even.This is copper standard solution II, this solution 1mL contains 20 μ g copper；
10.00mL copper standard solution II is pipetted, is placed in 200mL steel volumetric flask, scale is diluted to ultrapure water,
It mixes, this is copper standard solution III, this solution 1mL contains 1 μ g copper；
Step 5：The preparation of copper calibration curve
Copper calibration curve is 1.：Six parts of 5.0000g sample are weighed, is placed in 100mL steel volumetric flask, it is super that 50mL is added
Pure water, it is to be dissolved completely after, shake up.0.00,0.50,1.00,2.00,3.00,5.00mL copper standard solution are pipetted respectively
III, this solution 1mL contain 1 μ g copper, are placed in six 100mL steel volumetric flasks, are diluted to scale with ultrapure water, mix；It is suitable for
Measure w (Cu) 0.1 × 10-6~1.0 × 10-6；
Copper calibration curve is 2.：Six parts of 5.0000g sample are weighed, is placed in 100mL steel volumetric flask, it is super that 50mL is added
Pure water, it is to be dissolved completely after, shake up；0.00,0.50,1.00,2.00,3.00,5.00mL copper standard solution are pipetted respectively
II, it is placed in six 100mL steel volumetric flasks, scale is diluted to ultrapure water, mix；By adjusting sample weighting amount, it is suitable for surveying
Determine w (Cu) 1.0 × 10-6~100 × 10-6；
Step 6：Inductively coupled plasma atomic emission spectrometer detection
It clicks plasmatorch to automatically begin to igniting, confirms instrument operating parameter in the normal range after igniting, atomization system
System and plasma torch are working properly, stabilizer instrument 15min or more；
In the spectral intensity on inductively coupled plasma atomic emission spectrometer, measuring copper in solution to be measured.With
It is net spectral intensity that each spectral intensity, which subtracts blank solution spectral intensity,；Instrument reads the content of copper in solution to be measured automatically
ρ(Cu)；
Step 7：Analyze the calculating of result
It according to the mass concentration of copper in sample solution, is indicated with mg/mL, to calculate the quality of copper content in sodium chloride
Score：
Copper content is calculated in terms of mass fraction w (Cu) by formula (1) in sodium chloride sample：
In formula：
ρ (Cu) --- the numerical value of the mass concentration of copper in test solution, unit are every milliliter of milligram (mg/mL)；
V --- the numerical value of test solution volume, unit are milliliter (mL)；
M --- the numerical value of sample quality, unit are gram (g)；
Step 8：Recovery test
According to the optimal conditions of selection, copper standard solution is added, makees recovery test, the rate of recovery=(measurement resultant-
Sample content)/additional amount × 100%.It is 80%~120% that general provision, which requires the rate of recovery,；It is a kind of to use inductively coupled plasma
The method rate of recovery that body Atomic Emission Spectrometer AES measures copper content in sodium chloride is 90%~110%, referring to table 2；Illustrate this inspection
Survey method measurement result is accurate and reliable；
2 recovery test result of table
| Number | Sample content/10-6 | Additional amount/10-6 | Measure resultant/10-6 | Alluvial/10-6 | The rate of recovery/% |
| 11# | 0.22 | 0.20 | 0.44 | 0.24 | 110 |
| 12# | 1.6 | 2.0 | 3.4 | 1.4 | 90 |
| 13# | 5.3 | 5.0 | 10.4 | 5.4 | 108 |
Step 8：Production examination analysis result
Using a kind of inductively coupled plasma atomic emission spectrum detection method of copper coin cellulose content in sodium chloride, treat
It surveys sodium chloride sample and has carried out detection and precision test, production examination analysis result is referring to table 3；Its analysis result accurately may be used
It leans on.
The production examination analysis result of table 3
Claims (1)
1. a kind of method of copper content in measurement sodium chloride, it is characterized in that steps are as follows：
Step 1：Sample pre-treatment
With a ten thousandth electronic balance, 5.0000g sample is weighed, is placed in 100mL steel volumetric flask, 25mL ultrapure water is added,
It is to be dissolved completely after, scale is diluted to ultrapure water, is shaken up；
Step 2：Dull platinum grid nebuliser adjustment
Dull platinum grid nebuliser is selected, using dull platinum grid nebuliser under preceding disassembly, to take out translucent grains for being atomized test solution
Solid, peristaltic pump feed liquor flow velocity are 1.4mL/min, are pumped into examination again after plasma yellow flame disappears in detection process
Liquid；
Step 3：The optimization of instrument operating condition
Open inductively coupled plasma atomic emission spectrometer ICP-AES, preheater apparatus equipment 2h or more.Illustrate according to instrument
Book optimizes instrument operating condition, selects suitable measuring condition：When such as argon pressure, observed altitude, analytical line, flushing
Between, the time of integration, integral number of times etc.；
Using Prodigy XP type inductively coupled plasma atomic emission spectrometer, the optimization measuring condition selected is as recommendation
Running parameter；RF power：1100W；Argon gas input pressure：85~95PSI；Pump speed：1.4mL/min；Cooling gas flow：19L/
min；Secondary air amount：0.0L/min；Atomization gas pressure：52PSI；Plasmatorch observed altitude：15mm；Sample injection time：30s；
The time of integration：10s；Purity of argon：Not less than 99.99%；
After the optimization of instrument operating condition, in element determination wavelength spectral line, according to copper content range, linear relationship, recycling
Rate, testing result accuracy are comprehensively considered, and suitable measurement wavelength is selected.Selected measurement wavelength is：Cu
324.754nm；
Step 4：Copper is calibrated solution and is prepared
1.0000g purity >=99.9% metallic copper is dissolved by heating in 30mL1+1 nitric acid solution, moves into 1000mL steel after cooling
In iron volumetric flask, when being diluted to about 3/4 volume with ultrapure water, several times by steel volumetric flask yawing, it is sure not to reverse and shakes, make preliminary
It mixes；It then proceedes to that ultrapure water is added, when nearly graduation mark, is carefully added dropwise with dropper, until curved under copper solution
Until the minimum point and graduation mark of lunar surface are tangent；Cover tightly glass stopper；Left index finger pins glass stopper, and right hand finger tip withstands bottle
Steel volumetric flask the other way around and is shaken, then the other way around, the bubble in solution is made to rise to top by feather edge, so anti-
It is 10~15 times multiple, it mixes；This is copper standard solution I, this solution 1mL copper containing 1mg；
2.00mL copper standard solution I is pipetted, is placed in 100mL steel volumetric flask, scale is diluted to ultrapure water, is mixed.
This is copper standard solution II, this solution 1mL contains 20 μ g copper；
10.00mL copper standard solution II is pipetted, is placed in 200mL steel volumetric flask, scale is diluted to ultrapure water, is mixed
Even, this is copper standard solution III, this solution 1mL contains 1 μ g copper；
Step 5：The preparation of copper calibration curve
Copper calibration curve is 1.：Six parts of 5.0000g sample are weighed, is placed in 100mL steel volumetric flask, it is ultrapure that 50mL is added
Water, it is to be dissolved completely after, shake up.0.00,0.50,1.00,2.00,3.00,5.00mL copper standard solution III are pipetted respectively,
This solution 1mL contains 1 μ g copper, is placed in six 100mL steel volumetric flasks, is diluted to scale with ultrapure water, mixes；Suitable for measurement
w(Cu)0.1×10-6~1.0 × 10-6；
Copper calibration curve is 2.：Six parts of 5.0000g sample are weighed, is placed in 100mL steel volumetric flask, it is ultrapure that 50mL is added
Water, it is to be dissolved completely after, shake up；0.00,0.50,1.00,2.00,3.00,5.00mL copper standard solution II are pipetted respectively,
It is placed in six 100mL steel volumetric flasks, scale is diluted to ultrapure water, mix；By adjusting sample weighting amount, it is suitable for measurement w
(Cu)1.0×10-6~100 × 10-6；
Step 6：Inductively coupled plasma atomic emission spectrometer detection
Click plasmatorch to automatically begin to igniting, confirm instrument operating parameter in the normal range after igniting, atomization system and
Plasma torch is working properly, stabilizer instrument 15min or more；
In the spectral intensity on inductively coupled plasma atomic emission spectrometer, measuring copper in solution to be measured.With each light
It is net spectral intensity that spectral intensity, which subtracts blank solution spectral intensity,；Instrument reads the content ρ of copper in solution to be measured automatically
(Cu)；
Step 7：Analyze the calculating of result
It according to the mass concentration of copper in sample solution, is indicated with mg/mL, to calculate the quality point of copper content in sodium chloride
Number：
Copper content is calculated in terms of mass fraction w (Cu) by formula (1) in sodium chloride sample：
In formula：
ρ (Cu) --- the numerical value of the mass concentration of copper in test solution, unit are every milliliter of milligram (mg/mL)；
V --- the numerical value of test solution volume, unit are milliliter (mL)；
M --- the numerical value of sample quality, unit are gram (g)；
Step 8：Recovery test
According to the optimal conditions of selection, copper standard solution is added, makees recovery test, the rate of recovery=(measurement resultant-sample
Content)/additional amount × 100%.It is 80%~120% that general provision, which requires the rate of recovery,；It is a kind of former with inductance coupled plasma
The method rate of recovery of copper content is 90%~110% in sub- emission spectrometer measurement sodium chloride, referring to table 2；Illustrate this detection side
Method measurement result is accurate and reliable；
2 recovery test result of table
Step 8：Production examination analysis result
This method has carried out detection and precision test to sodium chloride sample to be measured, and production examination analysis result is referring to table 3；Its
It is accurate and reliable to analyze result.
The production examination analysis result of table 3
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110823866A (en) * | 2019-10-14 | 2020-02-21 | 重庆长安工业(集团)有限责任公司 | Method for testing copper content in sodium chloride |
| CN113418879A (en) * | 2021-06-24 | 2021-09-21 | 宁夏新龙蓝天科技股份有限公司 | Copper chloride solution detection method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106596516A (en) * | 2016-11-09 | 2017-04-26 | 重庆长安工业(集团)有限责任公司 | Method of measuring trace lead content of tin bronze by means of standard addition-ICP atomic emission spectrometer |
| CN107219200A (en) * | 2017-05-26 | 2017-09-29 | 马鞍山钢铁股份有限公司 | The method that inductively coupled plasma atomic emission spectrometry determines W content in molybdenum-iron |
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2018
- 2018-07-25 CN CN201810829388.4A patent/CN108918507A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106596516A (en) * | 2016-11-09 | 2017-04-26 | 重庆长安工业(集团)有限责任公司 | Method of measuring trace lead content of tin bronze by means of standard addition-ICP atomic emission spectrometer |
| CN107219200A (en) * | 2017-05-26 | 2017-09-29 | 马鞍山钢铁股份有限公司 | The method that inductively coupled plasma atomic emission spectrometry determines W content in molybdenum-iron |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110823866A (en) * | 2019-10-14 | 2020-02-21 | 重庆长安工业(集团)有限责任公司 | Method for testing copper content in sodium chloride |
| CN113418879A (en) * | 2021-06-24 | 2021-09-21 | 宁夏新龙蓝天科技股份有限公司 | Copper chloride solution detection method |
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