CN114371186B - Method for overcoming particle size effect of alloy element measured by XRF powder tabletting method - Google Patents
Method for overcoming particle size effect of alloy element measured by XRF powder tabletting method Download PDFInfo
- Publication number
- CN114371186B CN114371186B CN202210017828.2A CN202210017828A CN114371186B CN 114371186 B CN114371186 B CN 114371186B CN 202210017828 A CN202210017828 A CN 202210017828A CN 114371186 B CN114371186 B CN 114371186B
- Authority
- CN
- China
- Prior art keywords
- sample
- particle size
- analyzed
- standard
- less
- 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
- 239000002245 particle Substances 0.000 title claims abstract description 53
- 238000000034 method Methods 0.000 title claims abstract description 33
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 21
- 239000000956 alloy Substances 0.000 title claims abstract description 21
- 239000000843 powder Substances 0.000 title claims abstract description 17
- 230000005476 size effect Effects 0.000 title abstract description 7
- 238000004458 analytical method Methods 0.000 claims abstract description 32
- 238000001514 detection method Methods 0.000 claims abstract description 15
- 235000019580 granularity Nutrition 0.000 claims abstract description 15
- 239000000203 mixture Substances 0.000 claims abstract description 15
- 238000000227 grinding Methods 0.000 claims abstract description 14
- 238000004876 x-ray fluorescence Methods 0.000 claims abstract description 10
- 230000000694 effects Effects 0.000 claims abstract description 9
- 238000001228 spectrum Methods 0.000 claims description 4
- 229910052500 inorganic mineral Inorganic materials 0.000 abstract description 2
- 239000011707 mineral Substances 0.000 abstract description 2
- 238000010183 spectrum analysis Methods 0.000 abstract description 2
- 238000012216 screening Methods 0.000 abstract 1
- 238000004846 x-ray emission Methods 0.000 description 10
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 7
- 229910000640 Fe alloy Inorganic materials 0.000 description 5
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 4
- 238000009826 distribution Methods 0.000 description 4
- 238000005464 sample preparation method Methods 0.000 description 4
- 229910000838 Al alloy Inorganic materials 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 238000005275 alloying Methods 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 229910001309 Ferromolybdenum Inorganic materials 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 2
- 239000004327 boric acid Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000004570 mortar (masonry) Substances 0.000 description 2
- 229910001021 Ferroalloy Inorganic materials 0.000 description 1
- 108010038629 Molybdoferredoxin Proteins 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- HBELESVMOSDEOV-UHFFFAOYSA-N [Fe].[Mo] Chemical compound [Fe].[Mo] HBELESVMOSDEOV-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000005375 photometry Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/22—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by measuring secondary emission from the material
- G01N23/223—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by measuring secondary emission from the material by irradiating the sample with X-rays or gamma-rays and by measuring X-ray fluorescence
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/22—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by measuring secondary emission from the material
- G01N23/2202—Preparing specimens therefor
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Analysing Materials By The Use Of Radiation (AREA)
Abstract
The invention relates to a method for overcoming the particle size effect of alloy elements measured by an XRF powder tabletting method, which is used for preparing a standard sample and a sample to be analyzed with similar particle size composition, and respectively coarsely breaking, finely breaking, grinding, screening, grading and preparing the prepared standard sample and sample to be analyzed. The analysis was performed using an x-ray fluorescence spectrometer powder method. According to the invention, the granularity compositions of the standard sample and the sample to be analyzed are highly similar by redistributing the compositions of different granularities in the sample, so that errors caused by fluctuation of the strength of an analysis line due to granularity effect on a detection result are eliminated, and the granularity effect and the mineral effect of alloy elements measured by an alloy x-ray fluorescence spectrum analysis powder tabletting method are solved.
Description
Technical Field
The invention relates to the technical field of ferroalloy detection and analysis, in particular to a method for measuring the grain size effect of alloy elements by overcoming an XRF powder tabletting method.
Background
Iron alloys are alloying elements added in recent steelmaking processes, and aim to improve the alloying properties of steel. Because the alloy element and the iron atom coexist only through simple combination at high temperature in the manufacturing process of the iron alloy, the iron atom is easy to oxidize. Therefore, the finished product has oxidation phenomenon in the storage process and is not easy to store. The shorter the test period is, the better the test period is in the process of product acceptance inspection. The alloying elements in the iron alloy are usually measured by a wet analysis means such as a capacitance method or a photometry method. The related measurement method is complex, the process is complex, the required technical level of operators is high, and the analysis period is long.
In the actual detection process, the XRF powder tabletting method is always influenced by the granularity and uniformity of the sample. The influence of granularity and uniformity on the radiation intensity of an analysis line directly causes fluctuation on an analysis result. In the process of preparing a powder sample by vibration milling, the analyst cannot make the particle size composition of the milled sample exactly the same. Thus, the density, surface finish and particle size distribution composition of each prepared powder tablet sample are inconsistent. The analysis line intensity is greatly influenced, and analysis errors are caused. Early, many students tried to eliminate this effect by mathematical treatment, and had obtained satisfactory results, but the results were poor for samples with uneven particle size and component distribution. The iron alloy belongs to a sample with uneven granularity and ingredient distribution due to simple combination of alloy element atoms and iron atoms.
Disclosure of Invention
The invention aims to solve the technical problem of providing a method for overcoming the particle size effect of alloy elements measured by an XRF powder tabletting method, and the influence of uneven particle size and component distribution on a detection result is overcome.
In order to achieve the above purpose, the invention adopts the following technical scheme:
a method for overcoming the particle size effect of alloy elements measured by an XRF powder tabletting method is used for preparing a standard sample and a sample to be analyzed which have similar particle size compositions, and specifically comprises the following steps:
1) The standard sample and the sample to be analyzed are respectively coarsely broken: crushing the sample to less than 3-5mm by using a jaw crusher;
2) The standard sample and the sample to be analyzed are respectively broken finely: crushing the sample to less than 2mm by using a hammer crusher;
3) Standard samples and samples to be analyzed are respectively ground: grinding the sample by adopting an automatic grinder; the weight of the mixture is 50-100g; the grinding time is 300-500 seconds, and intermittent grinding is performed;
4) Standard sample and sample to be analyzed are respectively screened and classified, and the ground sample is screened intoGrade 4, respectively x 1 、x 2 、x 3 、x 4 ；
x 1 Particle size: x is more than or equal to 0.125mm 1 Particle size is less than 0.180mm;
x 2 particle size: x is more than or equal to 0.075mm 2 Particle size is less than 0.125mm;
x 3 particle size: x is more than or equal to 0.045mm 3 Particle size is less than 0.075mm;
x 4 particle size: x is x 4 Particle size is less than 0.045mm;
5) Preparing a standard sample and a sample to be analyzed
The standard sample and the sample to be analyzed are proportioned according to the same proportion, and the mass ratio is as follows: x is x 4 More than 60% of the total amount, the rest being x 1 ：x 2 ：x 3 =1: (1-2): (2-3) adding;
6) The analysis was performed using an x-ray fluorescence spectrometer powder method.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the granularity compositions of the standard sample and the sample to be analyzed are highly similar by redistributing the compositions of different granularities in the sample, so that errors caused by fluctuation of the strength of an analysis line due to granularity effect on a detection result are eliminated, and the granularity effect and the mineral effect of alloy elements measured by an alloy x-ray fluorescence spectrum analysis powder tabletting method are solved.
Compared with the common method, the standard deviation of the intensity fluctuation of the analysis line of the element to be detected is reduced by 90 percent. The accuracy of the detection result of the primary element and the secondary element in the alloy is improved, the analysis period is shortened to 1/10 of the original analysis period, and the detection efficiency is greatly improved.
Detailed Description
The invention is further illustrated by the following examples:
the following examples illustrate the invention in detail. These examples are merely illustrative of the best embodiments of the invention and do not limit the scope of the invention.
A method for overcoming the particle size effect of alloy elements measured by an XRF powder tabletting method is used for preparing a standard sample and a sample to be analyzed which have similar particle size compositions, and specifically comprises the following steps:
1) The standard sample and the sample to be analyzed are respectively coarsely broken: crushing the sample to less than 3-5mm by using a jaw crusher;
2) The standard sample and the sample to be analyzed are respectively broken finely: crushing the sample to less than 2mm by using a hammer crusher;
3) Standard samples and samples to be analyzed are respectively ground: grinding the sample by adopting an automatic grinder; the weight of the mixture is 50-100g; the grinding time is 50-500 seconds, and the intermittent grinding is performed;
4) The standard sample and the sample to be analyzed are respectively sieved and classified, wherein the ground sample is sieved to 4 grades and respectively x 1 、x 2 、x 3 、x 4 ；
x 1 Particle size: x is more than or equal to 0.125mm 1 Particle size is less than 0.180mm;
x 2 particle size: x is more than or equal to 0.075mm 2 Particle size is less than 0.125mm;
x 3 particle size: x is more than or equal to 0.045mm 3 Particle size is less than 0.075mm;
x 4 particle size: x is x 4 Particle size is less than 0.045mm;
5) Preparing a standard sample and a sample to be analyzed
The standard sample and the sample to be tested are proportioned according to the same proportion, and the mass ratio is as follows: x is x 4 More than or equal to 60% of the total amount, the rest being x 1 ：x 2 、：x 3 =1: (1-2): (2-3) adding;
6) The analysis was performed using an x-ray fluorescence spectrometer powder method. According to the element detection conditions recommended by the corresponding alloy x-ray fluorescence spectrum detection method, measuring the counting rate intensity (kcps) of the x-ray fluorescence spectrum line of the element to be detected of the standard sample, and drawing a unitary linear working curve according to the element analysis line counting rate intensity and the concentration of the element to be detected. Measuring the analysis line intensity of the unknown sample element and obtaining the concentration of the unknown sample element by using a reference standard curve.
Example 1
The detection method for determining the ferromolybdenum alloy element comprises the following steps:
1. sample preparation method
And respectively crushing the standard sample and the sample to be analyzed to be less than 5mm by using a jaw crusher. And crushing the sample to less than 2mm by using a hammer alloy crusher. Grinding by a timing type vibration mill. Taking a sample below 2mm, and putting the sample into a mortar, wherein the grinding time is 100 seconds.
The ground samples were sieved to 4 grades, x respectively 1 、x 2 、x 3 、x 4 ；
x 1 Particle size: x is more than or equal to 0.125mm 1 Particle size is less than 0.180mm;
x 2 particle size: x is more than or equal to 0.075mm 2 Particle size is less than 0.125mm;
x 3 particle size: x is more than or equal to 0.045mm 3 Particle size is less than 0.075mm;
x 4 particle size: x is x 4 Particle size is less than 0.045mm;
2. preparing a standard sample and an analysis sample
The proportion of the individual fractions of all standard samples and samples to be measured is controlled to be 10% to 20% to 60%.
The mass of each fraction was re-weighed to make up the sample to be measured, and mixed repeatedly for measurement, according to a sample of 50g total weight. Standard sample preparation:
100g of standard sample is recombined according to the sample preparation proportion,
the sample wafer is prepared by taking a boric acid bedding and an aluminum sample box as a support on a press, wherein the pressure gauge is 25 tons. Tabletting the standard sample and the sample to be tested according to a sample preparation method;
3. analysis method
The instrument detection conditions are shown in the table 1, the analysis conditions of molybdenum element are detected by a ferromolybdenum alloy X-ray fluorescence spectrometry, the analysis line intensity of the molybdenum element is detected, and a unitary linear working curve is established with the concentration of the molybdenum element.
Measuring the analysis line intensity of the unknown sample element and obtaining the concentration of the unknown sample element by using a reference standard curve.
TABLE 1 molybdenum-iron alloy X-ray fluorescence spectrometry for detecting analysis conditions of molybdenum element
4. Results
Table 2 test data
Example 2
The method for detecting the aluminum element in the aluminum alloy comprises the following steps:
1. sample preparation method
And respectively crushing the standard sample and the sample to be analyzed to be less than 5mm by using a jaw crusher. And crushing the sample to less than 2mm by using a hammer alloy crusher. Grinding by a timing type vibration mill. Taking a sample below 2mm, and putting the sample into a mortar, wherein the grinding time is 100 seconds.
The ground samples were sieved to 4 grades, x respectively 1 、x 2 、x 3 、x 4 ；
x 1 Particle size: x is more than or equal to 0.125mm 1 Particle size is less than 0.180mm;
x 2 particle size: x is more than or equal to 0.075mm 2 Particle size is less than 0.125mm;
x 3 particle size: x is more than or equal to 0.045mm 3 Particle size is less than 0.075mm;
x 4 particle size: x is x 4 Particle size is less than 0.045mm;
2. preparing a standard sample and an analysis sample
The proportion of the individual fractions of all standard samples and samples to be measured is controlled to be 10% to 20% to 60%.
The mass composition of each fraction was re-weighed according to a total weight of 60g of sample and the sample to be analyzed was repeatedly mixed for measurement.
100g of standard sample is recombined according to the sample preparation proportion,
the sample wafer is prepared by taking a boric acid bedding and an aluminum sample box as a support on a press, wherein the pressure gauge is 25 tons. Tabletting the standard sample and the sample to be tested according to a sample preparation method;
3. analysis method
The instrument detection conditions are shown in table 3, the aluminum element analysis conditions are detected by an aluminum alloy X-ray fluorescence spectrometry, the analysis line intensity of the aluminum element is detected, and a unitary linear working curve is established with the concentration of the aluminum element.
Measuring the analysis line intensity of the unknown sample element and obtaining the concentration of the unknown sample element by using a reference standard curve.
TABLE 3 detection of analysis conditions for aluminum element by X-ray fluorescence spectrometry of aluminum alloy
4. Results
Table 4 test data
Claims (1)
1. A method for overcoming the granularity effect of alloy elements measured by an XRF powder tabletting method is characterized in that the granularity compositions of a standard sample and a sample to be analyzed are highly similar by redistributing the compositions of different granularities in the sample, and the error caused by fluctuation of the strength of an analysis line due to the granularity effect is eliminated, and the method specifically comprises the following steps:
1) The standard sample and the sample to be analyzed are respectively coarsely broken: crushing the sample to less than 3-5mm;
2) The standard sample and the sample to be analyzed are respectively broken finely: crushing the sample to less than 2 mm;
3) Standard samples and samples to be analyzed are respectively ground: grinding the sample; the weight of the mixture is 50-100g; the grinding time is 300-500 seconds, and intermittent grinding is performed;
4) The standard sample and the sample to be analyzed are respectively sieved and classified, wherein the ground sample is sieved to 4 grades and respectively x 1 、x 2 、x 3 、x 4 ；
x 1 Particle size: x is more than or equal to 0.125mm 1 Particle size is less than 0.180mm;
x 2 particle size: x is more than or equal to 0.075mm 2 Particle size is less than 0.125mm;
x 3 particle size: x is more than or equal to 0.045mm 3 Particle size is less than 0.075mm;
x 4 particle size: x is x 4 Particle size is less than 0.045mm;
5) Preparing a standard sample and a sample to be analyzed
The standard sample and the sample to be analyzed are proportioned according to the same proportion, and the mass ratio is as follows: x is x 4 More than 60% of the total amount, the rest being x 1 ：x 2 ：x 3 =1: (1-2): (2-3) adding;
6) Analyzing by adopting an x-ray fluorescence spectrometer powder method; according to the element detection conditions recommended by the corresponding alloy x-ray fluorescence spectrum detection method, measuring the counting rate intensity of the x-ray fluorescence spectrum line of the element to be detected of the standard sample, drawing a unitary linear working curve according to the element analysis line counting rate intensity and the concentration of the element to be detected, measuring the analysis line intensity of the element of the unknown sample, and obtaining the element concentration of the unknown sample by using a reference standard curve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210017828.2A CN114371186B (en) | 2022-01-07 | 2022-01-07 | Method for overcoming particle size effect of alloy element measured by XRF powder tabletting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210017828.2A CN114371186B (en) | 2022-01-07 | 2022-01-07 | Method for overcoming particle size effect of alloy element measured by XRF powder tabletting method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114371186A CN114371186A (en) | 2022-04-19 |
| CN114371186B true CN114371186B (en) | 2024-03-19 |
Family
ID=81144524
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210017828.2A Active CN114371186B (en) | 2022-01-07 | 2022-01-07 | Method for overcoming particle size effect of alloy element measured by XRF powder tabletting method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114371186B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106153654A (en) * | 2015-03-28 | 2016-11-23 | 鞍钢股份有限公司 | Method for analyzing ludwigite by X-ray fluorescent powder tabletting method |
| CN110118792A (en) * | 2018-02-07 | 2019-08-13 | 腾达西北铁合金有限责任公司 | A kind of pressed powder method for making sample of ferroalloy productor and raw material |
-
2022
- 2022-01-07 CN CN202210017828.2A patent/CN114371186B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106153654A (en) * | 2015-03-28 | 2016-11-23 | 鞍钢股份有限公司 | Method for analyzing ludwigite by X-ray fluorescent powder tabletting method |
| CN110118792A (en) * | 2018-02-07 | 2019-08-13 | 腾达西北铁合金有限责任公司 | A kind of pressed powder method for making sample of ferroalloy productor and raw material |
Non-Patent Citations (2)
| Title |
|---|
| X射线荧光光谱法测定钨铁合金（粉末）中的钨、铁、硅、锰、铜;时军波;化学分析计量;第9卷(第4期);第20页 * |
| 粉末压片-能量色散Ｘ射线荧光光谱法分析硅铬合金中铬硅磷;豆卫全 等;冶金分析;第39卷(第9期);第54-58页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114371186A (en) | 2022-04-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102253068B (en) | Method for analyzing vanadium iron ingredients by melt smelting sampling-X-ray fluorescence spectrum process | |
| CN107340276B (en) | Method for rapidly determining contents of multiple elements in rare earth metal | |
| Gazulla et al. | Methodology for the determination of minor and trace elements in petroleum cokes by wavelength‐dispersive X‐ray fluorescence (WD‐XRF) | |
| CN103674985B (en) | A kind of accurately and reliably, silicon, sulfur, the detection method of P elements in simple and rapid steel-making exothermic mixture | |
| JP6755068B2 (en) | Quantitative analysis method for multi-component mixed cement and manufacturing control system for multi-component mixed cement | |
| CN108051467A (en) | A kind of method that X fluorescence spectrometer measures the primary and secondary quantitative elements in manganese ore | |
| Maltsev et al. | Characterization of archaeological ceramics from eastern Siberia by total-reflection X-ray fluorescence spectrometry and principal component analysis | |
| Cherkashina et al. | Determination of trace elements in calcium rich carbonate rocks by Wavelength Dispersive X-ray Fluorescence Spectrometry for environmental and geological studies | |
| CN101852735B (en) | Method for measuring titanium content of aluminum-titanium-boron alloy by using photoelectric direct reading emission spectrometer | |
| CN114371186B (en) | Method for overcoming particle size effect of alloy element measured by XRF powder tabletting method | |
| CN102279202A (en) | Method for measuring chemical compositions in molten iron of blast furnace by X-ray fluorescence spectrometry | |
| CN104267054A (en) | Method for analyzing main elements in geological sample by utilizing X-fluorescence spectrum | |
| CN109668871A (en) | The direct-reading spectrometer analysis method of trace amount Ti in a kind of steel | |
| CN106324006A (en) | Method for rapidly determining heavy metal element chromium in soil with X-ray fluorescent spectrometry | |
| CN101825588B (en) | Method for measuring contents of As and Sn elements in iron ore by adopting X-ray fluorescence spectrum melting method | |
| CN105606414A (en) | A set of wire spectrum standard samples and preparation method | |
| CN108195865A (en) | For the submerged arc welding flux standard sample and preparation method of X-ray fluorescence spectra analysis | |
| CN105547777A (en) | A preparing method of a pig iron standard sample | |
| Bumsted | Determination of Alpha-Quartz in the Respirable Portion of Airborne Participates by X-ray Diffraction | |
| CN101571499B (en) | Method for measuring elements to be measured of samples to be measured | |
| CN108037148A (en) | The development of x-ray fluorescence spectrometry Copper making clinker multielement standard sample | |
| CN107688036A (en) | The assay method of coal ash chemical composition | |
| Mzyk et al. | Special tablets containing cellulose binder and Sr internal standard for simplifying X-ray fluorescence analysis of powder samples | |
| Shan et al. | Mineralogical effect correction in wavelength dispersive X-ray florescence analysis of pressed powder pellets | |
| CN102590102A (en) | Standard sample for spectroscopic analysis of welding wire steel ER50-6 |
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 |