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EDX - Science topic
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Questions related to EDX
Recently I measured the sample: Si/SiO2(~300nm)/CuF2 (50 nm)/Au(~5nm).
I used INCA PentaFET -x3. It’s old but was serviced recently.
The information I want to extract is the Cu:F ratio. I noticed that when I use 10 kV I get a ratio of ~1:2, and for 5 kV, it’s ~1:1 (spectra were collected one after another on the same sample). I understand that with a higher acceleration voltage, I get deeper penetration. 10 kV beam reached the Si, while the 5 kV beam did not (Si : O ratio is ~1:2). But to me, it seems like the measurement done with 5 kV underestimates F (or overestimates Cu).
How does the software calculate the ratio?
What is the source of this difference?
📷

Hi,
I got an EDX measurement of relativly pure Aluminiumoxide impurities <0.05% so below the detection limit. I have a peak at 2 eV in addition to the expected energies. My guess is that it is a sum peak of photons from the Al at 1.5 and Oxigen at 0.5.
But how can I confirm my theory. And can someone explain to me when SUM peaks are happening and when they are not happening?
Thanks
Recently, we measured EDX/EDS of LaCrO3 crystals synthesized by hydrothermal method, and found that the characteristic energy for La and Cr are nearly the same for all of the noted energy levels. Could any one give some discussion on how the equiped software address this circumstance with a definite quantified analytic results?
Thank you in advance.

Hello everyone, I'm facing an issue with EDS software that prevents me from obtaining atomic or weight percentages for my scan. However, I do have access to the raw data, which shows intensity vs. energy with a few identifiable peaks. Could someone explain how I can use this plot to calculate the weight percentage of each element? I've already deconvoluted the peaks and identified the corresponding elements.
I examined a compound containing lithium ions, and it did not appear in the EDX examination
I want to know for doing EDX analysis to examine the elements present in the biomass, should I do the first pyrolysis or directly do the powder sample analysis? which one is the most favorable? please tell me.
In my research, I have included a TEM image of grade 91 steel with point EDS. How to reply this question: "You still need to provide analytical TEM/EDX elemental mapping?"
Analisei uma amostra sólida (em pó) em triplicata, para obter a composição elementar no EDX Shimadzu. O software me forneceu esse relatório (anexo) mas não estou sabendo interpretar.
Por exemplo: na parte quantitativa há elementos que não estão na parte qualitativa;
Na tabela quantitativa, o que são os demais valores além dos que estão em ppm?
Desde já, agradeço.

Anyone explain the EDX Spectra and Elemental composition (at. % and Wt. %) of the dopant and composite. Why do we need both percentages?
No one explains clearly in the research article.
Everyone said, at.% and wt. % table given inside the EDX spectra. But, no one explains.
The experimental values of atomic % and weight % are obtained by EDX spectroscopy.
How to calculate the Atomic and Weight percentage from EDX? Any formula to calculate the at.% and Wt. %?
I have obtained elemental percentages from EDX analysis, which include C, O, N, Fe, Al, Si, and Mg in varying proportions in my debris sample. I am interested in identifying the compounds present. Additionally, I have micrographs of the debris sample.
Hi
Why it is important to have (gold) coating on your biological (plant) samples before EDX analysis? If the sample is thin, well attached onto carbon tape and I do not see any charging on sample, may I perform EDX measurement without coating? How coating infulence mesurements and how it influence final report (= weight percentage of individual element in sample)? I mostly use gold for coating
Thank you
Jan
EDX provide weight % of elements present, while we need atomic wt % how to calculate?
Kindly explain, how to calculate the elemental composition of weight and atomic percentage from EDX. Does anyone know the formula to calculate the at% and Wt%?
Please see the attached pdf for the EDX scanning results. I would like to know whether the nanofiber in the SEM image contain silver.
Thank you.
BRs,
David
Why are other elements such as calcium, oxygen, sodium, magnesium, aluminum, silicon and molybdenum visible in the EDX spectrum of tapered optical fiber (SMF‐28) covered with palladium and copper by sputtering method? Do all these foreign elements like silicon belong to the optical fiber itself?

I did EDX for my nanoparticle samples. It contain peak for Cl, C, Na, O and Ag . What is the meaning of this peaks. Where does the other elements come from? Kindly provide the interpretation reference files.
I am looking for where I can carry out the following instrumentation analyses.
SEM with EDX (5um, 10um and 20um) for powdered samples
SEM with EDX (5um, 10um and 20um) for polished surface samples
XRD (Rietveld Mineralogical analyses) for powdered samples
Any credible suggestions or recommendations?
Thanks
Its about synthesized materials characterizations
How the EDX results significant with the stoichiometry? Please anyone explain this and provide the appropriate references?
Given wt% of Ru, Ti and O. Can we calculate wt% of RuO2 and TiO2 from the given EDX data?
Hello everyone,
I have a soil sample in which soil organic matter was stained. To find out how effective and specific the staining was, I want to map the spatial distribution of both organic matter and the staining agent. The idea is to do that with EDX measurements on a thin section of that sample.
The problem is that epoxy resin, which is typically used as the embedding material, is an organic substance itself. So, is there a possibility to differentiate between resin and soil organic matter using EDX measurements? Or would it be possible with any other chemical surface analysis? (I have never done any of these, so please talk like to a beginner on that area.)
As one idea, I read about adding a dye to the resin that is visible under UV light (doi:10.1016/j.geoderma.2012.02.023). Maybe something analogous is possible for EDX measurements?
Another idea, can one distinguish between them based on functional groups? Is EDX capable of measuring that?
Are there embedding substances that would be easily distinguishable from soil organic matter?
I am pretty sure someone has had this problem before, so I hope the solution is out there, too. Thanks in advance to the one(s) reporting it here.
How can we prepare our electrode to use SEM , DRX,EDX, FTIR,XPS and CV characterization?
We can use EDX to measure the silver concentration before and after leaching test to know amount of silver leached. However, the concentration of leached silver from membrane is measured using ug/L or mg/L with the aid of ICP-MS. How to measure the silver concentration before leaching test of membrane using ug/L or mg/L unit?
I am trying to calculate the percentage of retained austenite in Maraging steel through XRD analysis.
How can the chemical compositional % of each element present in the martensite and retained austenite be calculated in order to determine the amount of retained austenite using XRD? In addition, which one contains more iron (Fe): martensite or retained austenite?
ICP provides data for the entire alloy and not for the individual elemental composition of each phase. Can we utilize the EDX results to determine the composition of each individual phase, though?
I am a university student and I've been doing EDX analysis on some kanthal heating wires and one of them appears to have a huge amount of carbon in it (one reading said 20% the other said 25%), which is very unexpected and I cannot explain it (in the report I'm writing that's due tomorrow, and I don't have time to repeat the EDX analysis), apart from as contamination from a fingerprint (as I was a bit clumsy while preparing the sample for the SEM), does anyone with experience of EDX think contamination could leave such a high amount of carbon on the sample?
Dear researchers, in my EDX spectra there is peak of Al and Mo though I don't use any material related these elements peaks in my sample, I think it will be impurity peaks. but I performed the experiment very hygienically.
Some of the results of EDX analysis are quite scattered e.g. for Ca K: from about 3% to 27% at. They agree don't with the atomic composition of the compound. Any comment on it? Please answer
The peaks in EDS appears less then 20Kev
Quantification of EDX spectra of Al-based casting alloys it was found certain intensity of Zr (up to 0.7 wt. percent) whereas the chemical analysis showed only very little Zr content (0.05). EDX were performed using Talos 120 TEM. Any Zr-enriched precipitates were not observed. I am looking for an answer why Zr intercity appeared in the aluminium matrix whereas it can't be. Many thanks in advance
EDX show inadequate result: Mn 4.8% Fe 38.9% O 55.4%. that is not connecting with our formula of compound. Can EDX mix up the spectrums of Mn and Fe or it is a mistake from the synthesis?
Hi all,
I have a sample of ZSM-5, and i don't know the ratio of Si/Al. I want to calculate the ratio with the result of EDX/SEM. could you help me?
Bests,
Samira
How we can interpret the presence of Hf peak in EDX spectra of reference birch wood ? While I have not seen this peak before in wood samples.
It was not possible to identify lithium an nitrogen. What is the effect of the Be window in this case? Can this be explained with the K-Shell of nitrogen?
Is an EDX analysis of lithium nitrate possible? I have not been able to identify lithium nitrate. Are there any possible explanations for this? If possible, also cite literature sources.
My substrate is Magnesium, it was electroless "Ni-P" coated.
I went to another test facility for EDX test to verify the contents of the coating. A Pt coating was put on it prior to FESEM and EDX at the test centre. As a result, the EDX pattern showed Pt peaks when the findings were released. But only Nickel and Phosphorous were deposited on the substrate in my work.
SO should I just ignore the Pt content in the EDX results or not ?
Recently, I have deposited the LiF on silver foil and I have done both XPS and TEM/EDX of my sample. EDX shows no oxygen presence or any other impurity in the LiF sample. SO, Is it possible that oxygen we got from XPS measurement, does not segregate in grain boundary or phase boundary?
How many frames are needed to cover 1cm2 area with a 50-micron step?
Energy Dispersive X-Ray Diffraction (EDX)
What is the difference between EDX and EDS for caracterisation of nanoparticles.
Hello,
I am looking for traces of PTFE in the nickel plating on a steel sample. I have no prior experience with SEM technology. I have access to a JSM-IT100 SEM. Based on my research, it appears possible to determine the amount of PTFE present utilizing the machines EDS/EDX system? However I do not know how to go about this problem. Any help or direction is much appreciated.
Thanks
I have two powder materials in particle size about 30 Micro-meter, one consist of CuO and TiO2, and other of CuO and MgO. I received following results from EDS operator. My questions are:
1-Did you think the test penetrated the sample completely?
2- If so, how can I get the result on the surface for my case or what is minimum energy required for my elements ?
3- What are these red and green vertical lines?
4-In general, how can we interpret EDS spectrum?
Note: regarding carbon that appear in result the operator said me that its due to he used material consist of carbon to fix the sample in the device is this acceptable for publication or how can I deal with it ?
Thank in advance ,,


Hello,
I found a specail clay mineral in shale sample.
Backscattered SEM image and corresponding EDX spetrum of a argon-ion milled shale sample were attached. The caly mineral looks like rose-like authigenitc smectite in the SEM image. But since element k is present, it could be illite. It also could be a mixed-layer illite-smectite (I/S). Can anyone tell me what is the kind of the clay mineral?
Thanks for your help.
Chuanmin

Element Atomic% Wt%
O 50.2 19.79
Zn 49.8 80.21
Total 100 100
We are looking to characterize "fluorine flowers" on the surface of aluminum pads. Essentially characterizing contaminates present only on the surface of a homogenous material. So the poor surface sensitivity of EDX is a major limiting factor for us. This would be more of a monitoring effort, so getting relative values in comparison to a golden sample would be fine. Would you all have any techniques that might help, or papers that have addressed similar issues?
I already did TEM/EDX analysis. The results show K factor value, wt% and Atomic%.
How I convert the results by calibrating with ZAF standard.
Example:
Element K factor wt% Atomic%
O 1.455 8.83 14.53
Si 1.000 91.17 85.47
How deep can the x-ray penetrate through aluminum nitride (AlN) sample with an accelerating voltage of 10kV (EDX model : FEI Nova NanoSEM 450 SEM)?
I have gone through some threads, and I found, for example, an x-ray attenuation length calculator (https://henke.lbl.gov/optical_constants/atten2.html); it seems simple, but I did not know the parameters such as "Scan" what should I insert here. My questions are: is this reliable way, and how can I use it? Is there any other way or software?
Best wishes
I think it is of material API X-65

Can I detect a thin layer (a few dozen nanometers) of SiO2 on surface of silicon carbide wafer by EDX?
What are the possible characterization techniques to confirm the formation of a core-shell nanostructure except for TEM? How can we confirm it using EDX technique?
Hello, can anyone help me with interprétation of the quantity of lead in this sample

I want to know that TBO is used for the quantification of heparin on the PCL, Why?
Why can we not used FTIR or EDX?
I am using 2M NaOH solution for synthesis of zinc oxide nanoparticles, my EDX data is showing presence of Na and OH. How can I remove it completely? As I am washing it 6-10 times with distilled water and ethanol...but still there is presence of NaOH. Can anyone suggest how can I remove it?
Other elements include Ca, C. All elements are given in wt %.
Please help me understand the attached EDX spectra.
I'm not really familiar with this analytical technique and it is my first time to use EDX.
What is the difference between Element Wt% and Atom %?
And can EDX detect noble gases?

EDX - energy dispersive x ray
Dear expert colleagues, it is a well-known fact that SEM-EDX analyses give acceptable results from about Na on (i.e. no precision is expected for light elements as O, C, N, and so on). My questions are the following:
1. Let us assume that we have EDX atomic% data on a surface, containing C, O, and heavier elements. If the data on O and C are not precise, can we still trust the relative atomic % values of the heavier elements? Or we should treat the whole thing semiquantitatively? What about changes and tendencies? Are they reliable?
2. If we use wavelength dispersive analysis, do the atomic% values become reliable and comparable with those of the heavier elements?
3. How do EDX and WDX compositional data compare with XPS or XRF atomic% data? Can EDX and WDX data be used at all without model-matrix studies?
I would appreciate it if you could quote review articles on these aspects. So far I have tried to find some, but I did not find what I really looked for. It would be helpful to hear the opinion of colleagues who use these methods in their daily practice not only for elemental mapping but also for obtaining (semi)quantitative compositional data.
Thank you in advance
Most of the journal articles show that the plasmon peak of silver nanoparticles exists at the wavelength range of 400-500 nm. However, what I get is at around 550 nm (the AgNPs were synthesized through chemical reduction of silver nitrate by sodium borohydride with the presence of dodecylamine as capping agent). The formation of AgNPs has been confirmed by other elemental analysis (XRD,EDX). So I am not sure that does the peak presences at the wavelength of 550 nm is attributed to AgNPs or not?
Hello,
I have the data/results from XRD and EDX. The EDX data shows chemical %age, e.g. SiO2: 73.653 % , Al2O3:14.426 % and other etc including some other details. The XRD results include, peak data Chart (2θ vs I unit cps); 2θ, d and counts table and peak %ages etc.
what is the procedure to calculate the minerals %age, specifically, quartz and montmorillonite and other minerals. Please try to have a simple and concise answer/procedure. If you have a flow chart or outlined procedure or an example data, would be much helpful.
Thank you.
Using Si substrate as base material for ITO samples, after EDX analysis ,not only the samples compositions or content increased or decreased, the Si (as base material) content as well also increased, why?
Dear colleagues,
I am a researcher working with bovine hydroxyapatite. I want to reduce the percentage of carbonate on the sample. Is there any suggested techniques for this? I am measured the carbonate from EDX (SEM-EDX). Thank you
Thank you.
i. Scanning electron microscope (SEM) coupled with energy dispersive X-ray (EDX).
ii. X-ray photoelectron spectroscopy (XPS).
iii. X-ray diffractometer (XRD).
iv. Fourier transform infrared (FTIR)
Is the signal too noisy? Energy too low? Are all TEM EDX detectors above the sample? There are detectors of electrons below but no EDX. I just wonder why this is.
We're trying to get to the stoichiometry of bacterial cells through EDX combined with SEM or TEM. Which kind of grids do you think is the best for our sediment freshwater bacterial cells?
Thank you very much!
I've synthesized 45S5 bioglass by sol-gel method and my XRD and FTIR results are similar to 45S5 bioglass but my EDX result has differences and instead of Si and Na the amount of Ca is higher. Could you please tell me what is wrong with that?
I have electrodeposited Co, Ni and Cu oxide on FTO glass substrate from equimolar conc. bath and EDX data obtained is attached here. Kindly guide how can I calculate the composition of my oxides?
Note: XPS confirmed +2 oxidation state of metals.
I am wondering why there is a variation in the theoretical atomic percentage in Ni-Cu ferrites and the percentage atom values found from EDX spectra. In the case of Fe and O, there exists this difference for all of my samples. If it exists the same after the second or third trial from EDX spectra, how can I explain the reason for this discrepancy in the literature? Would you please provide your explanation with references? As I saw from the literature, people usually do not talk about the difference in calculated and observed values of atomic percentage, rather they find whether all elements are present in the spectra and the total should give 100 % atom.
Thank you in advance.
I have taken EDX of a ceramic compound and It has shown all the expected elements along with different weight and atom percentage. But in XRD data of the same compound, all the elements have not been observed in a crystal. How I can sure which compound is developed?
I fabricated a composite say AB and both are carbides ceramics having formula AC and BC. I did EDX point analysis and observed A (45 wt %) and B (28 wt %), Carbon (26 wt %) and Oxygen (1 wt %). Can this data confirms the formation of A rich (A, B) C solid solution? Also at one location I got Carbon (83 wt % ), Oxygen (16 wt %), A (1.62 %) and B (0.13 %). Does that means precipitation of carbon at grain boundaries ? In EDS elemental mapping for some composition both element A and B mapping are superimposing at most of the places. Does it means formation of a intermetallic compound AB or it may be (A, B) C solid solution ?
I am working on 2D nanosheets. During the SEM-EDX and XPS analysis, I got too much difference in atomic percentage.