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TGA - Science topic
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Questions related to TGA
In chalcogenide glasses, the mass loss observed during thermogravimetric analysis (TGA) is attributed to processes such as thermal decomposition, degradation, evaporation, and volatilization. Which term is the most appropriate to accurately describe this mass loss phenomenon, and could you provide supporting references for the recommendation?
I have determined the activation energy of XLPE material using TGA by iso-conversional method (KAS) at conversion of 5-10% . But now it is very doubtful which value of Ea should be used. Moreover in the formula of ASTM-1877 the doyle approximation value is also troubling.
logt= (2.303/RT + log E/R*heating rate) - a
R= general gas constant
T= Absolute temperature
t= failure time
a= doyle approximation (E/RT)
See the attached file for calculation. I came out with wrong results. Kindly give your suggestion in this regard.
The phenomenon of various amino acids (AA) adsorption onto the silica surface is widely studied. Many people simply add silica into a solution of AA, stir it, centrifuge it, and wash the solid with either 50/50 EtOH/water or pure ethanol, dry it and eventually analyze by FTIR (to see the chemical bond shifting if AA is adsorbed) or TGA (to determine the amount of AA adsorbed).
What I don't understand here is the washing procedure. From what I know, AAs adsorb onto silica surface via hydrogen bonding (I don't think the interaction is covalent) and AAs are highly soluble in water, even in the condition of 50/50 ethanol/water. So, if the supernatant is discarded and you wash the solid with 50/50 EtOH/water, wouldn't you actually wash off these AA that are already adsorbed onto the surface?
Back to my main question, I am grinding silica with AA using a ball mill and also want to determine the adsorption of AA onto silica. In my case, because everything is done in the solid state, how can I proceed from this point? Should I just transfer the powder onto a filter and wash with 50/50 ethanol/water and dry them for the FTIR and TGA analysis? Can this sufficiently remove free AAs that are not adsorbed onto the silica while keeping those adsorbed intact?
Hi, I have an inquiry concerning the carbon concentration of my material.
I synthesized carbon-coated LiFePO₄ and NaCrO₂ materials as cathode materials for Li-ion and Na-ion batteries, respectively. I conducted an investigation with EA and SEM-EDS; however, I could not achieve consistent results. I did an analysis of TGA for NaCrO₂, but it was not replicated. Can somebody propose a solution for this issue?
Thank you...
Dear Researchers, I recently went through my DTA analysis for my sample. In that, I found the sample weight is increasing with temperature increase. I never found like that graph in any literature. How do I understand the data? Can heat flow with a temperature graph be useful?
What can we calculate using TGA data?
Is it possible to calculate the glass transition temperature?
Please guide
Thanks in advance
I have conducted a TGA analysis of polyurethane foam and defined the steps of degradation as follows. Since the steps of degradation are not pronounced, I am not exactly sure about the steps defined. Any and all feedback will be appreciated.

I have trouble interpreting the DSC/TGA diagram. I have 2 samples (an amino acid and a dipeptide). Both of them were heated from 30 to 360C at 4K/min with nitrogen as a purge gas.
For the compound that has some weird peaks at 30 mins, I did PXRD and found that it was a change in the crystal structure. However, for both compound, it seems that their melting point peak always appear when there is weight loss. Does this mean both compound just don't have a melting point but always decompose right away when they reaches a certain temperature?


I've test TGA and plotted that, but the result of weight loss didnt start from 100, why this is happen? And how can i compare this with other variable??

Hello everyone. I am currently working with Oleylammine-capped Gold, Silver and Platinum Nanoparticles. I need to determine which of the abovementioned nanoparticles have a higher Oleylammine degree of coating.
I considered performing TGA measurements on each sample to determine which sample gives the higher weight loss, which should be related to the Oleylammine degradation, and relate this to the presence of more or less Oleylammine on the nanoparticle surface.
Do you have any suggestions? Can this method give me the information I am looking for? How do we treat the data? Do you have any literature to recommend?
It`s my first time using this technique, so also some literature on similar studies would be appreciated.
Need professional paper discussing how to get the decomposition temperature of Strontium carbonate by TGA.
I have different polymer solutions and I hypothesize that water molecules are retained based on the water-polymer interactions, so the amount of free water is less to intercat with drug tablet.
To validate I tried to find the water evaporation rate from each polymer solution from TGA.
But I see variation due to its high dependence in initial mass.
So now I think to find the Activation energy of water evaporation process. want to know whetehr this is correct, or whetehr there are better ways to prove my hypothesis. May be DSC?
Since BET and TGA both are very costly instruments and many places the facilities are not available (for large number of samples) hence a threshold degassing temperature and time is preferable
I read about converting the y-axis from mass loss to the degree of conversion, using (100 - x)%. However, if the thermogravimetric analysis (TGA) shows residual char, such as when there’s a 27% mass loss remaining, should the formula for conversion (α) be adjusted? Specifically, should it be (100 - mass loss) / (100 - minimum mass loss) instead of the standard equation?
I have also attached TGA and DSC analysis of biosynthesised nanomaterial.

Usually TGA is performed either with Nitrogen or air which are purged through the system. Can this analysis be performed without using any of these purged gases? Also for air (80/20) is set by default in the instrument, what is this? Is it 80% other gases and 20% oxygen or something else?
I analyzed cement samples exposed and unexposed to moisture over various periods. The TGA results of these samples showed variation with each repetition. However, I consistently used calcium oxalate as a reference material, and the results were satisfactory. The TG analysis employed an 80:20 helium-to-oxygen gas mixture and was connected to a mass spectrometer.
Can I ask somone to helpe me regarding interpretation of this TGA graph?

Hello
I'm using COMSOL 6.1 Reaction engineering module. I'm modeling a reaction in the form of :
A-->B+C+D+... the reaction describes the thermal decomposition of a solid material. I got the values of the reaction kinetics [ A, E] from TGA experiments. when I use the values to define the reaction constant [k] the reaction doesn't occur . I get a graph with the concentration of [A] as a fixed straight line and all products are at zero.
has any one modeled reactions using kinetic values of TGA data before?! pls help
- I also want my reaction rate to be temperature dependent. my temperature is rising from 0K to 800K and then stays at that point. I tried to identify temperature as a function but I couldn't include the function in the rate constant. COMSOL wont recognize it. If anyone has such success modeling these type of scenarios. I would be grateful to hear you thoughts.
Best Regards
I have to calculate the carbon content present in the catalyst from the TGA plot. Does anybody have an idea?
Dear all,
After checking DSC and TGA analysis for ZIF-8 samples, it was possible to observe an endotermic peak at around 50ºC, using DSC under N2, and a weight loss in TGA at around 38ºC and 125ºC using He gas. It was checked that there was no impurities in the sample analyzed ( ZIF-8). Is is possible at those low temperatures to eliminate gas/ water trapped, or you suggest another process?.
Thanks in advance for your response/clarification
Kind regards
Rosa M Huertas
I was infomed by my colleagues that conducting TGA analysis is not the best option for my material ( spent catalyst with 1% coke ). They informed me to conduct instead TPO and convert the results to conversion based Gas analyzer results. So I was wondering if this approach is possible ?
I am doing calculations to determine activation energy using TGA data. I noticed that there are four to five regions or phases in TGA and 1st derivative of TGA. Now, I am doing the calculations to find all the kinetic parameters using Coats- Redfern method for all the five regions. So, when doing this there is a term alpha is introduce which further includes final weight of the sample. I am confused with this final weight term, is this different for different region or same for all five.
I experimented multiple times in the presence of proper nitrogen flow and still got the same results.
can i determine the degree of amination using TGA?
i have copolymer and make modification on it using amine to insert amino groups
if i have the TGA of the copolymer and aminated copolymer
how can i determine the degree of amination ?
the polymer is cellulose grafted with PAN.. cyano groups of PAN will convert to amine .
thanks..
I am investigating the thermal analysis of a clay by TGA using nitrogen gas and at the end the curve is going up. Can anyone give me a plausible explanation of that behavior? Or what do you advice? Thank you in advance

I need to understand TGA graphs; can you help me with where to start?
I'm working with TGA (Thermogravimetric analysis) + DTA (Differential thermal analysis) of milk proteins on a STA2500 Regulus equipment by Netzch. I have two standards: one of B-Lactoglobulin and the other one of a-lactalbumin. I've worked with quite a few combinations of heat flow and sample size (mg) looking to obtain high quality thermograms (e.g. 10°K/min and 8 mg of sample, 8°K/min and 8 mg of sample, etc...).
In all cases, I'm obtaining a melting temperature (endothermic peak) for both samples at 72-73°C. This temperature would perhaps make sense for B-Lactoglobulin, but for a-lactalbumin temperatures in the order of 60-65°C have been reported. Furthermore, the thermogram for the two samples is practically the same.
Are there any suggestions on possible things I could be doing wrong?
Thanks in advance for your support.
hello, pls help me to calculate the conversion degree of pyrolysis from TGA data?
Is there a relationship between phpzc and TGA analysis?
I need to perform TGA analysis of Prussian blue (till 400 degrees). The atmosphere would be N2. I would like to know if -CN gas is released at any particular temperature below 400 degrees.
Thanks in advance
Can any expert help in solving the DSC peaks along with the TGA curves of a compound? Earlier, some experts suggested me to run a TGA when I put up the DSC curve in aprevious question. So here is the TGA along with DSC. Any experts' advice is grateful.

I have prepared heat-treated material at different temperatures and expected that the following reactions/conversions take place:
CaCO3 + (heat) converted into CaO + CO2
CaO+ H2O converted into Ca (OH)2
I have attached the TGA graphs below. Please guide me if I am missing something. Waiting for a kind response.
Dear All,
Recently, I encountered a problem while plotting graphs for iso-conversional methods to evaluate the thermal behavior of biomaterials in an inert environment. I was able to see that at a particular value of conversion (alpha), with an increase in heating rate (5,10,15,200C /min), the corresponding T (alpha) is not changing or getting reduced. Prior to analysis, the TGA data was refined by data smoothing . Do I need to cover the alumina crucible with a lid while conducting TGA analysis or do I need to modify anything related to same. Kindly help me regard to this
How can one determine the Degree of Reaction (DOR) using Thermogravimetric Analysis (TGA)? In modern times, blended mixes with various Supplementary Cementitious Materials (SCMs) are common, necessitating a thorough grasp of their reaction mechanisms. If anyone possesses knowledge or relevant literature on how to ascertain DOR from TGA as a part of understanding these mechanisms, please feel free to share your insights.
In TGA analysis, 0.5 to 0.8% weight gain in case of plastic sample at initial temperature. please let me know the reason behind this if any one knows. Thank you
I did TGA of a LiFePO4 (LFP) sample and obtained a 3% of weight increase (heating rate of 10ºC/min till 700ºC and cooling down at 10ºC/min). I repeated the analysis several times, both in argon and in N2 atmosphere and using different equipment. I have also done the analysis circulating N2 at room temperature for one hour to remove possible O2 adsorbed on the LFP. I know my LFP is oxidizing during the analysis, but I still don't understand how I can have an increase in weight. Any ideas?
Thanks!!
Could anyone tell how can the TGA (Thermogravimetric analysis) be used to reverse engineer a product?
I studied decomposition of a cellulose in TGA. At a particular time, the %wt increased to 200% and then decreased rapidly to a negative wt%. Then it remains constant. The maximum temperature during this process was 300 degree celsius. The cellulose is a modified cellulose. The whole process was carried out under N2. The material expanded in size was black
I am going to find the thermal properties of polymer nanocomposite. For that, I have planned to conduct THERMOGRAVIMETRIC ANALYSIS(TGA). Now, my question is, can I get DTG curve from TGA curve?
what is pros and cons of using Isothermal and Nonisothermal TGA testing
I have bio-synthesized RuO2 nanoparticles at room temperature. TGA and DSC graphs are attached.


how much amount of CNTs needed for SEM, EDS, XRD, FTIR, TGA? how to find out purity of CNTs using TGA?
How can I calculate the percentage of iron conjugated on graphene oxide using TGA graph?
The purity (%) percentage. I have the DDA value, XRD, FTIR, Tg, TGA, and SEM. If any one can please help me.
I have synthesized carbon coated material. however when I performed TGA, there is weight gain in my bare sample and weight loss in carbon coated sample?
I have results from TGA of RDF samples, And I need to simulate the experiment.
Is it possible to use CFD?
I need to show the concentration of the result gases and mass yield of the sample.
Did some research and didn't find much results on solid waste and RDF TGA modelling
The silica was prepared from biomass and underwent multiple pretreatment. Other samples prepared by different pre-treatment under oxygen-air atm. did not show weight gain. Intrigued by the results. Could anyone help me with this?
Attached is a typical graph generated by the TGA analyzer. It is known that the degassed temperature for a solid sample can be determined by identifying a point known as the "melting" point of the solid material.
Now, referring to the attached graph, the question is: How can one determine the degassed temperature by obtaining the "melting" point of the solid material from the TGA graph? Which point is it? Point A? Point B? or Point C?
Your feedback will be highly appreciated. Thank you very much.
Photo Source: Qubeissi, M. A. , & El-kharouf, A. , & Soyhan, H. S. , (Eds.). (2020). Renewable Energy - Resources, Challenges, and Applications. IntechOpen. https://doi.org/10.5772/intechopen.81765

Or what is the difference between TGA and melting point?
The thermogravimetric analysis aims to give % mass change with increasing temperature over the time period while proximate analysis gives moisture, ash, volatile matter and fixed carbon contents by measuring the % weight change in biomass at a known temperature in particular time.
So, is it possible to obtain the data for proximate properties with TGA graphs only?
We performed a few TGA measurements on MOFs and faced severe contamination of crucibles at the end of the tests. Please let us know an effective cleaning procedure to follow. We tried Aqua regia and it could not effectively clean the crucibles. Earlier we faced similar issues when we ran graphene oxide.


Seeking clearcut explanation regarding ORF(Open reading frame) and Exon. Some of the authors defination are complication. Like some says ORF is a stretch of DNA having Start codon at one and stop codon at another end. While some says ORF is just a coding DNA present withing start codon (AUG) and Stop codon (TAG, TAA, or TGA). All these make complication in my overthinking brain. Then what about Exon and Intron? Coding DNA...
Hi guys,
Imagine we have hybrid carbon/glass fibre composites. As I know the sample size is too small for TGA experiment. Do you think the small size of the samples can represent the properties of the whole composite? I appreciate it if you can share your understanding here.
Thank you.
I read papers calculating based on weigh loss difference by TGA before and after surface modification. However, I found another paper (doi:10.1016/j.eurpolymj.2006.10.021) can calculate based on TGA only after surface modification. In this case they require few more values such as density and the radius of the nanoparticle.
[The equation is also given as the Image]
No of molecules per nm2 = [Weight loss * density of NP * radius of NP * 6.022^23] / [Molecular weight of surfactant (1-Weight loss) * 3*10^21]
Given that
Weight loss = 32.7 %
density of MNP = 5.1 g/ml
nanoparticle size (probably diameter)= 9 nm
Molecular weight of surfactant = 282.47 g/mol
The result they showed is 6.3 molcules per nm2
Is it true?
Sorry for the noob post; I am on an undergrad project and still learning.
We are degrading complex organic chemicals (mostly carbon-oxygen bonds) with a photocatalyst. Here is my plan to detect chemical bond braking. I also want to do the simplest Two main this is to cost of detection, the detection limit of each characterization procedure, and qualitative vs. quantitative.
First, we are doing is UV-vis of the liquid as our initial material is UV-vis active. We have found the broadening of the pick and a visible color change of the complex chemical.
Next, I intend to do TGA as of the produced chemical, parent chemical, and spent chemical after vacuum drying them.
As the chemical is produced in a water medium, it is hard to do FTIR, but I intend to do vacuum dry and check their FTIR (assuming the volatility of the produced chemical is much less than water)
After that, I intend to do HPLC of the contracted solution with probably a P column as the organic contains some benzine.
The main problem would be the chemical; if I am making any would be hard to detect, so I plan to consolidate them through distillation and chromatographic column.
I am worried that I will only be able to do NMR with solvent transformation.
I am searching but got a good one. Table -1
I am studying the thermal stability of graphene oxide-palladium hybrids by TGA studies on air and I have realized that the loss concerning the graphitic lattice is splitted in three parts: one combusting at a lower temperature in comparison to pristine GO, other one combusting at higher temperature and the final and most intriguing part above 800 C. Could you give me advice to explain the possible phenomena involved in this complex decomposition pattern, specifically the most high-temperature resistant part, please? Here I attach one example of my graphics. Thank you.

I am running TGA/DTG analysis on a sample of wastes to quantify the amount of calcite in it. In the literature I see that calcite decomposition occurs at T greater than 500 C, but occurs as a single event as evident from a constant slope of the TGA curve (Weight vs T) between 500 and 800 C and a single peak in the DTG curve. On one of my samples I witnessed that there are two events as shown from two peaks at that particular range and from the TGA curve I can clearly see that the slope of the curve changes in that particular range. Does this necessarily mean that there are two different minerals or could the same mineral display more than a single weight loss event?
Thanks
Faisal
Hello,
TGA curves of my biochar and magnetic biochar products that I produced with walnut, rose and sawdust are attached.
I observe a sudden mass loss of 2-3% at the temperature point of 750 degrees throughout.
In my literature review, I could not find a reason to explain this loss.
What could be the reason for this mass loss observed in all of them at the same temperature and in the same amount?
thank you so much.

We were working on glass based material on TGA test and found that there is a glass film inside the crucible and i don't know how to clean it
I recently did the TGA of polypropylene and polylactic acid separately. For both, there was a residual mass of 6% and 1% respectively. For PBAT/PLA mixture, the residual mass was more than 20%. What is residual mass?
water until 400oC in TGA is not accurate
I've done a TGA analysis on mesoporous silica nanoparticles. Despite previous works in our group in which samples were pre-treated with oven and lost their moisture and absorbed solvents, I've used desiccator. The results show higher moisture and around 18% weight loss is observed. So my question is do I have to repeat the test before publishing the results because of the great amount of moisture? do you think it could have influence on the resulting data or no? and is it even possible to use oven before TGA even though it is a thermo-related test?
I am reviewing some TGA analysis papers in which a sample is decomposing. The values for the DTG curve appear positive, although from the TGA curve a weight loss is evident. Is it possible that the software is reflecting the sign so the graph is more readable?
Thanks
I am looking for a way to control the moisture content of the gas which I am sending to TGA for study of oxidation of some metals and alloys.
I got the mass lost data and temperature already, but the lab assistant did not take the same amount of samples, so the curves don't start from the same origin which difficult to compare them. Now, I want to change the data of mass to weight percentage.
thank you
in ionic liquids when i test it with TGA analysis under N2 gas at 500 C the weight loss % was not logical (more than 100%) =108 % ؟؟؟؟

I want to analyze the thermal degradation phenomena for 3 different samples using TGA. One of these samples comprises Polymer only, while the other two are loaded with two different percentages of fillers. Should the test weight of all three samples be the same prior to TGA, or degradation trends would hold regardless of differences in the three initial sample weights?
To functionalize the carbon nanotube, I first mixed it in 3 m nitric acid at 60 °C for 15 min. Then I kept it in an ultrasonic bath for 2 hours. After drying, I repeated the same process using hydrogen peroxide. But But the degradation in the TGA analysis was minimal. What would be the reason. or how can i increase the binding of functional groups. Thank you
I will be performing BET analysis for my Biochar and activated Biochar samples. I wanted to know the degassing time and temperature and how does it affect the surface area. Does degassing temperature is determined using TG analysis?
This is Tadele Asswefa Aragaw, Lecturer and researcher from the Chemical Engineering Department, Bahir Dar University. From our research-grade labratory, we have a TGA instrument with a model: ATAT 2012 and software to this instrument is BJHENVEN. Unfortunately, the TGA software has been failed. Could you help me, please?
Thank You for your cooperation
Okay, this is embarassing, but is there a way to correct the TGA and DSC output data for the experiment where the masses of crucible and sample were placed wrongly?
The pre-experiment input(incorrect)
m (ref cr) = 282.390 mg
m (sam cr) = 20.681 mg
m (sam) = 270.023 mg
those should in fact be:
m (ref cr) = 282.390 mg (correct)
m (sam cr) = 270.023 mg (correct)
m (sam) = 20.681 mg (correct)
I have a list of output data from TG and DSC analyses. How they can be corrected?
For DSC I believe that (mW/mg) can be just multiplied by 270.023 and then divided by 20.681 to obtain correct values...
For TG data in mass loss % I am not that sure...should 270.023 or 270.023+20.681 be used for correction? or how else? I really do not have access for the setup to repeat this experiment unfortunately...
I am working on the drying of Faecal Sludge and I am using a thermogravimetric analyzer (ELTRA THERMOSTEP TGA) to study the drying kinetics. The sample size used was 1g as the ELTRA TGA makes use of a nominal sample size of 1-5g. The drying test was isothermal and done at 105C; samples were heated at 20C/min to 105C. I want to ascertain if my drying rate curve is correct as the rising rate period occured for about 25min. Attached is a document containing the drying curves and the drying rate curves.
Thank you
I am working on drying of Faecal sludge and I am using a thermogravimetric analyzer (ELTRA THERMOSTEP TGA) to study it's drying kinetics. The sample weight used was 1g as the nominal sample weight for an ELTRA THERMOSTEP TGA is 1g-5g. Isothermal drying was carried out at 105C; sample was heated at 20C/min to 105C. I want to ascertain if the drying rate curve obtained is correct as the rising rate period occured for about 25min. Attached is a document showing the drying curve and the drying rate curve.
Thank you
Good day.
I've modified surface of my clay sample with iron. After the process my samples LOI in XRF analysis increased from 6.73% to 18.73%. Later, i've performed TGA analysis for this sample but weight loss was around 6%.
Can anyone please tell me that which one (LOI or TGA) is a more accurate indicator for the sample's thermal stability? And why the difference between two results are so high?
Thanks in advance.
I'm evaluating activation energy of a sample using Friedman method. So, experiments were performed using TGA at four different heating rates 5-10-20-50 °C.min-1. Unfortunately i'm little bit confuse in designing program in MS Excel for the data processing. Exactly, how can i use the friedman equation 📷 to calculate activation energy from TGA data in Microsoft Excel?
I need to analysis water/moisture content in isopropyl alcohol. Can we use DSC/TGA to do this?
I have limited amount of sample, able to spare maximum 500mg sample for analysis
In TGA of polymers, initial small weight loss (10%) is due to moisture. No matter what I do to avoid moisture, the loss is still there. How to get rid of it?
I have done heating the sample in an oven for prolonged periods followed by placing it ( polymer sample inside the ziplock airtight bag) in a vacuum desiccator with silica gel.
I am trying to determine molecular formula of my Prussian blue analogue from experimental data. I have TGA data which gives me the amount of water and I have ICP data which gives me K/Fe . So assuming my compund is KFe[Fe(CN)6] . xH2O (without any vacancies), how would I find the molecular formula of my material? Unfortunately I dont have mossbauer data to find the amount of vacancies.
I have seen in literature GO at 600 C getting only 40 to 50 weight loss.but in my case at 220 C wt loss is zero. Why??
I am looking for studies that investigate the effect of electrospinning parameters (solution and process parameters) on the thermal stability of nanofibers. Generally, the effect of nanofiller concentration on the degradation temperature was studied and TGA analysis was not applied for investigating the effect of process parameters on the weight change and degradation temperature.
UV visible spectroacopy
FTIR spectroscopy
Thermogravitimetry (TGA)
Prorammable furnace 2500 temp
Magnetic hot plate stirrer
Vibrating sample magnetometer
Electric properties like IV, capacitance, dielectric, ferrowelectric, ect.
Mechanical properties of thin film , powder, etc
HRSEM
AFM
HRTEM
Spin coater
Ball milling
Vaccum chamber
Atmosphere furnace
Annealing furnace
Vacuum coating unit
Incubator
Oven for lab
Film thickness measurements
Edax
Xrf
Xrd/ hrxrd/ gixrd/ gaxrd
Raman for powder, liquid, film
Energy Dispersive X Ray Analysis (EDX) – elemental analysis
X Ray Photoelectron Spectroscopy (XPS).
Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES) – accurate (bulk) determination of specified elements
ICP-Mass Spectrometry (ICP-MS) –simultaneous semi quantitative determination of 70+ elements
Oxidative combustion / Thermo Gravimetric Analysis (TGA).
Our recent article "On the thermogravimetric analysis of polymers: Polyethylene oxide powder and nanofibers" includes a (new) equation that can be used to model the thermal degradation of polymers and eventually to calculate the activation's energy.
You are encouraged to use this equation to fit your experimental data (for example by using Origin Pro). We would like to understand if this equation may be used in a general manner or if the equation has solely a narrow breath.
Please also observe that our previous article on the TGA of iPP-VGCNF nanocomposites contains embedded within its content a simple method to estimate the polymer-nanofiller interface thickness (as order of magnitude)!
We will appreciate your feedback.
Is there any way to determine the composition of biomass using thermogravimetry? I've tried DTG curve deconvolution using Origin software but was not able to get the correct composition. Can anyone please help with how to do this?
Thanks & Regards,
Hari Kiran
We have imidazole ring N and Imine N for coordinating to metal in 2:1 (L:M) ratio. Both are forming coordinate bind with metal. So two covalent bond is from 2 O atom of acetate group. And the complex found be 6 coordinated in this case? Is there any possibility for this. How can we confirm the structure from IR and TGA for this acetate groups?
We are looking at purchase of several new analytical instruments. What would be the best things to look for in our search. We are a very small undergraduate chemistry program. Our primary use for the instruments would be teaching with research secondary - so less of a "black box" approach is better and massive through-put is not necessary. Thoughts? [Instruments under consideration: IC, TGA, XRF. We already have ICP-AES, AA, HPLC-UV, GC/MS, LC/MS/MS, DSC, IR, (small) NMR.]
I have tried to quaternise P4VP and the mass residue increases from 0 to 12% at 750oC. I have tried to quaternise by chloroacetamide and confirmed it through FTIR and NMR
I have prepared coordination complex, and I know the theoretical chemical formulate concluded from the reaction. I am looking for the empirical chemical formulate of my complex, I can't perform elementary analysis in my lab but I can perform TGA experiment. thus, I am looking for a method that allows me determine the number of ligands surrounding my metal.
Is there any facilities in India or abroad where TGA/DSC analysis is done for starch film or biodiesel?
I have synthesized cuprous oxide nanoparticles by wet chemical synthesis method. It is actually not stable and it changes its phase to cupric oxide. So I have given an antioxidant treatment to this cuprous oxide. Now I want to check it's thermal stability. I have seen on Research Gate that TGA can be helpful. But I don't know what parameters should I calculate from TGA data to show that my material is stable. Also what atmosphere should be opted for TGA.? There are options of N2, O2 atmosphere. Which one will be suitable for my material?
As far as I know, the TGA results should show decreases in weight but my spent catalyst (Ni/ZrO2-SiO2) weight increased.
I know weight gain should only happen if the samples react with the atmosphere: oxidize. But then the graph shows a straight line (100%) until 400-500 ˚C and then it started to increase. No decreases at all.
I suspect that the instrument needs proper calibration. But then, only for spent catalyst have this problem. All the fresh catalysts showed a standard result in which the weight decreases. So I don't think it's the instrument's fault.
Can quartz wool or glass wool increases in weight when temperature increases?
I suspect probably a tiny bit of quartz/glass wool was mixed with the catalyst.
The conditions that I used were 30˚C to 800˚C with a heating rate of 10˚C /min and used air as the carrier gas.
Is the temperature at which the mixture is debinded lower than the temperature at which each additive is debinded when TGA is measured?
If you know the answer, please give me a paper.
I have Rice Husk biomass and want to get the CHNS composition without using CHNS Analyzer. Are there any other ways without using a CHNS analyzer to get the CHNS composition like TGA?
Thank you.
Please see the attached image. With increasing temperature it is show the gaining weight..
