How i found functional group if it is not in the IR table ?

Is stone a sustainable material? Is it a sustainable approach to use natural stone waste in architecture?

I'm designing a zero-waste restaurant and considering using marble waste to make some tables and a bar countertop. My clients think it's not "sustainable enough" and I would like to have more...

01 March 2021 4,326 7 View

How the values of errors can be calculated for thermodynamic data?

I have calculated thermodynamic parameters for surfactant solutions in aqueous and mixed alcoholic solvents. I want to calculate the value of errors in the data and represent it in the table along...

22 February 2021 239 2 View

How can I simulate the optical absorption spectrum of a biomaterial (like DNA or protein) in COMSOL?

I need to simulate the optical properties of a biomaterial, namely DNA, in COMSOL. Basically I need to simulate the IR absorption spectrum of a cylinder filled with a 'concentration' of DNA. I am...

21 February 2021 3,043 3 View

How to get/count refractive index in gasses?

20 February 2021 8,202 6 View

Could we interpret the intensity of the peaks of the FTIR spectrum correlating to the concentration of some compound?

If we analyze the extract of two plants from the same species (for example) and there are very similarities between the two IR spectra except for the intensity of one peak at the same wavenumber....

05 February 2021 2,630 5 View

How do you annotate figures to show significance?

30 January 2021 1,008 3 View

How to use multiple tables to generate a graph in Graphpad Prism?

I have two different tables: one for metabolic activity of the cells in a plate, the other one is the Total DNA assay from the same plate. I need to generate a graph which represents metabolic...

29 January 2021 3,294 5 View

How to prepare a liquid sample for FTIR spectrum?

I have a ethanol-water 50% extract of mango peel. I purified mangiferin from the extract with filtration and precipitation. so i obtained a low concentrated extract which i want to se the IR...

24 January 2021 8,880 7 View

Regarding to presentation of pairwise comparison of data?

22 January 2021 8,648 1 View

What does the intensity of peaks in FTIR spectrum indicates?

Is it possible to conclude that increasing the intensity of FT-IR peaks represents an increment of functional groups or interaction between functional groups? Any suggestion would be highly...

20 January 2021 7,683 3 View

Ioana Maria Cortea

Have you considered peak shifting? Peak shifts are generally related to structural changes, but there are other causes as well that can explain this behavioral response. Also, it would be useful to provide any data on the sample that you investigated. What is the physical state of the sample? Is it a mixture? How was the analysis carried out? Etc.

So, if I understood correctly, you have a powder sample of known composition, and one of the main absorption bands is shifted to lower wavenumbers compared to the literature. What band? Could this peak be affected by the particle size of your sample?