I performed XRD analysis of my chitosan sample, I would like to ask for help to interpret its diffractogram. If its possible could someone share with me chitosan
JCPDS card 039-1894?
Thank you,
Kindly
Flynne
I could send you the requested card the next week, but if you search in the literature you can however see that your pattern match those reported for chitosan, so your phase is right
- Thank you Marcella Bini . I am willing to wait. If you would like to send it in email: [email protected].
Dear Dr. Marcella Bini
I would like to ask a follow up question. I have checked the JCPDS card of chitin, but I cannot seem to find the identity of the peak at 11 degrees. I've seen Chitosan xrd peaks from 9-10 degrees from literature. What could be the Miller index for the peak at 11 degrees? This is for the same chitosan diffractogram I've shown above. Your feedback will highly be appreciated.
Thank you
I searched the card you suggested. In fact there are differences with respect to your pattern . Do you use the copper wavelenght? I can try to search other files, if present in the database
Dear Ma. Flynne Dagalea ,
for hkl values of measured pattern please see for example Fig. 3 of:
https://www.nature.com/articles/s41598-021-81318-0
See also:
https://pubs.acs.org/doi/10.1021/bm200750t
Best regards
G.M.
Dear Dr. Marcella Bini
Yes, I used the copper wavelength. If it can help you, here is my data. I really appreciate your help.
I cannot find other files of chitosan in my old database. I'm sorry. However your pattern is similar to others present in the literature on the same material.
Good day Dr. Gerhard Martens. Thank you for your response. From your reference, hkl value of 020 correspond to 2θ of 9.3°. However, i got a peak at approximately 11°. Does the hkl value of 020 also correspond to 2θ of 11°? Thank you in advance
I think so...
It depends on what material do you really have.
Chitin or Chitosan (or something in between) have very close chemical composition and molecular structure...
For Chitin that peak is close to 9,8° gradually going to 11°; Fig. 3 and Table 2 of:
Article Determination of the degree of deacetylation of chitin and c...
and for Chitosan it is close to 11°; Fig. 4 of:
Article Synthesis and Characterization of Freeze Dryer Chitosan Nano...
and Fig. 7(b) of:
https://pubs.rsc.org/en/content/articlepdf/2018/ra/c8ra00287h
(labelled here by 020)
Best regards
G.M.
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