I have some old Chitosan sample that I was going to use for research but after FTIR of this sample and comparing it with the standard FTIR spectrum of Chitosan, some of the peaks are missing. Should I buy new sample?
LEFT Graph- my Chitosan sample FTIR spectrum
Right Graph- Standard Chitosan sample FTIR spectrum
The IR spectrum alone may not be enough to verify if any sort of degradation occurred to your Chitosan. Therefore, before buying a new sample, I would suggest recording 1H- and 13C-NMR spectra and eventually a MS spectrum and a CHN elemental analysis.
Dear Muhammad Hassaan Hamid
If your chitosan sample's FTIR spectrum is missing peaks compared to the standard spectrum, it suggests that the sample may have degraded, lost functional groups, or undergone contamination over time. Chitosan is sensitive to environmental factors like moisture, temperature, and pH, which can alter its structure. If the missing peaks correspond to critical functional groups (e.g., amine or hydroxyl groups), the sample may no longer be suitable for research. It is advisable to purchase a new sample to ensure reliable and reproducible results.
Kind Regards.
Insufficient injection concentration or sample degradation or deterioration may cause missing peaks. You can increase the injection concentration appropriately or purchase new samples for use.
You may make an inquiry and buy new samples at Alfa Chemistry, they offer you advices and kinds of good-quality chemicals.
https://www.alfa-chemistry.com/inquiry
- Badges
- Science topic
- Similar topics
- Physical Sciences
- Materials Science
- Materials
- Nanomaterials