Proteins are complex in nature and have different structural forms. Is the qualitative and quantitative analysis by FTIR is possible for the proteins? and How?
I dont know about quantitative analysis but yes we can analyze it by qualitatively or we can check weather protein is present or not in your sample by FTIR..Protein absorbance peak comes between 1600-1700 ..
http://www.ncbi.nlm.nih.gov/pubmed/17687489 this article may be helpful for you