Abstract
The significance of the absorption at 2170 nm due to peptide bonds for the determination of protein content by near infrared (NIR) spectroscopy was evaluated by comparing it with absorptions due to other nitrogens (non-peptide nitrogens in protein and non-protein nitrogens). The amide group (asparagine and glutamine), guanido group (arginine), imidazole group (histidine) and amino group (lysine) in proteins did not exhibit absorption at 2170 nm. The absorptions of nucleic acid related compounds also were not observed at 2170 nm. These results suggest that a wavelength of 2170 nm is suitable for the accurate determination of protein content in foods.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
