Abstract
The binding energies of N(1s) in ethylenediaminetetraacetic acid (EDTA) and its related compounds were measured by means of a photoelectron spectrometer, and the molecular structures of EDTA were discussed. Two kinds of peaks were observed in the N(1s) spectra of EDTA and its related compounds, with binding energies of about 401 and 399 eV. In EDTA-4H, the heights of the two peaks were almost equal, while in its sodium salts the peak height with the higher binding energy decreased as the number of carboxylate groups in the molecule increased. In EDTA-4Na, only a single peak with a low binding energy was observed. In EDTP-4H and GEDTA-4H, the spectra showed two peaks with different heights. The binding energy values of the main peaks of simple amino acids, such as glycine and alanine, were about 401 eV. From the above results, it can be deduced that there are two kinds of N atoms, =N+H– and =N– types, in an EDTA molecule.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: 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.