| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5397150 | Journal of Electron Spectroscopy and Related Phenomena | 2006 | 4 Pages |
Abstract
Lyophilized phenylalanine (LP) samples were prepared from aqueous solutions at pH â¼Â 1.3 and subsequently analysed using X-ray photoelectron spectroscopy (XPS) in combination with cryogenics. When samples are measured at temperatures above â¼0 °C deprotonation occurs, which gradually proceeds with X-ray bombardment. In addition, deprotonation scales linearly with the difference between the Cl and the Na concentration, which strongly suggests that HCl sublimates from the sample.
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Physical Sciences and Engineering
Chemistry
Physical and Theoretical Chemistry
Authors
Juan F. Cardenas, Gerhard Gröbner,