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The influence of temperature and X-ray dose on the deprotonation of lyophilized phenylalanine during X-ray photoelectron spectroscopy
Umeå University, Faculty of Science and Technology, Chemistry.
Umeå University, Faculty of Science and Technology, Chemistry.
2006 (English)In: Journal of Electron Spectroscopy and Related Phenomena, Vol. 152, 87-90 p.Article in journal (Refereed) Published
Abstract [en]

Lyophilized phenylalanine (LP) samples were prepared from aqueous solutions at pH not, vert, similar 1.3 and subsequently analysed using X-ray photoelectron spectroscopy (XPS) in combination with cryogenics. When samples are measured at temperatures above not, vert, similar0 °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.

Place, publisher, year, edition, pages
2006. Vol. 152, 87-90 p.
Keyword [en]
Phenylalanine; XPS; Deprotonation
Identifiers
URN: urn:nbn:se:umu:diva-12362DOI: doi:10.1016/j.elspec.2006.03.004OAI: oai:DiVA.org:umu-12362DiVA: diva2:152033
Available from: 2008-04-01 Created: 2008-04-01 Last updated: 2011-01-11Bibliographically approved

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Gröbner, Gerhard

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