The manuscript based on X-ray photoelectron spectroscopy on aqueous solutions containing KCl and different amino acids. Our analysis suggests that the presence of the inorganic ions at the surface of the liquid is strongly dependent on the pH of the solution and the type of amino acid.
FAPESP (the Sao Paulo Research Foundation, Process number 2017/11986-5
ANP (Brazil’s National Oil, Natural Gas and Biofuels Agency)
National Council for Scientific and Technological Development CNPq 401581/2016-0
Swedish-Brazilian collaboration STINT-CAPES (9805/2014-01).
Carl Tryggers Foundation
Swedish Research Council (grant 2017-04162)
Swedish Research Council (grant 2018-00740)
ORCID For Submitting Author0000-0003-1001-4134
Declaration of Conflict of InterestNone of the authors declares any competing interests with regard to the manuscript.