1 Research Article Effect of Starch Phosphorylation on Interaction with Chromium Ions in Aqueous Solutions † Ewa Bidzińska, Krystyna Dyrek, Elżbieta Wenda, Jadwiga Szczygieł, Krzysztof Kruczała * Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Kraków, Poland Corresponding author: Krzysztof Kruczała, kruczala@chemia.uj.edu.pl Phone: +48 12 686 2498 Fax: +48 12 686 2770 Ewa Bidzińska, bidzinsk@chemia.uj.edu.pl Krystyna Dyrek, dyrek@chemia.uj.edu.pl Jadwiga Szczygieł, jadwiga.szczygiel@uj.edu.pl Elżbieta Wenda, wenda@chemia.uj.edu.pl Keywords: starch modifications, phosphorylated starch, reduction of Cr(VI), chromium ions sorption, quantitative EPR † This article has been accepted for publication and undergone full peer review but has not been through the copyediting, typesetting, pagination and proofreading process, which may lead to differences between this version and the Version of Record. Please cite this article as doi: [10.1002/star.201800306]. This article is protected by copyright. All rights reserved. Received: November 7, 2018 / Revised: December 30, 2018 / Accepted: January 22, 2019