caa a22 4500 44580212X CHVBK 20180317145144.0 cr unu---uuuuu 170323e20110301xx s 000 0 eng 10.1007/s10337-010-1904-3 doi (NATIONALLICENCE)springer-10.1007/s10337-010-1904-3 A Comparative Study of Diamine-Modified and Amine-Modified Silica Nanoparticles as Pseudo-Stationary Phases for CE Separation [Elektronische Daten] [Li-Juan Hui, Yong Ma] The use of silica nanoparticles with surface modification in different applications is a topic of growing interest. This article provides a systematic comparison of diamine-modified and amine-modified silica nanoparticles as pseudo-stationary phases (PSPs) in capillary electrophoresis. The different electrophoretic behavior of these PSPs was evaluated by analysis of four auxins, indole-3-acetic acid (IAA), indole-3-butyric acid (IBA), 2,4-dichlorophenoxyacetic acid (dCPAA), and 2-(1-naphthyl)acetic acid (NAA). As expected, fast separation of the auxins was achieved, because they migrate in the same direction as the electro-osmotic flow under the optimum experimental conditions. However, the two nanoparticles had different selectivity and efficiency in the separation of the auxins, which could be related to the primary and secondary amines in their structures. The results indicated that even slight structural changes of the functional groups of the nanoparticles have pronounced effect on the interactions between the pseudo-stationary phase and the analytes. Springer-Verlag, 2011 Capillary electrophoresis nationallicence Pseudo-stationary phase nationallicence Silica nanoparticles nationallicence Diamine-modified nationallicence Amine-modified nationallicence Hui Li-Juan College of Biotech and Food Science, Bohai University, 121013, Jinzhou, China aut Ma Yong College of Biotech and Food Science, Bohai University, 121013, Jinzhou, China aut Chromatographia Springer-Verlag 73/5-6(2011-03-01), 507-515 0009-5893 73:5-6<507 2011 73 10337 https://doi.org/10.1007/s10337-010-1904-3 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10337-010-1904-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Hui Li-Juan College of Biotech and Food Science, Bohai University, 121013, Jinzhou, China aut NATIONALLICENCE 700 1- Ma Yong College of Biotech and Food Science, Bohai University, 121013, Jinzhou, China aut NATIONALLICENCE 773 0- Chromatographia Springer-Verlag 73/5-6(2011-03-01), 507-515 0009-5893 73:5-6<507 2011 73 10337 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer