Macrocyclic polyamine as a selective modifier in a bonded-phase capillary column for the electrophoretic separation of aromatic acids

Reproducible chiral capillary electrophoresis of methamphetamine and its related compounds using a chemically modified capillary having diol groups

“…Thus, there is a need to improve the reproducibility of migration times for analytes by CE. For this purpose, capillary walls have been modifi ed by applying a sulfonated polymer [12] or noncovalent anionic polymer [13], and by covalently linking a macrocyclic polyamine [14] or sulfonated groups [15,16]. Better 1 3 reproducibility in CE can be achieved by the relatively constant EOF.…”

A macrocyclic polyamine as an anion receptor in the capillary electrochromatographic separation of carbohydrates

“…We have demonstrated that 24-and 28-membered macrocyclic polyamines are highly selective as the receptor for anions such as oxyanions, polycarboxylates and polyphosphates in the CEC separation [27][28][29][30][31][32][33][34][35]. This highly selective property has been attributed to anion coordination, anion exchange, and reversal of the EOF provided by the wall-bonded functional groups.…”

Capillary electrochromatographic separation of metal ion species with on-line detection by inductively coupled plasma mass spectrometry

“…4A). and (Ph) 4 As + mixture, it was found that increasing the applied voltage from 0, −10, −15, −20 and −25 kV, a better resolution and higher intensity was obtained. Meanwhile faster mobility was indicated, except for the positive ion, (Ph) 4 As + .…”

“…The interaction between analyte and the bonded phase was expected to be predominantly anion complexation [3,4]. Taking account of having higher fraction of protonated bonded phase and higher effective charge of the analyte, pH value of the background electrolyte was kept at 6.0-6.5.…”

“…Improvements in column technology will be of prime importance for the continued growth and development of CEC. Bonded phase capillary column containing macrocyclic polyamine have been pre-pared and evaluated for their use in the electrophoretic separation of organic and inorganic anions [2][3][4]. We found that the highly selective property can be attributed to anion complexation, anion exchange and reversal of the electroosmotic flow (EOF) provided by the wall-bonded functional groups.…”