Sample stacking of fast-moving anions in capillary zone electrophoresis with pH-suppressed electroosmotic flow.
On-line sample concentration of fast moving inorganic anions by large volume sample stacking (LVSS) and field enhanced sample injection (FESI) with a water plug under acidic conditions is presented. Detection sensitivity enhancements were around 100 and 1000-fold for LVSS and FESI, respectively. However, reproducibility and linearity of response in the LVSS approach is superior compared to the FESI approach.
Quirino
J P
JP
Faculty of Science, Himeji Institute of Technology, Hyogo, Japan. jquirino@sci.himeji-tech.ac.jp
Terabe
S
S
D000838:Anions / Q000032:analysis*; D019075:Electrophoresis, Capillary / Q000379:methods*; D006863:Hydrogen-Ion Concentration
D000838:Anions