Large-volume stacking for quantitative analysis of anions in capillary electrophoresis II. Large-volume stacking without polarity switching

Optimization of the indirect fluorimetric detection for the simultaneous analysis of inorganic anions and polycharged organic anions by capillary electrophoresis

“…The effective reversion of the electroosmotic flow was controlled by injection of wat e r. Such a behav i o u r totally agreed with previously data of the literature [36,51].…”

“…For instance OFM Anion -BT [16][17][18]32,35], cetyltrimethylammonium (CTAB) [21][22][23][24][25]36,37], hexamethonium [20,27,28,34] or trimethyltetradecylammonium (TTAB) [27,[29][30][31]33,[36][37][38] can be noted.…”

“…Several detection methods have been used, including amperometric detection in non aqueous media [14] or suppressed conductivity detection [4]. Neve rtheless the direct or indirect photometric detection methods are mainly e m p l oye d. The direct UV detection applies unfo rt u n at e ly only to a few number of inorganic anions such as Br -, I -, NO -2 NO -3 and SCN - [19,24,25,33,36,[39][40][41][42][43][44]. On the other hand, the indirect UV detection appears more attractive due to its universality.…”

On-line Sample Preconcentration by Large-volume Sample Stacking with an Electroosmotic Flow Pump (LVSEP) in Microscale Electrophoresis

“…This was originally developed by Burgi, who used diethylenetriamine (DETA) as an additive to reduce the EOF. 16 In previous LVSS reports, cationic-surfactants system [16][17][18][19][20][21][22][23][24][25][26][27] or a non-aqueous CE (NACE) mode [28][29][30][31][32] were mainly employed to obtain a slower anodic EOF. Despite that the first LVSS study 16 tried to inject a low-conductivity sample into the whole capillary to obtain a higher concentration efficiency, most LVSS studies have involved optimization of the injection length to be compatible with both the sensitivity and the resolution.…”

The Production, Separation and Stability of Pyoluteorin: A Biological Pesticide

“…Thus, stacking could be achieved at the boundary between sample and CE zone. The method has been confirmed on sensitivity improvement of CE analysis for environmental samples (Albert et al, 1997;Palmarsdottir et al, 1997;Liu et al, 2008), and received approval in trace determination of pesticides and other environmental pollutants (Nunez et al, 2002;Carabias-Martinez et al, 2003;Lagarrigue et al, 2008). Herein, we developed a method of CE which combined field-amplified sample stacking to analyze trace amount of Plt.…”