Electroosmotic flow (EOF) usually accompanies electrophoretic migration of charged species in capillary electrophoresis unless special precautions are taken to suppress it. The presence of the EOF provides certain advantages in separations. It is an alternative to mechanical pumps, which are inefficient and difficult to build at small scales, for transporting reagents and analytes on microfluid...

A capillary zone electrophoresis method for the determination of Na in milk and milk products was developed and compared with an International Organization for Standardization/International Dairy Federation standard method that is based on flame atomic absorption spectrometry. The adoption of a background electrolyte consisting of 10 mM imidazole adjusted to pH 3.75 by the addition of oxalic ac...

Electroosmotic flow (EOF) is one of the fundamental processes affecting both resolution and separation times in capillary zone electrophoresis (CZE). EOF is a function of pH and buffer composition (zeta potential) in bare-silica capillaries at any pH above 3 and runs in the cathodal direction, decreasing the effective separation length for cationic species. On the other hand, the absence of EOF...

Capillary electrophoresis (CE) has emerged as a powerful technique for comprehensive physicochemical characterization of monoclonal antibodies (mAbs) well other therapeutic modalities. The method provides high resolution separation and sensitivity analysis biomolecules. CE based techniques such sodium dodecyl sulphate capillary gel (SDS-CGE, also referred to SDS), zone (CZE) imaged isoelectric ...

by addition of calculated amounts of 200 g/L glucose. Serum glucose concentrations attained by this procedure were controlled by measurement with the Beckman Glucose Analyzer. The sensitivity to glucose (calculated for the range 5–10 mmol/L) in phosphate buffer (pH 7.4) was 10.2 Ϯ 3.3 nA ⅐ L ⅐ mmol Ϫ1 (mean of slopes calculated from each experiment Ϯ SE; Fig. 1A).The sensitivity to glucose afte...