1. Inorganic ions

Capillary electrophoresis in CZE mode is perfectly suited to the analysis of inorganic ions, since these species are charged. The electrolyte, a conductive liquid that fills the capillary, is usually a buffer solution where the species migrate according to their own electrophoretic migration and the electroosmotic flow generated when a voltage is applied to the ends of the capillary, which has charged groups on its surface [P 3 365] . Two ions therefore have different speeds and are separated if their electrophoretic mobilities are different, i.e. if their charge-to-size ratios differ.

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Inorganic ions

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Organic ions

Bibliography

(1) - BECKERS (J.L.), BOCEK (P.) - The preparation of background electrolytes in capillary zone electrophoresis: golden rules and pitfalls. - Electrophoresis, 24, 518-535 (2003).
(2) - JOHNS (C.), BREADMORE (M.C.),...

Standards and norms

Milk powder – Determination of soybean and pea proteins by capillary electrophoresis in the presence of sodium dodecyl sulfate (SDS-CE) – Screening method - ISO 17129 - 2006
Powdered milk-based infant formulas – Quantification of whey protein content by capillary electrophoresis on sodium dodecyl sulfate gel (SDS-CGE) - ISO/DIS 23293 - 2020
Evaluation and Recommendation of Pharmacopoeial Texts for Use in...