Separation of organic acids by capillary zone electrophoresis in buffers containing divalent metal cations

Determination of -Ascorbic Acid in Lycopersicon Fruits by Capillary Zone Electrophoresis

“…The addition of divalent metal cations to the buffer has been found effective for the separation of organic compounds (35)(36)(37)(38). However, any significant modification in resolution was obtained when 0.5-2 mM Ca 2ϩ was added to the BGE(i).…”

Assays for serum cholinesterase activity by capillary electrophoresis and an amperometric flow injection choline biosensor

“…With separation voltage of 12 kV, the effects of pH on migration time and peak area were investigated using different buffer systems [16][17][18]: 20 mM acetate-tris buffer for pH 5.0-7.0, 20 mM phosphate buffer for pH 6.0-8.0 and 20 mM borate buffer for pH 9.0-11.0. The lower the pH, the longer the migration time and the poorer the peak symmetry, which led to a poor peak area reproducibility at acidic pH (RSD = 10% for benzoylcholine, RSD = 24% for benzoate at pH 5.0 in acetate-tris buffer, n = 7).…”

Influence of the Buffer Organic Cation on the Chiral Separation of Some Basic Drugs by Capillary Zone Electrophoresis

“…The effect of inorganic cations has been studied by Issaq et al [8,9], Green and Jorgenson [10], Valkó [11], Nielen [12], and Chiari et al [13]. With regard to the effect of organic cations, Valkó [11] mentioned that Tris cations in phosphate buffer had a favorable influence on the resolution of chiral mandelic acids.…”