Determination of effective charge of small ions, polyelectrolytes and nanoparticles by capillary electrophoresis

Characterization of gold nanoparticles with different hydrophilic coatings via capillary electrophoresis and Taylor dispersion analysis. Part I: Determination of the zeta potential employing a modified analytic approximation

“…The same instrumentation, which is employed for CE, can be also used for Taylor dispersion analysis (TDA), which was recently demonstrated by several working groups [28,29]. TDA allows (independent of capillary electrophoresis) the precise determination of number-weighted or volume-weighted mean hydrodynamic radii (a needed quantity for the correct determination of f assuming identity of the sphere radius a (according to the definition given by Wiersema et al [9]) and the hydrodynamic radius r H obtained from application of the Stokes-Einstein equation).…”

Generalized polymer effective charge measurement by capillary isotachophoresis

“…Different methods have been investigated for polymer effective charge determination including conductivity measurements [14], osmotic pressure [15], scattering techniques [16] and electrophoretic techniques [17][18][19][20][21][22][23][24][25]. Conductivity and osmotic pressure measurements are generally performed in the absence of additional salts (or at very low ionic strength), while neutron scattering techniques requires specific and restricted-access source of radiations.…”

“…in ref [25]. These approaches are generally based on the experimental determination of the electrophoretic mobility and size (hydrodynamic radius) in combination with a theoretical model.…”

Plasmonic nanoparticles and their characterization in physiological fluids

“…A possibility to circumvent this low mobility is to switch to a liquid separation medium. Le Saux et al [112], Ibrahim et al [113] and Liu et al [114] have shown that capillary electrophoresis might be a suitable alternative to separate and/or determine properties of larger analytes.…”