The Electric Mobilities of Glycine, Alanine, and Glycyl-glycine.

Particle Deposition at a Charged Solid/Liquid Interface

“…(2-5) becomes simply d 2 1/J dx 2 = K 21/J (2)(3)(4)(5)(6)(7)(8)(9) which has an explicit solution (2-10)…”

“…The relationship between~-potential and electrophoretic mobility is long established: in the case of small Ka (but >0.1), the use of the Debye-Huckel approximation yields the following expression for spheres However, many systems of interest in particle-collector interactions do not correspond exactly to either of these two limiting cases, and it is necessary to assume that the external field (that is deformed by the presence of the colloidal particle) and the field of the double layer are additive. Consequently, Henry [65] derived the following expression for the mobility E( iatJ1 i atJ1 ) U E = -~+ 5a 5 -dr -20 3 -dr 11 00 ,0 00 r 4 (2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17) where r is the radial distance from the centre of the particle. Combining the Debye-Huckel approximation with Eq.…”

“…Combining the Debye-Huckel approximation with Eq. (2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17), and integrating yields the so-called Henry equation…”

“…(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16). Two specific assumptions are necessary to allow its derivation: first that the ion atmosphere is undisturbed by the external field and secondly that the potential, tJ1 in Eq.…”

“…The most distinct progress in this method was made by Philpot [5] in the late 1930's who extended the range of electrophoretic separations beyond the scale limitations imposed by the classical U-tube apparatus for moving boundary electrophoresis, by adapting the batch technique to continuous separations. Eventually this evolved into the "thin-film" electrophoretic device [6,7] that is now commercially available. The different apparatus and various features that have since been introduced have been reviewed by Pruzik [8].…”