Grosse Constantino, Pedrosa Susana, Shilov Vladimir Nikolaievich
Departamento de Física, Universidad Nacional de Tucumán, Av. Independencia 1800, 4000, San Miguel de Tucumán, Argentina.
J Colloid Interface Sci. 2003 Sep 1;265(1):197-201. doi: 10.1016/s0021-9797(03)00517-4.
A correction of a recent work on the dependence of the DC conductivity of diluted colloidal suspensions on the size, zeta potential, and state of motion of dispersed particles (C. Grosse, S. Pedrosa, V.N. Shilov, J. Colloid Interface Sci. 251 (2002) 304) is presented. It is shown that the procedure used in that work to calculate the contribution of the particles to the conductivity of the suspension leads to a result that includes the variation of the conductivity of the dispersion medium. Revised analytical and numerical calculations are presented, which strongly reinforce the conclusions reached in the original work: The expression for the conductivity increment based on the value of the dipolar coefficient of the suspended particles (calculated taking into account their electrophoretic motion) appears to be valid over the whole range of particle sizes.
本文对近期一篇关于稀释胶体悬浮液直流电导率与分散颗粒大小、zeta电位及运动状态关系的研究工作（C. Grosse, S. Pedrosa, V.N. Shilov, J. Colloid Interface Sci. 251 (2002) 304）进行了修正。结果表明，该研究中用于计算颗粒对悬浮液电导率贡献的方法所得结果包含了分散介质电导率的变化。文中给出了修正后的解析计算和数值计算，这有力地强化了原研究得出的结论：基于悬浮颗粒偶极系数值（考虑其电泳运动计算得出）的电导率增量表达式在整个颗粒尺寸范围内似乎都是有效的。
