Reports

Microelectrophoresis with Alternating Electric Fields

Science  09 Apr 1965:
Vol. 148, Issue 3667, pp. 229-231
DOI: 10.1126/science.148.3667.229

Abstract

Electrophoretic mobility of microscopically visible particles is measured from photographs of their oscillatory migration in a low frequency electric field. The measurements are inherently free of gravitational or thermal-convective drifting. Many measurements may be made from one photograph. An automatic timing circuit insures reproducibility and determines the sign of the particles' charge.

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