Method and system for measuring the zeta potential of the...

Details Method and system for measuring the zeta potential of the... Method and system for measuring the zeta potential of the...

2006-09-12

2010-02-16

Bell, Bruce F (Department: 1795)

Chemistry: electrical and wave energy

Processes and products

Electrical

C204S450000, C204S451000, C204S549000, C204S554000, C204S555000, C204S409000, C204S600000, C204S601000, C204S602000, C204S645000, C204S660000, C204S661000, C204S670000, C204S671000

Reexamination Certificate

active

07662268

ABSTRACT:
The present invention discloses a method for measuring the zeta potential at the cylinder's outer surface. In the measuring cell, the cylinder is held coaxially inside a reference tube and a given solution is forced to flow through the annular flow channel between the cylinder and the reference tube. The streaming potential induced by the flow forced with a hydraulic pressure drop is measured to determine the zeta potential, ζm, of the cylinder's outer surface by using the following Equation,E_Δ⁢⁢P==-Dμ⁢⁢k⁢(ζm+ζref2)⁢Fwhere D is the permittivity, ζrefis the zeta potential of the reference tube, μ is the viscosity of the solution, k is the electric conductivity of the solution, and F is a correction factor for the electrokinetic model. Moreover, this invention also discloses a system for measuring the zeta potential of the cylinder's outer surface.

REFERENCES:
patent: 6766817 (2004-07-01), da Silva
patent: 6918404 (2005-07-01), Dias da Silva
patent: 7066586 (2006-06-01), da Silva
patent: 2002/0022100 (2002-02-01), Gord et al.
patent: 2003/0024817 (2003-02-01), Chun et al.
patent: 2005/0178702 (2005-08-01), Chuang et al.
patent: 2009/0251128 (2009-10-01), Chuang et al.

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