20 results found for: “zeta_potential”.

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Zeta potential

Zeta potential is the electrical potential at the slipping plane. This plane is the interface which separates mobile fluid from fluid that remains attached...

Last Update: 2020-06-23T04:36:50Z Word Count : 1974 Synonim Zeta potential

Zeta potential titration

Zeta potential titration is a titration of heterogeneous systems, for example colloids and emulsions. Solids in such systems have very high surface area...

Last Update: 2021-01-14T22:30:14Z Word Count : 309 Synonim Zeta potential titration

Titration

metal ions in solution. Zeta potential titrations are titrations in which the completion is monitored by the zeta potential, rather than by an indicator...

Last Update: 2021-01-26T22:27:16Z Word Count : 4604 Synonim Titration

Sour cream

function. This equation is used to find the zeta potential, which is calculated to find the electrokinetic potential in colloidal dispersions. Through electrostatic...

Last Update: 2021-02-15T20:16:14Z Word Count : 3395 Synonim Sour cream

Catherine Zeta-Jones

Catherine Zeta-Jones Douglas CBE (/ˈziːtə/; born 25 September 1969) is a Welsh actress. Born and raised in Swansea, Zeta-Jones aspired to be an actress...

Last Update: 2021-02-22T18:49:28Z Word Count : 9323 Synonim Catherine Zeta-Jones

Streaming current

well-defined geometries are a sensitive method to characterize the zeta potential of surfaces, which is important in the fields of colloid and interface...

Last Update: 2020-11-16T01:11:01Z Word Count : 1023 Synonim Streaming current

Zeta (disambiguation)

Zeta is the sixth letter of the Greek alphabet. Zeta or ZETA may also refer to: GM Zeta platform, a full-size car series Zeta (automobile), an Australian...

Last Update: 2020-10-31T17:00:49Z Word Count : 372 Synonim Zeta (disambiguation)

Sedimentation potential

measuring the potential. This difference in potential through rotation by 180 degrees is twice the sedimentation potential. The zeta potential can be determined...

Last Update: 2020-10-07T17:52:35Z Word Count : 1627 Synonim Sedimentation potential

Red blood cell

membranes of the cell. The normal zeta potential of the red blood cell is −15.7 millivolts (mV). Much of this potential appears to be contributed by the...

Last Update: 2021-02-11T11:06:04Z Word Count : 7666 Synonim Red blood cell

Indicator

metal ions in complexometric titrations Zeta potential, a property of interfaces in fluids for Zeta potential titration Humidity indicator card, a card...

Last Update: 2020-01-30T08:35:51Z Word Count : 383 Synonim Indicator

Colloid

can manifest in significant alteration to the zeta potential. When the magnitude of the zeta potential lies below a certain threshold, typically around...

Last Update: 2021-02-22T10:02:54Z Word Count : 4266 Synonim Colloid

Zeta

Zeta (UK: /ˈziːtə/, US: /ˈzeɪtə/; uppercase Ζ, lowercase ζ; Ancient Greek: ζῆτα, Demotic Greek: ζήτα, classical [d͡zɛ̌:ta] or [zdɛ̌:ta] zē̂ta; Modern...

Last Update: 2021-02-04T23:13:07Z Word Count : 1833 Synonim Zeta

Suspension (chemistry)

of two or more liquids that are generally immiscible Zeta potential – Electrokinetic potential in colloidal dispersions Turbidity – The cloudiness of...

Last Update: 2021-02-03T11:08:43Z Word Count : 1026 Synonim Suspension (chemistry)

Orange juice

juice. The suspension is unstable when the zeta potential is less than 25 mv in magnitude. Zeta potential is a measure of the magnitude of electrostatic...

Last Update: 2021-02-16T03:54:30Z Word Count : 5143 Synonim Orange juice

Electrophoresis

viscosity of the dispersion medium (Pa s), and ζ is zeta potential (i.e., the electrokinetic potential of the slipping plane in the double layer, units mV...

Last Update: 2020-11-01T10:32:28Z Word Count : 1378 Synonim Electrophoresis

Peptization

electrostatic repulsion is most commonly studied in terms of zeta potential. Colloid Suspension Zeta potential Dispersion Y. Li, T. J. White; Lim, S. H.; Lim, S...

Last Update: 2021-02-21T21:52:15Z Word Count : 366 Synonim Peptization

Erythrocyte sedimentation rate

resisting sedimentation, namely the negative charge of the erythrocytes (zeta potential). When an inflammatory process is present, the high proportion of fibrinogen...

Last Update: 2020-12-02T02:15:00Z Word Count : 2708 Synonim Erythrocyte sedimentation rate

Coombs test

negative charge called zeta potential which causes them to have a natural repulsion for one another. Potentiators reduce the zeta potential of RBC membranes...

Last Update: 2021-02-06T15:32:38Z Word Count : 1732 Synonim Coombs test

Double layer (surface science)

Electric potential at this plane is called electrokinetic potential or zeta potential (also denoted as ζ-potential). The electric potential on the external...

Last Update: 2021-02-16T14:33:49Z Word Count : 3053 Synonim Double layer (surface science)

Isoelectric point

the surface. Electrokinetic phenomena generally measure zeta potential, and a zero zeta potential is interpreted as the point of zero net charge at the...

Last Update: 2021-02-22T12:56:41Z Word Count : 2695 Synonim Isoelectric point

Main result

Zeta potential

Zeta potential is the electrical potential at the slipping plane. This plane is the interface which separates mobile fluid from fluid that remains attached to the surface. Zeta potential is a scientific term for electrokinetic potential in colloidal dispersions. In the colloidal chemistry literature, it is usually denoted using the Greek letter zeta (ζ), hence ζ-potential. The usual units are volts (V) or millivolts (mV). From a theoretical viewpoint, the zeta potential is the electric potential in the interfacial double layer (DL) at the location of the slipping plane relative to a point in the bulk fluid away from the interface. In other words, zeta potential is the potential difference between the dispersion medium and the stationary layer of fluid attached to the dispersed particle. The zeta potential is caused by the net electrical charge contained within the region bounded by the slipping plane, and also depends on the location of that plane. Thus, it is widely used for quantification of the magnitude of the charge. However, zeta potential is not equal to the Stern potential or electric surface potential in the double layer, because these are defined at different locations. Such assumptions of equality should be applied with caution. Nevertheless, zeta potential is often the only available path for characterization of double-layer properties. The zeta potential is a key indicator of the stability of colloidal dispersions. The magnitude of the zeta potential indicates the degree of electrostatic repulsion between adjacent, similarly charged particles in a dispersion. For molecules and particles that are small enough, a high zeta potential will confer stability, i.e., the solution or dispersion will resist aggregation. When the potential is small, attractive forces may exceed this repulsion and the dispersion may break and flocculate. So, colloids with high zeta potential (negative or positive) are electrically stabilized while colloids with low zeta potentials tend to coagulate or flocculate as outlined in the table.


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