Critical Micelle Concentration

Critical micelle concentration (CMC) is a measure of the concentration of a solution component which represents a critical value above which increasing concentration of that component  forces formation of micelles.                     For more on theory click this link.

Methods of Measurement

Surface Tension vs Concentration Graph

A graph is produced which displays the surface tension of a solution vs the concentration of a component of the solution. The concentrations of solution required can be mixed with the use of automated dispensing (Sigma 700, Sigma 701) or done on a dilution series mixed manually (Sigma 703, Sigma 701, Sigma 700). The surface tension measurements can be done with the DuNouy ring or Wilhelmy plate.                          For more on theory click this link.

Instruments which can be used to measure CMC:

Sigma 700 the finest tensiometer available. Fiber range microbalance accurate to 1 microgram. DuNouy ring, Wilhelmy plate and custom probe experiments included in expansive software package. Automated dosing and mixing with optional dispenser make this time consuming experiment quick and easy.

Sigma 701 computer controlled research quality tensiometer. Measure with DuNouy ring, Wilhelmy plate or custom probe. Modular construction allows upgrade to full Sigma 700 capabilities. Accurate to 0.01 mN/m.

Sigma 703D a simple, reliable instrument for measurement of surface and interfacial tension by DuNouy ring and Wilhelmy plate methods. Ideal for quality control, basic research and educational stteings. Accurate to 0.1 mN/m. Manual mixing of solutions required.

Questions?  Call 1-800-280-6216    Now For Immediate Assistance

 e-Mail KSV

Click here