Retention Factor and CMC

The microemulsion system to estimate the CMC of free, glycine, and taurine derivative is MEEKC-SDS. This system employs SDS as surfactant, butanol as cosurfactant, octane as oil and an aqueous buffer at pH 7.50. At that pH, the BAs are in the anionic form. 

The mobilities of the BA were calculated in the MEEKC system and in free solution (Equation 19.6). Methanol and dodecaphenone were the EOF and microdroplets marker, respectively (Table 19.5). 

TABLE 19.5 Electrophoretic Mobilities and k Values of Free and Conjugate BAs in MEEKC-SDS Mobilities Expressed as 10 V s  

CMC values taken from Refs. [36,37,40] —, no data available.  

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