A Thermometric Titration Study on the Micelle Formation of Sodium Decyl Sulfate in Water

Aggregation behavior of hexadecyltrimethylammonium surfactants with various counterions in aqueous solution

“…In the present study, the differential enthalpy was used to determine the CMC. The observed enthalpy curves were differentiated with respect to the final surfactant concentration C and the extremum of the differential curve was taken to be the CMC [27]. There is an excellent agreement between the CMC values obtained from microcalorimetry and conductivity.…”

“…There is an excellent agreement between the CMC values obtained from microcalorimetry and conductivity. The enthalpy of micellization ( H mic ) can be determined from the difference between the observed enthalpies of the two linear segments of the plots at the CMC [27,28] as shown in Fig. 3.…”

Electrochemical Behavior of Catecholamines and Related Compounds at In Situ Surfactant Modified Carbon Paste Electrodes

“…The anionic surface active agents: sodium dodecyl sulfate (Laurylsulfate, LS) (critical micellar concentration in water, cmc ¼ 7.4 mM [27]), sodium decylsulfate (DS) (cmc ¼ 33 mM [28]), with the same hydrophobic group but shorter aliphatic chain length, and sodium dodecylsulfonate (DD), with 12 carbon atoms in the hydrophobic chain but a different polar group, were obtained from Sigma (Spain). The cationic surfactants: N-cetyl-trimethyl ammonium chloride (CTAC) (cmc ¼ 1.31 mM [29]), N-decyl-trimethylammonium chloride (DTAC) (cmc ¼ 24.4 mM [29]) and dodecylpirydinium chloride (DP) (cmc ¼ 16.8 mM [30]) were purchased from Merck (Spain).…”

Study of inclusion complexes of cycloamylose with surfactants by isothermal titration calorimetry

“…3). The CMC of SDS and DTAB, determined from the inflection point in the DH/D[surfactant] versus the surfactant concentration curve, was 2.7 ± 0.2 mM and 14.8 ± 0.0 mM, respectively (Király & Dekány, 2001). The CMC value of SDS was a slightly lower than $3.3 mM reported in earlier studies (Wangsakan et al, 2004).…”

“…7). The CMC and CMC * of SDS were determined in the absence and presence of CA from the inflection point in the DH/ D[surfactant] versus surfactant concentration curve as mentioned earlier (Király & Dekány, 2001;Majhi & Blume, 2001).…”