Separation and determination of anesthetics by capillary electrophoresis with mixed micelles of sodium dodecyl sulfate and Tween 20 using electrochemiluminescence detection

Luminescence ◽  
2012 ◽  
Vol 28 (5) ◽  
pp. 673-678 ◽  
Author(s):  
Yan-Ming Liu ◽  
Jie Li ◽  
Yang Yang ◽  
Jun-Jun Du
Keyword(s):  
Capillary Electrophoresis ◽  
Sodium Dodecyl Sulfate ◽  
Mixed Micelles ◽  
Sodium Dodecyl ◽  
Tween 20 ◽  
Dodecyl Sulfate

scholarly journals Conductometric study of sodium dodecyl sulfate - nonionic surfactant (Triton X-100, Tween 20, Tween 60, Tween 80 or Tween 85) mixed micelles in aqueous solution

2012 ◽  
Vol 66 (1) ◽  
pp. 21-28 ◽  
Author(s):  
Dejan Cirin ◽  
Mihalj Posa ◽  
Veljko Krstonosic ◽  
Maja Milanovic
Keyword(s):  
Sodium Dodecyl Sulfate ◽  
Synergistic Effect ◽  
Nonionic Surfactants ◽  
Mixed Micelles ◽  
Sodium Dodecyl ◽  
Tween 80 ◽  
Tween 20 ◽  
Dodecyl Sulfate ◽  
Tween 60 ◽  
Triton X

The present study is concerned with the determination of the critical micelle concentration (cmc) of mixed micelles of sodium dodecyl sulfate with one of five nonionic surfactants (Triton X-100, Tween 20, Tween 60, Tween 80 or Tween 85) from conductance measurements. Based on the calculated values of the ? parameters we have noticed that SDS-nonionic surfactants mostly showed strong synergistic effect. It was found that nonionic surfactants with mainly longer and more hydrophobic tail show stronger interactions with hydrophobic part of SDS, thus expressing stronger synergism. In SDS-Tween 80 binary system the strongest synergistic effect was noticed. SDS-Tween 85 micellar system showed antagonistic effect, most probably because the presence of the double bond in its three hydrophobic tails (three C18 tails) makes it sterically rigid.

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