1. TU/e eindhoven university of technology / department of chemical engineering and chemistry The Use of Fluorosurfactant FC-129 in Micellar Electrokinetic Capillary Chromatography Ronny de Ridder 1,2, Francesco Damin 1, Jetse Reijenga 2 and Marcella Chiari 1 1.Institute of Biocatalysis and Molecular Recognition, C.N.R., Milano, Italy 2.Laboratory of Instrumental Analysis, Eindhoven University of Technology, The Netherlands

2. TU/e eindhoven university of technology / department of chemical engineering and chemistry FC-129 N-ethyl-N-[(heptadecafluorooctyl)sulfonyl]glycine, K salt [CAS 2991-51-7], Aldrich (Steinheim, Germany)

3. TU/e eindhoven university of technology / department of chemical engineering and chemistry CMC FC-129 = 0.5 mM CMC SDS = 8 mM CMC determination

4. TU/e eindhoven university of technology / department of chemical engineering and chemistry Experimental Spectra-Phoresis 1000 TM (Thermo Separation Products, Freemont, CA, USA) Fused silica, 50  m ID, 375  m OD L t =400 mm, L d =320 mm, V=20 kV UV detection @ 200 nm Injection 5.17. 10 3 N/m 2 pressure, 4 s BGE: 12.5 mM Sodium tetraborate pH 9.9

5. TU/e eindhoven university of technology / department of chemical engineering and chemistry Results EOF and Micelle Mobility

6. TU/e eindhoven university of technology / department of chemical engineering and chemistry Results Homologue phenol series

7. TU/e eindhoven university of technology / department of chemical engineering and chemistry Results 2-, 3- and 4-ethylphenol

8. TU/e eindhoven university of technology / department of chemical engineering and chemistry Results retention factors

9. TU/e eindhoven university of technology / department of chemical engineering and chemistry Conclusions EOF- & Micelle mobility comparable systematic decrease in retention factor interesting selectivity differences

10. TU/e eindhoven university of technology / department of chemical engineering and chemistry