HLB BALANCE OF MIXED NONIONIC SURFACTANTS 123 -2 -3 d I I i -4 -3 -2 log Cw (M) Figure 6. Partition isotherm of commercial NPE, in the cyclohexane-water system at 25øC. Filled circles (a, b, c, d) indicate the samples for GLC analysis (see Fig. 8). 7 6 8 5 9 õ o • 3 11 Time Figure 7. Gas chromatogram of commercial NPE•. Peak number denotes the EO chain length (mole).
124 JOURNAL OF THE SOCIETY OF COSMETIC CHEMISTS 4 8 10 6 4 (b) C--1.07 mM 10 12 4 6 (c) C----5.91 mM 6 8 4 (d) C=51.1 mM 6 8 6 4 10 Figure 8. Gas chromatograms of commercial NPEi partitioned into each phase as a function of total surfactant concentration (C).
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