Table 2. Results of surfactant screening assay.

Surfactants	Appearance at 10-min standing at 25°C	Appearance after 4-h standing at 25°C
Emulpon CO-360	Transparent	Transparent
Emulpon CO-550	White emulsion	Phase separation
ATLAS G-5000-S0-(AP)	Semitransparent	Phase separation, precipitation
Tergitol L-61	Transparent	Transparent
Tergitol L-62	Semitransparent	Phase separation
Tergitol 15-S-9	Turbid	Phase separation, precipitation
Tergitol 15-S-30	Turbid	Phase separation, precipitation
Witconol PEG-400	White emulsion	Phase separation, precipitation
Witconol NP-200	White emulsion	Phase separation, precipitation
Witconate P-1220EH	Turbid	Phase separation, precipitation
Amadol 5195	White	Phase separation, precipitation
Rhodafac RS-410	Semitransparent	Phase separation
Rhodafac RE-610	Transparent	Transparent