Development and Evaluation of Solbrax-Water Nanoemulsions for Removal of Oil from Sand

Table 1

Cloud point of aqueous solutions of Ultrol L70 surfactant.

Surfactant	Concentrations (wt.%)	Cloud point (K)	W/O interfacial tension (mN·m^−1)
Ultrol L70	10	306 ± 1	0.9 ± 0.1
	11	307 ± 1	0.5 ± 0.1
	12	308 ± 1	0.5 ± 0.1

The analyses were made in triplicate and the results were presented as average of each measure with its standard deviation.