. Author manuscript; available in PMC: 2015 Oct 2.

Published in final edited form as: Fluid Phase Equilib. 2015 Aug 25;400:103–113. doi: 10.1016/j.fluid.2015.05.009

Table 7.

Surface tension, γ, for the studied ILs as a function of temperature and at atmospheric pressure.

	[P_i(444)1][Tos]	[P₄₄₄₁][CH₃SO₄]	[P₄₄₄₂][(C₂H₅O)₂PO₂]	[P₈₈₈₈][Br]

T /K	γ /mN·m⁻¹	γ /mN·m⁻¹	γ /mN·m⁻¹	γ /mN·m⁻¹
293.2	38.1	35.5	31.4
298.2	37.3	34.7	30.5
303.2	36.6	34.1	29.8
313.1	35.5	33.5	29.2
318.1				27.4
323.1	35.0	32.9	28.5	27.1
333.1	34.3	32.2	27.5	26.6
343.1	38.1	35.5	31.4	26.0

Standard temperature uncertainty is u (T) = ±0.1 K and the surface tension expanded uncertainty is U_c (γ) = 0.1 mN·m⁻¹, with an approximately 95% level of confidence.