When measuring surface tension between liquid and gas, we can using Wilhelmy Plate Method and can easily get most precise result
of surface tension. By when we measureing interfacial tension between liquid and fluid system, we can not achieve satisfied
result. If we measuring contact angle for liquid-fluid-plate(solid) system, we can find that contact angles for different liquid-
fluid system vary in many dimensions. It can change from about 15° to 120°. But by contrast , contact angles between different
liquids and gas system, thery are almost remain unchanged. Even if we using Young-Laplace equation correcting method for error
correcting, we also can not get more satisfied value of surface tension. So, Wilhelmy Plate Method and DuNoüy Ring Method is not
most suitable method for measuring interfacial tension between liquid and fluid.
So, most effective method for measurement of liquid-fluid system is drop shape analysis method based on ADSA. But, we should
remember that it is most important and necessary to saturated liquid2 with liquid1.
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