Patent ID: 7343784

Claim:
A method for measuring the surface tension at an interface between a first and a second, essentially immiscible liquid, comprising the steps of: adding a volume of the first liquid in a first or lower well provided in a body having a horizontal surface, the well having a closed bottom portion, and a wall portion or portions extending from the bottom portion to define a well opening, adding a volume of the second liquid in a second or upper well having a wall portion or portions extending from an upper well opening to a lower well opening, which lower opening, in a first position, is adapted to be sealed by the said horizontal surface, moving the upper well so sealed and the said surface relatively each other from the said first position to a second position so as to align the lower opening of the upper well with the upper opening of the lower well, to deposit the second liquid on top of the first liquid and to provide an interface between the first and the second liquid, introducing a probe into the interface; and measuring the surface tension of the interface.