Du Noüy ring method is a conventional method for measuring the surface tension. Measuring the wet properties of the interface has some little effect on this technique. Maxim pulling is mounted on the ring from the measured surface and a platinum ring is applied in its place of the plate which is submerged in the liquid, since, the ring is drawn from the liquid, the force necessary to separate the liquid from the surface is calculated precisely, this force is associated to the liquid surface tension. Platinum rings ought to be cleaned precisely without imperfections or scratches since they can influence the result accuracy.
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