Importance

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Abstract

A top with a mantle wall defining a sample space, for receiving a liquid sample, the tip having first open end to be inserted into a liquid and a second open end for attaching the top to a suction device intended for dispensing, which tip is provided with a membrane device closing the gas and liquid passage in a gas and liquid tight manner from the first end of the tip to the suction device, when the tip is attached to the suction device, the membrane of the membrane device being made of a gas and liquid impermeable, flexible, reversibly deformable material. Also, a method for dispensing a liquid with a suction device has an end part, which encloses a cylindrical space having a reciprocating device, such as a plunger, for receiving a sample and for removing it therefrom, in which suction device the plunger is brought in contact with the membrane device comprising a membrane, made of a gas and liquid impermeable, flexible, reversibly deformable material, for changing the volume delimited by the membrane from the sample space of the disposable tip for taking a sample and/or removing it, and that the tip is removed from the end part of the suction device by translating the movement of the plunger relative to the tip.

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First Claim