Importance

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Abstract

A suction device for dispensing a liquid having a membrane device mounted in a gastight manner in the air space jointly formed by the cylindrical space of its end part and the sample space of a tip to be mounted onto the end part, the membrane device comprising a membrane, made of a liquid and gas impermeable, flexible, reversibly deformable material, with which membrane the reciprocating device in the cylindrical space can be brought into contact for taking a liquid sample into the sample space of the tip and/or removing it therefrom. Also, a method for dispensing a liquid with a suction device has the reciprocating device in the cylindrical space enclosed within the end part of the suction device brought into contact with a membrane of the membrane device mounted in a gastight manner in the air space jointly formed by the cylindrical space and the sample space of the tip, to be mounted onto the end part, for taking a sample into the sample space and/or removing it therefrom and wherein the membrane device is released from the end part of the suction device by bringing the reciprocating device past its position used for taking a sample and/or removing it.

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First Claim