Means and method of measuring and dispensing

Details Means and method of measuring and dispensing Means and method of measuring and dispensing

1990-10-11

1993-02-02

Johnston, Jill A.

Chemistry: analytical and immunological testing

Including sample preparation

Volumetric liquid transfer

222282, 222309, 422100, B01L 302

Patent

active

051837650

ABSTRACT:
A method of metering and dispensing a first liquid, using a probe having an aspiration tip defining a tip chamber. The aspiration tip chamber is sized so as to be capable of holding and metering at least two largely different volumes of a first liquid. In the method a filler liquid is introduced into a portion of the chamber and a first liquid is aspirated in a predetermined amount into the chamber, so that a predetermined amount of the first liquid can be metered and dispensed with high accuracy and precision. The chamber is capable of being used for two largely different doses of the first liquid. Additional liquids can be aspirated along with the filler liquid. The filler using can be a reactant, a cleaner or the like.

REFERENCES:
patent: 4237094 (1980-12-01), Souvaniemi et al.
patent: 4457184 (1984-07-01), Shiono
patent: 4484698 (1984-11-01), Starr
patent: 4838999 (1989-06-01), Haar et al.
patent: 5015591 (1991-05-01), Meyrat et al.

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