Method and apparatus for applying liquid samples

Details Method and apparatus for applying liquid samples Method and apparatus for applying liquid samples

1992-01-28

1993-04-20

Housel, James C.

Chemistry: analytical and immunological testing

Automated chemical analysis

Utilizing a moving indicator strip or tape

436 46, 436 47, 436 49, 436 50, 422 66, 422 67, 422100, G01N 3500, G01N 2101

Patent

active

052042685

ABSTRACT:
A method for applying a droplet of a liquid sample from a sample applying nozzle, which is movable between a retracted position and a sample applying position, to a test film which contains a reagent which will react with a liquid sample and give rise to a change in optical density, includes providing the leading edge of the sample applying nozzle with a test film sensor. Prior to the application of the droplet of the liquid sample to the test film, the sample applying nozzle is moved down until the test film sensor comes into contact with the test film, and the distance by which the sample applying nozzle was moved down is stored. At the time the liquid sample is applied to the test film, the distance by which the sample applying nozzle is moved down is adjusted in accordance with the stored distance so that the sample applying nozzle is moved down to a sample applying position spaced a predetermined distance from the test film.

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patent: 5049359 (1991-09-01), Azuma et al.
patent: 5102624 (1992-04-01), Muraishi

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