Chemistry: analytical and immunological testing – Including sample preparation
Reexamination Certificate
2011-08-23
2011-08-23
Warden, Jill (Department: 1773)
Chemistry: analytical and immunological testing
Including sample preparation
C436S164000, C436S166000, C436S179000, C422S068100, C422S082050, C422S082090
Reexamination Certificate
active
08003405
ABSTRACT:
A method for determining the volume of a test liquid aliquot used to calibrate a liquid delivery device. The method is useful for determining the volume of an aliquot of a test liquid which is complex, non-aqueous or both. A mixture contains the test liquid and a stock solution including a first dye, the first dye having absorbance characteristics which are measurably distinguishable from the absorbance characteristics of a second dye. The mixture is mixed with a diluent including the second dye to form a sample solution used to measure absorbances of the first dye and the second dye. The test liquid and the stock solution are combined gravimetrically in a controlled ratio so that the flow characteristics of the test-stock mixture correspond to the flow characteristics of the test liquid and without affecting the ability to distinguish the absorbance characteristics between the first dye and the second dye.
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Albert Keith J.
Bradshaw John Thomas
Rogers Alex L.
Artel, Inc.
Caseiro Chris A.
Chan Cedric
Dana, LLP Verrill
Warden Jill
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