Patent ID: 6514704
Filing Date: 2003-02-04
Classification: G01N

Abstract:
A method of providing a quality assurance check to a biological assay printed on a substrate, using a multi-ejector system having a plurality of individual drop ejectors, the method of providing a quality assurance check comprising:loading drop ejectors of the multi-ejector system with a variety of biofluids, the biofluids including a carrier fluid, a biological material and at least one marker; storing expected signature output signals for the biofluid loaded in the drop ejectors; printing the biological assay consisting of drops from the biofluid loaded in the drop ejectors; scanning the drops of the biological assay with a scanner capable of detecting the markers; obtaining signature output signals for the drops of the biological assay; comparing the obtained signature output signal for a specific drop and the expected signature output signal for the biofluid loaded in the drop ejector which ejected the specific drop; and verifying proper loading of the biofluids, proper storage of the expected signature output signals and proper placement of the biofluid drop, when the comparing step results in a desired correlation between the expected signature output and the obtained signature output.