Automated capture and on-column detection of biotinylated DNA on a disposable solid support

This work comprises the development of a technique for the capture of single-stranded DNA on a solid support combined with in situ quantification. The capture is based on the strong and selective interaction between biotinylated DNA and streptavidin-coated agarose beads. Sequential Injection in the lab-on-valve format allows for automated manipulation of all components including the building and disposal of bead columns. Detection was accomplished using the OliGreen fluorescent dye and optimization of the assay achieved a limit of detection of 111 pg ssDNA, with a total assay time of roughly 2.5 min per sample.