Automated DNA purification and multiplexed lamp assay preparation on a centrifugal microfluidic “Lab-on-a-Disc” platform

This work presents a rotational-pulse actuated micro-fluidic cartridge enabling automated detection of plant pathogens on a compact device towards point-of-use monitoring of food safety. This highly integrated “Lab-on-a-Disc” (LoaD) system first runs the sample over a stationary phase of silica beads, followed by ethanol (EtOH) wash and final elution of DNA. The eluate is then homogenized using `shake mode' agitation, accurately metered and then mixed with reagents for loop-mediated isothermal amplification (LAMP). We successfully purify plant DNA and demonstrate on-disc quantitative LAMP amplification.