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A disposable α-amylase biosensor based on ferrocene as an electron transfer mediator has been developed by the screen-printing technique. The PVC plate was coated with the sliver ink as the conductive track. Aside from the two end of the PVC plate, the PVC ink was deposited onto the conductive track as the insulating layer. The one end of the plate uncoated with PVC ink was an electrical contact site,...
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