it is possible to
manufacture several desirable photomasks rapidly and easily at
low-cost. In this paper, we describe the mPADs for patterning
hydrophilic and hydrophobic zones on the paper using a
photomask produced with a 3D printer. The resolution for
hydrophilic and hydrophobic channels on the paper fabricated
with this method was examined. The feasibility of the proposed
device was evaluated by the analysis of iron in river and tap water
samples