Patent ID: 6923939

Claim:
An apparatus for screening materials in an array comprising: a) a cell comprising a first portion and a second portion, said cell having a fluid inlet and at least one fluid outlet and said first portion defining a passage; b) a window positioned within the cell adjacent the first portion and in alignment with the passage; c) a fluid permeable array support spaced apart from, and in alignment with, the window wherein the array support has at least two locations for the window wherein the array support has at least two locations for supporting material; d) a semipermeable membrane adjacent the array support; e) a membrane support adjacent to the semipermeable membrane; f) said fluid inlet and one fluid outlet positioned on opposite sides of the combination of the array support and the semipermeable membrane; and g) a location selective heat source in alignment with the windows, wherein said location selective heat source sequentially heats the materials at the locations of the array support.