(under subclass 161) Processes or compositions in which the sorbent comprises a fibrous web or a thin coating of sorptive material or a flat substrate and wherein separation occurs along the plane of the web or coating.
SEE OR SEARCH CLASS
210, Liquid Purification or Separation,
658, for a process of paper or thin layer chromatography without the use of a chromophore to separate a material into its constituents.
