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Selecting a stationary phase for a fluid analyzer using certain criteria to determine an appropriate material for use in, for instance, a micro fluid analyzer. High absorption of an analyte or sample, low water sorbency and high porosity or permeability of the material may be sought. A selected mate

Selecting a stationary phase for a fluid analyzer using certain criteria to determine an appropriate material for use in, for instance, a micro fluid analyzer. High absorption of an analyte or sample, low water sorbency and high porosity or permeability of the material may be sought. A selected material may incorporate a toughening agent using a neutral leaving group. A selected material may have a capping agent to promote hydrophobicity. A selected material may be a hydrophobic polymer. The selection of a stationary phase may involve molecular modeling.

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What is claimed is: 1. A method for making a stationary phase for a fluid analyzer, comprising: selecting a material, and wherein selecting a material includes utilizing computer based molecular modeling and qualitatively comparing interactions from a molecular scale; and applying the material on a

What is claimed is: 1. A method for making a stationary phase for a fluid analyzer, comprising: selecting a material, and wherein selecting a material includes utilizing computer based molecular modeling and qualitatively comparing interactions from a molecular scale; and applying the material on a support member; wherein the material comprises a hydrophobic polymer and a porous dielectric having a toughening agent that uses a neutral leaving group and has: an adsorption energy that monotonically increases with molecular weight or boiling point; and a potential activity to resist water interference during adsorption; and wherein the polymer comprises: polynorbornene; polytetrafluoroethylene; fluorinated polyolefins; and/or novolac resins. 2. The method of claim 1, wherein the material further has: a nonpolar property; and a temperature tolerance greater than 200 degrees C. 3. The method of claim 1, wherein the material comprises an organic low k dielectric. 4. The method of claim 1, wherein the material comprises nanotubes. 5. The method of claim 1, wherein the material is a composite comprising a low k inorganic and a low k organic mixture.