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Product or
polymer compositions require a variety of methods for analysis. Organic chemicals,
solvents, polymers, additives, etc. can be identified using GC, GCMS, LC, and IR.
Occasionally pyrolysis-GCMS, NMR, or other techniques may be required, but generally most
components in the percent to ppm range can be determined. Inorganic components are usually
identified using X-Ray Fluorescence and X-Ray diffraction. Occasionally IC, LC,
IR, and
ICPMS are useful for some components. The analysis of additives and contaminants can
usually be achieved using these same techniques coupled with different sample extraction,
concentration, and/or cleanup techniques. For example, a residual monomer in a
polyacrylamide gel interocular product is extracted with methanol, cleaned-up by passing
the extract through a C18 solid phase extraction cartridge, then analyzed by LC or GC.
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