Flow Injection Polymer Analysis or FIPA is a rapid variant of SEC.

FIPA is a fast, automated technique for measuring molecular weight, molecular size and intrinsic viscosity of macromolecules. Depending on the sample, analysis times may be optimized to 6-10 samples per hour. Another bonus of FIPA measurements is minimal solvent and sample usage.
In FIPA the polymer or protein in solution is injected in a FIPA system with RI, light scattering and viscometer detectors. Unlike GPC/SEC, FIPA does not provide a distribution of information. Instead, the column technology in the FIPA experiment is used to separate the polymer or protein of interest from any low molecular weight constituents such as diluents, additives or salts that may be in the sample. The sample is measured as a single batch and the analysis takes only a few minutes.
Because of the simplicity, speed, precision and accuracy of the analysis, FIPA is well suited to process development or at-line applications where control of processes requires a fast turnaround time for sequential measurements of the extent of reaction.  Existing FIPA applications include: Polycarbonate, Polyvinyl acetate, Polymethyl methacrylate, Linear and branched polystyrene, Block copolymers, Low crystallinity olefin rubber, Polyimide, Phenolic resins, Polyurethane, High crystallinity olefin rubber, Xylene solubles of polyolefins, Polyvinyl alcohol, Polyacrylamide.