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DMF GPCThis GPC system is designed for applications using DMF or DMF with 0.1M LiBr. It consists of an Agilent model 1260 Infinity pump, a Rheodyne model 7725 manual injector with a 200 µ l loop, and a Varian 390 LC detector system consisting of an RI detector and a two angle light scattering detector. the following column set is used: four PSS (Polymer Standards Service) GRAM; 8×300 mm; 10µm; 100, 1000, and 3000 Å along with an 8×50, 10µm guard column. The columns are calibrated with a set of PS standards in the molecular weight range of ≈600 up to 7,500,000 daltons.