New generation   Resolve Columns (7.8 mm x 300 mm)   are produced to allow separation over the molecular weight range from 500 to 12,000,000 g/mol (PS equivalent) for 13 µm particle size packing materials. Polyolefins often have broad molecular weight ranges characterized by high polydispersity values. RQM+ Lab Services has developed mixed bed columns especially for these broad distribution samples which were designed by blending a large number of individual pore size packing materials.

RQM+ Lab Services Mixed bed 13 µm columns have highly linear calibration curves with a coefficient of determination (R2) of 0.999 over the molecular weight range 500 to 12,000,000 g/mol (PS equivalent) for 13 µm. These columns have the ability to separate very broad samples without peak dislocations/shoulders for highly polydisperse samples.

Analysis of NIST polyethylene standards including NIST 2887, 1475a and 1476a along with industry samples of polypropylene, polyethylene and polystyrene have been performed to demonstrate column performance at elevated temperatures (160ºC).

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