For polymer separations the pore sizes should be on the order of the polymers being analyzed. If a sample has a broad molecular weight range it may be necessary to use several GPC columns in tandem to resolve the sample fully. Application[ edit ] GPC is often used to determine the relative molecular weight of polymer samples as well as the distribution of molecular weights. What GPC truly measures is the molecular volume and shape function as defined by the intrinsic viscosity. Polystyrene standards with dispersities of less than 1.
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Overload and reverse polarity protection keep it and its loads safe from unexpected conditions. The GPCD features continuous or dynamic internal load selection and serial or parallel tracking for application flexibility. Price does not in most cases include measurement performance data. Pricing does include NIST traceable calibration and issue of a calibration certificate and calibration label.
Pricing may vary slightly due to volume and location of laboratory supporting calibration. Volume pricing may apply. On-site fees may apply depending on logistics, location and volume of work to be completed during the visit. Related Bench Equipment Terms and Definitions. Averaging Averaging is a mathematical process to reduce the variation in a measurement by summing the data points from multiple measurements and dividing by the number of points summed.
Fall Time Fall time is the time required for the amplitude of a pulse to decrease fall from a specified value usually 90 percent of the peak value exclusive of overshoot or undershoot to another specified value usually 10 percent of the maximum value exclusive of overshoot or undershoot.
Noise Density Noise Density is the amount of noise within a defined bandwidth, usually normalized to 1 Hz.
Weitere Informationen zu Produkt GPC-3030D von GW Instek bei Bürklin Elektronik:
Gel permeation chromatography
Gw Instek GPS-3030 Manuals