Omega Scientific offers a wide range of molecular weight standards for Gel Permeation Chromatography (GPC) and Size Exclusion Chromatography (SEC) for conventional and universal calibration.
GPC/SEC reference materials and standards are mainly used to create a GPC/SEC calibration curve. The calibration curve allows the user to:
- determine molar mass distributions and averages for unknown samples;
- measure pore sizes using inverse GPC/SEC for porous materials;
- quantify the resolution of GPC/SEC columns;
- identify the optimum separation range of GPC/SEC columns.
GPC/SEC reference materials are available for many different polymer types. They are classified as either aqueous standards for water-based GPC/SEC or as organic standards for GPC/SEC in organic solvents.
Individual Standards
The following list of materials are available as single calibration standards of various molecular weights. They are typically packed in either a 1,000 mg, 500 mg or 250 mg bottle.
Each bottle comes with a Certificate of Analysis, which provides the characterisation information, testing parameters, molecular weight values (Mn, Mw, Mp, PDI) and the chromatogram.
Organic Standards | Aqueous Standards |
|---|---|
Polystyrene Poly(alpha-methylstyrene) Poly(methyl methacrylate) Poly(n-butyl methacrylate) Poly(t-butyl methacrylate) Poly(butadiene-1.4) Poly(ethylene) Poly(2-vinylpyridine) Poly(ethylene terephthalate) | Dextran Pullulan Hydroxyethyl starch Poly(ethylene glycol) Poly(ethylene oxide) Poly(methacrylic acid) sodium salt Poly(acrylic acid) sodium salt Poly(styrene sulfonate) sodium salt Poly(vinyl alcohol) |
Calibration Kits
Each calibration kit consists of 8 to 12 bottles of individual standards of different molecular weights. The kits include a calibration report and quality certificates with analytical parameters and molar mass information for every single standard.
Organic Calibration Kit | Aqueous Calibration Kit |
|---|---|
Poly(styrene) | Dextran |
ReadyCal Kit
The ReadyCal Kit consist of a material with a mixture of different molecular weights that have been pre-weighed and packed into autosampler vials. Each kit contains 3 x 10 autosampler vials sufficient for at least 10 calibration curves. Each of the 3 different colour coded vials contains three or four polymers of the same type with carefully selected different molar masses.
The ReadyCal Kit allows you to prepare quickly and reproducibly an 8 to 12 point calibration curve without the inconvenience of weighing samples. Just add solvent directly into the autosampler vial, let it stand for two hours, shake gently and inject. ReadyCal Kits are available as 1.5 ml or 4.0 ml vials.
Organic ReadyCal Kit | Aqueous ReadyCal Kit |
|---|---|
Poly(styrene) | Dextran |