GPC Standards
We promise to support our clients with various organic/inorganic material R&Ds with utmost sincerity.
To measure the molecular weight by GPC analysis, a Calibration curve must be present; thus, polymer standards with known molecular weights are required.
Our institute has various polymer standards (Polystrene, PMMA, PEG/PEO, Polysaccharide, Polyacrylic acid, polystyrene sulfonic acid, etc.) in possession, which can be used to produce highly reliable results. The most commonly used standard for THF-GPC is monodisperse Polystyrene from ionic polymerization, where various products with range of Mp 162 to tens of thousands of Mp are commercialized. For example, there is a commercialized Calibration kit with contains ten polymer standards with different molecular weight in a single product, which makes drawing Calibration curves much easier. For water-soluble polymers, polystyrene and PMMA does not dissolve in the aqueous conditions, so PEG/PEO polymer standards are commonly used. If the polymer is a polysaccharide-type, it is desirable to use standard with similar structure to polysaccharide like Pullulan or Dextran standard rather than PEG/PEO standards.
Koptri is a professional GPC institute that has various polymer standards, eluents and columns in possession to tailor any GPC set-ups depending on the target polymers of our clients to produce most reliable and accurate result.
List of polymeric standards and respective molecular weights in KOPTRI
※ 표 좌우 스크롤 사용
| Standards | PS (Polystyrene) | PMMA (Poly(methyl methacrylate)) | PEG/PEO (Poly(ethylene glycol) / Poly(ethylene oxide)) | PAA (Polyacrylic acid) | PSS (Polystyrene sulfonic acid) | Polysaccharides |
|---|---|---|---|---|---|---|
| Molecular weight (Mp) |
1,074,000 729,500 537,000 290,300 194,500 133,500 75,050 27,810 17,970 9,590 4,910 3,090 1,920 580 162 |
955,000 659,000 138,500 121,600 30,620 9,150 4,900 2,680 850 162 |
1,039,000 545,000 272,400 219,900 117,900 66,200 48,290 28,330 21,230 10,370 3,870 1,450 600 |
1,100,000 323,000 62,900 16,000 1,250 |
2,613,000 673,000 131,000 29,500 4,600 |
642,000 337,000 194,000 107,000 47,100 22,000 9,800 6,100 667 180 |
Exemplary chromatograms of various polymer standards
THF-GPC chromatogram of PS standards (typical)
THF-GPC chromatogram of PS standards (Using Low molecular weight column)
THF-GPC chromatogram of PMMA standards
Aqueous-GPC chromatogram of PEG/PEO standards
Aqueous-GPC chromatogram of Polysaccharide standards
