PEG GPC Calibration Standard Kits from JenKem Technology contain inactive hydroxyl linear and 4arm PEG raw material PEG standards, with narrower polydispersity and more accurate molecular weights compared to other PEG standards on the market. The molecular weight of the JenKem® PEG standards is determined by MALDI-TOF. The polydispersity of the JenKem® PEG standards is determined via GPC.
JenKem Technology’s Methoxy PEG GPC Calibration Standards kit (STDMPEG) includes 200 mg each of M-PEG-2000, M-PEG-5000, M-PEG-10K, M-PEG-20K, and M-PEG-40K. JenKem Technology’s 4ARM PEG GPC Calibration Standards kit (STD4ARMPEG) includes 200 mg each of 4ARM-PEG-2000, 4ARM-PEG-5000, 4ARM-PEG-10K, 4ARM-PEG-20K, and 4ARM-PEG-40K. For global distribution, please visit link. To order directly from JenKem Technology visit:
|PEG PRODUCT||INCLUDED MW||MAIN PEAK FRACTION BY GPC||POLYDISPERSITY BY GPC|
|STDMPEG||2kDa, 5kDa, 10kDa, 20kDa, 40kDa||≥ 95%||≤ 1.05|
|STD4ARMPEG||2kDa, 5kDa, 10kDa, 20kDa, 40kDa||≥ 95%||≤ 1.05|
Gel permeation chromatography (GPC) is a type of size exclusion chromatography. GPC separates mixture components based on size, and it can be used to determine the number average molecular weight (Mn), weight average molecular weight (Mw), and peak average molecular weight of polymers. The quality of the PEG standards is very important for GPC characterization of PEGs and PEGylated products. GPC is commonly used to determine the polydispersity of the polymers, which is the weight average molecular weight (Mw) over number average molecular weight (Mn).
Matrix-assisted laser desorption/ionization (MALDI) is a soft ionization technique used in mass spectrometry, allowing the analysis of polymers which tend to be fragile and fragment when ionized by more conventional ionization methods. The accuracy of MALDI-TOF is about 0.1% – 0.01%, much higher than that of SDS and GPC.
1. Prednisolone-a-cyclodextrin-star PEG polypseudorotaxanes with controlled drug delivery properties, Org. Biomol. Chem., 2010, 8, 5423–5430.
2. Targeted antifungal delivery system: β-Glucosidase sensitive nystatin–star poly(ethylene glycol) conjugate, International Journal of Pharmaceutics 2010, 386(1–2), p: 1–5.
Founded in 2004 by recognized experts in PEG synthesis and PEGylation, JenKem Technology specializes exclusively in the development and manufacturing of high quality polyethylene glycol (PEG) products and derivatives, and related custom synthesis and PEGylation services. JenKem Technology is ISO 9001 and ISO 13485 certified, and adheres to ICH Q7A guidelines for GMP manufacture. The production of JenKem® PEGs is back-integrated to on-site manufacturing from ethylene oxide, enabling facile traceability for GMP regulated customers. JenKem Technology caters to the PEGylation needs of the pharmaceutical, biotechnology, medical device and diagnostics, and emerging chemical specialty markets, from laboratory scale through large commercial scale.