Determination of molecular weight and polydispersity of macromolecular polymers by gel permeation chromatography (GPC) has been widely used in various industries due to its advantages of simple operation, economy and speed. For this method, when determining the sample to be tested, it is necessary to select a standard sample to make the standard curve. Therefore, for accurate determination of the molecular weight of polymer, the correct selection of the standard sample is particularly important.

There are various high molecular weight polymers on the market that can be used to analyze the molecular weight and polydispersity of polyethylene glycol, such as polystyrene, polymethyl methacrylate, etc. The most accurate standard used for polyethylene glycol analysis should be polyethylene glycol standard.

The polyethylene glycol standard produced by Jiankai Technology has the characteristics of accurate molecular weight, low polydispersity, and wide range. The molecular weight of the polyethylene glycol standard was accurately measured using the MALDI-TOF method by Jiankai Technology, and the polydispersity analysis was performed using the GPC method, with a molecular weight range of 2000-40000.

The methoxy polyethylene glycol series of polyethylene glycol standards includes the following molecular weight standards: M-PEG-2000; M-PEG-5000; M-PEG-10K; M-PEG-20K; M-PEG-40K.

The multi arm polyethylene glycol series polyethylene glycol standards include the following molecular weight standards: 4ARM-PEG-2000; 4ARM-PEG-5000; 4ARM-PEG-10K; 4ARM-PEG-20K; 4ARM-PEG-40K.