PSA Magnetic Beads

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Product Infomation

Product Name	PSA Magnetic Beads
Catalog Number	MGB-BM-033
Description	PSA magnetic beads (Si-PSA) are superparamagnetic magnetic particles surface-modified with N-propylethylenediamine (PSA) functional groups, widely used as functional magnetic beads mainly for selective binding of target molecules via ion exchange. Si-PSA magnetic microspheres are monodisperse, non-aggregated spherical particles with uniform size, superparamagnetism, rapid magnetic response, monodispersity, and submicron dimensions. N-propylethylenediamine contains two amine groups (primary and secondary amine) with high pKa values (10.1 and 10.9 respectively), granting PSA microspheres higher ion exchange capacity and stronger ion-exchange performance. Additionally, the PSA bonded phase acts as a bidentate ligand to provide chelation effects, resulting in relatively low polarity.
Applications	Electrostatic interaction; adsorption of biological molecules, bacterial separation, molecular coupling
Features	Good stability and batch-to-batch reproducibility; uniform particle size with monodisperse distribution; excellent storage stability; fully coated with a silica layer; stable performance; withstands etching by 6M hydrochloric acid for >5 minutes.
Surface Groups	PSA (25-35 μmol/g)
Core	Fe3O4
Shell	SiO2
Magnetic Type	Superparamagnetic
Saturation Magnetization	70-80 emu/g
Storage	2-8°C
Shelf Life	2 years

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