Purospher® STAR Si (5 µm) HPLC Columns
MilliporeSigma offers a broad range of HPLC columns that are fully compliant with USP (United States Pharmacopoeia) specifications. L3 USP columns are described as consisting of porous silica particles, 1.5 to 10 µm in diameter. Our L3 USP columns are produced to the highest quality standards to ensure reliable, reproducible results. A perfect example is: Purospher® STAR Si (5 µm).
Purospher® STAR Si (5 µm) is a L3 USP column that offers the highest separation efficiency for normal-phase HPLC of low molecular weight compounds soluble in organic solvents. Based on high-purity silica, Purospher® STAR Si also benefits from the absence of metallic impurities, resulting in consistently symmetrical peaks.
|Sorbent characteristics||High-purity silica gel|
|Metal content||Na, Ca, Mg, Al: 1 ppm; Fe: 3 ppm|
|Particle size||5 µm|
|Pore size||120 A (12 nm)|
|Pore volume||1.1 mL/g|
|Spec. surface area||330 m²/g|
|Coverage of the surface||3 µmol/m²|
|pH range||pH 2-7.5|
|Efficiency||> 50.000 N/m|