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Purospher® STAR Si (5 µm) HPLC Columns

Chromolith® RP-18 Endcapped Monolithic HPLC ColumnsMilliporeSigma 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).

Highly Efficient HPLC of Low Molecular Weight Compounds

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.

Features and Benefits

  • Classified as L3 USP column
  • Ideal for normal-phase HPLC of low molecular weight compounds soluble in organic solvents
  • Excellent separation efficiency as measured by plate count
  • Absence of metal impurities for consistently symmetrical peaks
  • Extended column lifetime

Application Examples

Separation of anisoles

Specifications Purospher® STAR Si (5 µm)

Sorbent characteristics High-purity silica gel
Metal content Na, Ca, Mg, Al: 1 ppm; Fe: 3 ppm
Particle shape Spherical
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
Shipping eluent n-Heptane
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