Praesto MiniChrom columns are designed for process development and parameter screening, as well as for small scale purification or sample preparation. Minichrom 8x20mm columns have a 2 cm bed height and a resin volume of 1 mL. MiniChrom columns are packed by Atoll GmbH and delivered ready for use. They are 100% quality checked for HETP and asymmetry. Individual laser labelling ensures traceability to corresponding resin and column performance data. The columns are made of biocompatible polypropylene. Praesto MiniChrom 8x20mm pre-packed columns provide a small bed volume for fast results and minimal sample and buffer consumption, as well as convenience in media screening and easy, direct connection to most chromatography systems Praesto Q45 is an agarose-based strong anion exchange resin. Praesto Q45 is designed for large-scale biomolecule purification, but is also an excellent choice for small scale applications. Praesto Q45 can be used for purification of different biomolecules, including proteins, peptides and oligonucleotides. The particle size (45µm) makes Praesto Q45 the smallest particle of the Praesto family and thus particular useful for high resolution applications.


Principal Applications

  • Protein purification
  • MAb Purification


  • Cost effective without compromising buffer consumption or processing time
  • Very high reproducibility and scalability
  • Pre-packed and pre-qualified
  • High productivity and high capacity
  • Excellent pressure/flow performance
  • Secure, validated supply and regulatory support

Regulatory Approvals

  • Manufactured under cGMP conditions

Typical Packaging

  • Prepacked 1ml column

Typical Physical & Chemical Characteristics:

Polymer Structure Agarose - Strong Anion Exchanger
Appearance Spherical beads
Functional Group Quaternary amine
Inner diameter 8 mm
Packed bed height 20 mm
Column volume 1 ml
Connector fingertight 1/16", female
Column material Polypropylene
Bed support Filter
Chemical stability All commonly used aqueous buffers, pH 1-14, organic solvents, 1M NaOH, 8M urea, 6M guanidine hydrochloride, 30% isopropanol and 70% ethanol
Avoid Halogenated organic solvents, hexane, oxidising agents, anionic detergents
Working pressure (max.) 5 bar
Ionic capacity - resin 0.14 - 0.18 mmol/ml
Ionic capacity - medium 0.14 - 0.18 mmol Cl⁻/ml
Particle Size - µm 45 µm
Dynamic Binding Capacity (min.) - 6 minutes residence time 70 BSA/ml
Pressure/flow (min.) - at 3 bar in a 2.6 x 20 cm column (pressure-packed at 4 bar) 200 cm/h
pH stability, CIP (short term) 2 - 14
pH stability, working range 3 - 13
Recommended Storage 4 - 30 °C
Recommended Storage 20% ethanol