HPLC and UPLC Columns

Puritas BIO eximius 300Å C8



PURITASTM BIO EXIMIUS C8 phases are bonded with octyl groups and are fully end capped. They are recommended for compounds which are too strongly retained on BIO C18 phases. PURITASTM BIO EXIMIUS C8 phases are available in particle sizes of 5, 10 and 15 microns for both analytical as well as preparative applications. These phase are widely used for larger molecules such as proteins with higher hydrophobicity.

The improved high density bonding and full end capping makes it very suitable to general use and to separate or purify high molecular weight compounds, especially proteins. Because of the significant improvement in durability and acidic, alkalic resistance it can be used for extended period of time in acidic mobile phase condition and rinsed for recovery with NaOH containing buffer.

Key Features

  • The perfect silica gel for biopharmaceutical applications
  • Novel chemical bonding assures stability under severe alkalic and acidic conditions
  • Designed for high molecular weight peptides or smaller proteins purification
  • 30nm pore size with narrow distribution range
  • Totally spherical particles made of ultra high purity silica gel
  • Featuring extended acidic and alkalic resistance and high durability



Average particle size *) 5.0μm
Average pore size 300Å
Specific surface area (m2/g) 100
Average pore volume (ml/g) 0.8
Particle size distribution (D40/D90) 4.1

*)The Specification of particle size and physical properties are those of base silicagel



APPLICATION: HUMAN INSULIN 4.6mm x 250mm, 300Å, 5µm

Chromachemie Proprietary information




Mobile phase:
A: 0.1% TFA in H2O:ACN (80:20)
B: 0.1% TFA in H2O:ACN (10:90)
Gradient: 0-60% B in 15 min
Flow Rate: 1ml/min
Injection Volume: 20µl
Detection: 280nm

1. Human Insulin

Ordering Information


Product code Column Dimensions Particle Size (µm) Bonding Phase
PBE08-05-300-250 250mm x 4.6mm 5 C8
PBE08-05-300-150 150mm x 4.6mm 5 C8
PBE08-05-300-100 100mm x 4.6mm 5 C8
PBE08-05-300-050 50mm x 4.6mm 5 C8
PBE08-10-300-250 250mm x 4.6mm 10 C8