ASTRA®

Why ASTRA®?

Why ASTRA®?

The ASTRA® has been developed in the Czech Republic to offer an alternative to a broad range of general HPLC columns. ASTRA® brings a completely new and unique stationary phase with a polar-embedded group to offer complementary selectivity.

Hover over the icons to learn more about ASTRA®.

Click on the icons to learn more about ASTRA®.

New and unique multimodal phases

C18 phases with endcapping in gaseous process

Strict quality control during the silica gel production

Redundant production system

Production process ensuring lot-to-lot reproducibility

The best quality/price ratio

ASTRA® phases Particle size (µm) Pore size (Å) Surface area (m2/g) Carbon load pH stability Endcapping 100% aqueous mobile phase USP code
C18-HE 3, 5 100 330 17 % 2 to 9 High × L1
C18-AQ 3, 5 100 330 13 % 2 to 9 Mixed ✓ L1
DM 3, 5 100 330 12 % 2 to 9 High × –

What Does ASTRA® Quality Look Like?

What Does ASTRA® Quality Look Like?

ASTRA® particles have a very tight distribution and the highest proximity to the shape of a spherical particle ….

ASTRA® vs. Competitor

ASTRA®Competitor

ASTRA® Up Close

ASTRA® Silicagel

Particle Size
5 μm
3 μm
Metal Content
<10 ppm
<10 ppm
Mean particle diameter
4.6 ± 1.2 μm
3.0 ± 0.7 μm
Proximity to the sphere
0.97 ± 0.04
0.97 ± 0.03 μm

ASTRA® Ultrapure Silica Gel Particles

ASTRA® Ultrapure Silica Gel Particles

  • Close proximity to the sphere

  • Highly effective endcapping

  • No broken particles

  • Robustness under high pressure

  • Batch-to-batch reproducibility

  • Column-to-column reproducibility