ASTRA

Category:

Ideal for: Pharmaceutical, Environmental, and Nutraceutical applications
HE mainly used for hydrophobic stationary phases
pH range stability 2 to 9
Endcapping of the HPLC Column bonded phase minimizes silanol interaction and protects the silica support from dissolution. Different endcapping procedures are utilized today in modern HPLC column phases. Endcapping refers to the replacement of available silanol groups in a bonded stationary phase with TMS.

C18 AQ stationary phases are Retentive and Selective for polar compounds.Under 100% H₂O conditions, an increase in retention of the analytes is observed with ASTRA®C18 AQ phases.
Ideal for: pharmaceuticals (active ingredients, metabolites, impurities, excipients), oligonucleotides, peptides, polypeptides
Usually for multicomponent LC-MS analyses
pH range stability 2 to 9

C18 BDS stationary phases are ideal for wide range of analytes including acids, bases and neutrals
Intended use for: QA & QC Lab swith longer column lifetime
Offering : excellent reproducibility, reduced tailing, exceptional peak symmetry for basic and acidic compounds
pH rangestability 2 to 8

Designed for: good separation effect on polar compounds, and it is also used for the determination of amino acids
Ideal for: highly polar compounds that have poor retention on reversed-phase columns. Mostly used for organic acids and their polymers, furthermore suitable for most normal phase chromatography applications.
Good selectivity without excessive retention
More stabile than the NH₂ and Standard Silica columns
pH range stability 2 to 7,5

The new generation phase with a novel structure – a polar embedded phase with a polar selector (proprietary stationary phase).
Ideal fo: better separation of various APIs in comparism with traditional C18 phases. Furthermore: amines and aminoacids
Used also for: monitoring of impurities in pharmaceutical drugs or infusion solutions
Excellent peak shapes for bases like a minesor aminoacids
DM phase acts like a multistationary phase

Silica-based stationary phase having covalently bound zwitterionic functional groups as well as hydrophobic and hydrophilic sites
Ideal for: better separation of Oligomers (oligonucleotides)
Weak electrostatic interactions with charged analytes
Separation may be performed in totally aqueous buffers
Retention of anions or cations is determined based on the charged group nearest the hydrophobic C18 chain
Retention also based on the pH

Ideal for: effective separation of common sugars, separation of some organic acids using suitable mobile phase
good repeatability and precision for routine analysis