Sample Preparation

SHIMSEN Styra Ph is a phenyl-bonded silica cartridge. It has the same non-polar interaction as C8, and also has the unique - electron pair interaction due to phenyl. It is a good choice for sample preparation when C8 could not provide the desired selectivity. And it has good selectivity for aromatic compounds with benzene ring.

SHIMSEN Styra C2 is an ethyl bonded silica cartridge and has weaker non-polar interation compared to C8. It is an excellent replacement for C8 when highly hydrophobic compounds are too strongly retained for effective elution. Highly endcapping of this sorbent inhibits secondary interactions caused by silanol groups, resulting in less adsorption of basic compounds. It is an excellent replacement for C8 and C18 when analytes are too strongly retained for effective elution.

SHIMSEN Styra C8 is an octyl bonded silica cartridge and has weaker non-polar interation compared to C18. C8 is an excellent replacement for C18 when highly hydrophobic compounds are too strongly retained for effective elution. Highly endcapping of this sorbent inhibits secondary interaction caused by silanol groups, resulting in less adsorption of basic compounds.

SHIMSEN Styra C18-U is an octadecyl bonded silica cartridge and can retain target compounds by non-polar interaction. The phase is non-endcapped which enhances retention of polar compounds.

SHIMSEN Styra PSA is based on silica gel particles bonded with ethylenediamino-N-propyl which contain two different amino―the pKa of one is 10.1, and other is 10.9. It is similar to NH2 cartridge but has stronger ion exchange functionalities. At the same time, PSA can be used to extract metal ion due to the chelation with metal ion.

SHIMSEN Styra NH2 is an amino bonded silica cartridge and can act either as a weak anion exchanger (aqueous solutions) or polar phase sorbent (non-polar organic solutions). When conditioned with a non-polar solvent, e.g., hexane, it tends to form hydrogen bond with any molecule containing -OH, -NH, or -SH functional groups. In an aqueous environment with pH 7.8 or less, it can function as a weak anion exchanger.

SHIMSEN Styra AL-B is packed with basic alumina (Al2O3) to retain or remove polar compounds and basic compounds. Basic alumina has anionic properties and cation exchange function, and tends to retain compounds with positive charges or hydrogen bonds. In addition, it can be used to retain electronic samples, such as neutral amines.

SHIMSEN Styra AL-A is packed with acidic alumina (Al2O3) to retain or remove polar compounds and acidic compounds. Acidic alumina is a typical Lewis acid with two electrons missing from the aluminum atom. Acid treatment enhances the Lewis acid property of alumina, and results in a weak cationic property, allowing strong interaction with electron-rich compounds and retention of polar compounds and anionic compounds.

SHIMSEN Styra AL-N is packed with neutral alumina (Al2O3) to retain or remove polar compounds. Similar to silica gel, neutral Al2O3 is a strongly polar sorbent. However, the neutral alumina tends to be slightly more stable under high pH conditions than silica gel. The neutralized surface allows interaction with compounds whose heteroatoms are electronegative (e.g., O, P, S) or with an electron-rich, highly aromatic structure.

SHIMSEN Styra CN exhibits both non-polar and polar interactions with target compound. It is a good choice when sorbents such as C18, C8 or Si do not provide the desired selectivity.