Sample Preparation

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.

SHIMSEN Styra FL-PR is based on natural Flori silica (MgO • SiO2) and is used for the recovery or cleanup of polar substances from non-polar solvents. This sorbent is high in polarity and can be used to extract polar compounds from non-polar solutions. The larger particle size (200 μm) of the sorbent enables fast flow for large sample volumes and is therefore an attractive alternative to silica if the sample matrix is particularly viscous. FL-PR can not only separate chlorinated insecticides, but also be used in AOAC, EPA and other methods. In addition, FL-PR is an excellent replacement for alumina cartridge when the acidic nature of alumina affects the extraction effect.

SHIMSEN Styra SI is based on unbonded silica gel particles. The primary interaction available is strong polar interaction due to the silanol groups. It can be used for enrichment of polar compounds from low-polar solvents or removal of polar impurities from non-polar solvents. It is necessary to prevent moisture absorption before use.

SHIMSEN Styra WAX uses a polymeric anion-exchange resin that combines the outstanding properties of SHIMSEN Styra HLB with weak anion exchange functionalities. WAX is suitable for the enrichment and purification of strong acidic compounds with pKa 1 or less.