Sorbents, silica gel & ion exchangers

Silica gel 60 is the standard for normal-phase column chromatography and separates by polarity. Aluminium oxide comes in acidic, neutral and basic versions and suits compounds that decompose on silica, such as the aluminium oxide 90, neutral; the type is in the product title. Ion exchangers and mixed-bed resins separate or remove ions, for example for desalting or making deionised water, like the mixed bed resin, 25 l. To test conditions first, run a TLC on TLC and HPTLC plates. Questions? Ask sales@luminixhealth.com.

The particle size follows the technique. A fine fraction, such as 0.04–0.063 mm, is for flash chromatography under pressure and gives sharp separations, like the silica gel 60, 0.04–0.063 mm. Coarser fractions are for gravity columns, where liquid has to run through by itself. Coarse granules, such as the silica gel 60, 0.5–1.0 mm, are mainly used for drying, for example in desiccators. Grades with a UV254 indicator are for coating your own plates. For drying, see also desiccators and desiccant. Questions? Ask sales@luminixhealth.com.

Loose sorbent, silica gel and ion-exchange resin are the phases bought in bulk to pack a column or to stir into a solution. Particle size and activity, or the ion-exchange capacity, are the specification. A TLC silica and a flash silica of different particle sizes are not the same separation.

Solid-phase extraction holds a compound on a sorbent while the rest of the sample is washed away, then releases it in a small volume. The sorbent, the bed mass and the solvents are the method. Silica, ion exchangers and polymer phases do different jobs. A flash column is the same idea scaled toward purification rather than trace cleanup. The molecules are on PubChem, named by IUPAC.

This shelf belongs to SPE & sample preparation, inside Chromatography equipment. Luminix Health distributes this range for laboratory use.

The neighbouring shelves are SPE cartridges & columns and Flash, empty & glass chromatography columns. The category above this shelf is SPE & sample preparation.

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