The Gilson GX-271 Aspec and GX-274 Aspec solid-phase extraction (SPE) systems automate positive-pressure SPE for pharmaceutical, clinical, forensic or environmental applications.
The SPE technique can provide sample clean-up, sample preparation and trace analyte enrichment thanks to its inherent versatility, selectivity, speed and low solvent usage, according to the company.
The GX-271 Aspec is a single-probe unit; however, for users requiring a faster throughput with parallel processing, the four-probe GX-274 Aspec is more suitable.
To complement the automated SPE instrument range, Gilson offers a range of SPE cartridges and plates from Macherey-Nagel.
Specialised supports include the Chromabond Quechers - a method used for the determination of pesticides in food samples.
Quechers are used in a non-retentive manner with no column wetting or conditioning necessary.
By pairing the Quechers cartridges with the Gilson GX-271/4 Aspec, the automated analysis of pesticides in food such as grapes and strawberries is now a routine procedure.
Gilson has prepared a custom, non-mobile rack to hold 40 cartridges per rack instead of the normal 16, and larger tubes can collect volumes of up to 15ml.
Samples are dispensed to the top of the column and allowed to drip through under gravity.
The analyte of interest passes straight through the column and into the collection vial, while the impurities are retained on the column for disposal.
