Empore™ Solid Phase Extraction (SPE) Disks provide an efficient alternative to liquid/liquid extraction for sample preparation. A proprietary process is used to entrap adsorbent particles into an inert matrix of PTFE to create a mechanically stable sorbent disk. The disks can be used for purification and concentration of analytes from aqueous samples.
Empore™ SPE disks provide a sample prep solution for large volume aqueous samples. The disk format provides a large surface area for sorbent/sample contact. Fast flow rates and high throughput may be realized with use of an Empore solid phase extraction disk.
Empore™ extraction disks are available in a variety of sorbent chemistries to compliment most analytical applications. Each sorbent exhibits unique properties of retention and selectivity for a particular analyte. The choice of which sorbent is best for a particular method will be influenced by the percent recovery of analyte from the sample matrix and the cleanliness of the resulting chromatography.

Product Characteristics

The Empore SPE disks are available in 47 and 90 mm diameters. Empore 47 mm disks are efficient at processing relatively clean samples (samples with low suspended solids). The Empore 90 mm disks are efficient at processing larger volume samples or samples with greater amounts of suspended solids. Empore™ Filter Aid 400 and/or prefiltration may be helpful if the sample contains excessive particulates. If the sample contains a high concentration of suspended solids, allow the particles to settle (overnight if necessary). Tilting the sample container to allow particulates to settle on one side is suggested to aid in decanting only the liquid portion of the sample. Particulates can be added to the reservoir after most of the sample has been processed. The 90 mm disk is recommended for samples with excessive particulates or to reduce sample processing times.
Empore SPE disks are high density (HD) membranes are composed of chromatographic particles averaging 10 - 12 µ in size. The high density membranes are designed for maximum extraction efficiency with minimal elution volumes of samples that have less matrix interference.

Product Selection

Empore™ extraction disks are available in a variety of sorbent chemistries to compliment most analytical applications. The following list of available sorbents is organized by the type of extraction.

Reversed Phase Extractions
C8 or C18
SDB-XC
Oil & Grease
DiskActivated Carbon

Mixed Phase Extractions
SDB-RPS (Reversed Phase Sulfonate)

Ion-Exchange Extractions
Anion Exchange-SR
Cation Exchange-SR
Chelating Resin